Jump to content
GreenSock

Search In
  • More options...
Find results that contain...
Find results in...

Search the Community

Showing results for tags 'javascript'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • GreenSock Forums
    • GSAP
    • Banner Animation
    • Jobs & Freelance
  • Flash / ActionScript Archive
    • GSAP (Flash)
    • Loading (Flash)
    • TransformManager (Flash)

Product Groups

  • Club GreenSock
  • TransformManager

Categories

  • FAQ Landing Page

Categories

  • Examples
  • Showcase

Categories

  • Products
  • Plugins

Categories

  • Learning Center
  • Blog

Categories

  • ScrollTrigger Demos

Categories

  • CodePen Challenges

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Location


Interests

  1. Hello All, So I'm trying to learn Javascript as well as can be expected, and I'm considering what are the absolute best assets where I could learn it? Anyone knows any online books or any other resources, I love to learning but I am confused where I can start learning.
  2. GreenSock

    BezierPlugin

    Note: This plugin was replaced with MotionPathPlugin in GSAP 3. Please see the GSAP 3 release notes for details. Animate virtually any property (or properties) along a curved Bezier path which you define as an array of points/values that can be interpreted 4 different ways (described as the Bezier's "type", like type:"soft"? "thru" (the default) - the plugin figures out how to draw the Bezier naturally through the supplied values using a proprietary algorithm. The values you provide in the array are essentially treated as anchors on the Bezier and the plugin calculates the control points. The target's current/starting values are used as the initial anchor. You can define a curviness special property that allows you to adjust the tension on the Bezier where 0 has no curviness (straight lines), 1 is normal curviness, 2 is twice the normal curviness, etc. Since "thru" is the default Bezier type, you don't need to define a type at all if this is the one you want. "soft" - the values that you provide in the array act almost like magnets that attract the curve towards them, but the Bezier doesn't typically travel through them. They are treated as control points on a Quadratic Bezier and the plugin creates the necessary intermediate anchors. The target's current/starting values are used as the initial anchor. "quadratic" - allows you to define standard Quadratic Bezier data (Quadratic Beziers have 1 control point between each anchor). The array should start with the first anchor, then control point, then anchor, control point, etc. for as many iterations as you want, but obviously make sure that it starts and ends with anchors. "cubic" - allows you to define standard Cubic Bezier data (Cubic Beziers have 2 control points between each anchor). The array should start with the first anchor, then 2 control points, then anchor, 2 control points, anchor, etc. for as many iterations as you want, but obviously make sure that it starts and ends with anchors. For full details please consult the BezierPlugin documentation.
  3. GreenSock

    TweenMax

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. TweenMax is the most feature-packed (and popular) animation tool in the GSAP arsenal. For convenience and loading efficiency, it includes TweenLite, TimelineLite, TimelineMax, CSSPlugin, AttrPlugin, RoundPropsPlugin, BezierPlugin, and EasePack (all in one file). See the Pen GSAP Overview by GreenSock (@GreenSock) on CodePen. Quick links Getting started What's so special about GSAP? Full documentation Showcase (examples) Since TweenMax extends TweenLite, it can do ANYTHING TweenLite can do plus more. You can mix and match TweenLite and TweenMax in your project as you please. Like TweenLite, a TweenMax instance handles tweening one or more properties of any object (or array of objects) over time. TweenMax's unique special properties TweenMax's syntax is identical to TweenLite's. Notice how the TweenMax tween below uses the special properties: repeat, repeatDelay, yoyo and the onRepeat event callback. //basic illustration of TweenMax's repeat, repeatDelay, yoyo and onRepeat var box = document.getElementById("greenBox"), count = 0, tween; tween = TweenMax.to(box, 2, {left:"740px", repeat:10, yoyo:true, onRepeat:onRepeat, repeatDelay:0.5, ease:Linear.easeNone}); function onRepeat() { count++; box.innerHTML = count; TweenLite.set(box, {backgroundColor:"hsl(" + Math.random() * 255 + ", 90%, 60%)"}); } See the Pen TweenMax basic repeat and onRepeat by GreenSock (@GreenSock) on CodePen. Staggered animations TweenMax makes it easy to create staggered animations on multiple objects. The animations can overlap, run in direct sequence or have gaps between their start times. TweenMax's three stagger methods: TweenMax.staggerTo(), TweenMax.staggerFrom() and TweenMax.staggerFromTo() are literal one-line wonders. See the Pen TweenMax.staggerTo() by GreenSock (@GreenSock) on CodePen. Additional Methods TweenMax inherits a ton of methods from TweenLite and has quite a few of its own. ul.chart {width:300px; float:left; margin-right:80px; } ul.chart li:nth-child(1){ font-weight:bold; list-style:none; margin-left:-20px; font-size:20px; margin-bottom:20px; } TweenLite and TweenMax Methods delay() delayedCall() duration() eventCallback from() fromTo() getTweensOf() invalidate() isActive() kill() killDelayedCallsTo() killTweensOf() pause() paused() play() progress() restart() resume() reverse() reversed() seek() set() startTime() time() timeScale() to() totalDuration() totalProgress() totalTime() Methods exclusive to TweenMax getAllTweens() isTweening() killAll() killChildTweensOf() pauseAll() repeat() repeatDelay() resumeAll() staggerFrom() staggerFromTo() staggerTo() updateTo() yoyo() Learn more in the TweenMax documentation.
  4. GSAP 3 is the most significant upgrade we have ever had. With 50+ new features, there's a lot to be excited about, but to keep this post manageable, we’ll cover only 5. You might also be interested in the GSAP 3 highlights video. See the release notes for all the juicy details. 1. Half the size of the old TweenMax! No kidding! GSAP retains almost all of its old functionality while adding 50+ features. We’ve learned a lot over the years and hopefully that shows. The core has been completely rebuilt from the ground up as modern ES modules. 2. Simplified API No more “Lite” and “Max” flavors. TweenMax, TweenLite, TimelineLite, and TimelineMax have all been consolidated into a single "gsap" object. So simple! For example: //simple tween like the old TweenMax.to(...) gsap.to(".class", {duration:2, x:100}); //create a timeline and add a tween var tl = gsap.timeline(); tl.to(".class", {duration:2, x:100}); Internally, there's one "Tween" class (replaces TweenLite/TweenMax) and one "Timeline" class (replaces TimelineLite/TimelineMax), and both have all of the features like repeat, yoyo, etc. When you call one of the gsap methods like .to(), .from(), etc., it returns an instance of the appropriate class with easily chainable methods. Duration is now defined in the vars object. This allows several benefits such as: Improved readability It fits much better with keyframes It allows default durations to be inherited (more on that below) You can use function-based values //OLD - duration was 2nd parameter TweenMax.to(".class", 1, {x:100}); //NEW - duration is now a property of the vars object gsap.to(".class", {duration:1, x:100}); All tweens are now stagger-able. There’s no need for the old staggerTo(), staggerFrom(), or staggerFromTo() methods because you can add staggers to regular tweens: //simple stagger gsap.to(".class", { x: "+=100", duration: 1, stagger: 0.5 //space each element's animation out by 0.5 seconds }); //advanced stagger gsap.to(".class", { x: "+=100", duration: 1, stagger: { amount: 2, from: "center", grid: "auto", onComplete: myFunction //define callbacks inside the stagger to make them apply to each sub-tween } }); See the Pen GSAP 3.0 Stagger demo by GreenSock (@GreenSock) on CodePen. For more information about GSAP’s advanced stagger functionality, see this codepen. New, more compact ease format. less typing, more readable, and zero import hassles. Here's the new convention for all of the standard eases: //old way Elastic.easeOut Elastic.easeIn Elastic.easeInOut Elastic.easeOut.config(1, 0.5) SteppedEase.config(5) //new way "elastic" //same as "elastic.out" "elastic.in" "elastic.inOut" "elastic(1, 0.5)" //same as "elastic.out(1, 0.5)" "steps(5)" Backwards compatible The new GSAP even adjusts itself to accommodate the old syntax! There's technically no more TweenMax, TweenLite, TimelineLite, or TimelineMax, but they're all aliased so that the vast majority of legacy code still works, untouched! You don't have to rewrite all your code for GSAP 3, but we'd recommend shifting to the new, more concise syntax for all your new projects. 3. Inheritance/Defaults You don't have to keep setting the same ease over and over again...or duration...or whatever. Just set defaults on the parent timeline and let them be inherited by all its children! For example this repetitive code can be shortened, saving you time. //old way, without timeline defaults var tl = new TimelineMax(); tl.to(obj1, 2, {ease: Power2.easeInOut, rotation: -180}) .to(obj2, 2, {ease: Power2.easeInOut, rotation: -360}) .to(obj3, 2, {ease: Power2.easeInOut, rotation: -180}); //new way, with timeline defaults var tl = gsap.timeline({defaults:{ease: "power2.inOut", duration: 2}}); tl.to(obj1, {rotation: -180}) //child tweens will inherit the duration and from the parent timeline! .to(obj2, {rotation: -360}) .to(obj1, {rotation: -180}); See the Pen GSAP 3.0 Cube Walk by Pete Barr (@petebarr) on CodePen. Any defaults you set this way will get pushed into every child tween - it’s not limited to a certain subset of properties. This can really save you some typing! Inherited defaults are easily overwritten anytime a property is declared on a child. 4. All new MotionPathPlugin The new MotionPathPlugin makes it very easy to move any element along an SVG <path>! For more information about the MotionPathPlugin, check out its documentation and the video below. See the Pen GSAP 3.0 Stagger demo by GreenSock (@GreenSock) on CodePen. Club GreenSock members also get access to the new MotionPathHelper utility that lets you EDIT the motion path interactively in the browser. It’s never been so easy to move elements along a path! 5. New utility methods GSAP 3 exposes some surprisingly useful utility methods that might save you time and hassle. Need values to snap to the closest one in an array? Use gsap.utils.snap(). Tired of trying to figure out how to pull a random element out of an array? Let gsap.utils.random() do it for you. Want to distribute any value among an array of elements, complete with easing? It’s a piece of cake with gsap.utils.distribute(). Here’s how to use the gsap.utils.interpolate() method: //numbers let value = gsap.utils.interpolate(0, 100, 0.5); // 50 //strings let value = gsap.utils.interpolate("20px", "40px", 0.5); // 30px //colors let value = gsap.utils.interpolate("red", "blue", 0.5); // rgba(128,0,128,1) //objects let value = gsap.utils.interpolate({a:0, b:10, c:"red"}, {a:100, b:20, c:"blue"}, 0.5); // {a: 50, b: 15, c: "rgba(128,0,128,1)"} There's also an explainer video about how to use it. Using GSAP's built in utility functions can make complex code simple. Check out the video below to learn more and see an example: For a full list of the utility functions, some demos, and how to use them, check out the docs. There's waaaaay more... We've only scratched the surface of all the improvements in GSAP 3. Check out the release notes for a full list of the features and changes. There's also an updated getting started page. Ready to play? GSAP 3 Starter Pen (a CodePen template that already has the GSAP 3 files loaded. Fork away and have a blast!) This pen allows you to copy the resource URLs easily. Or download the files to use locally. Using a build tool? npm install gsap will get you the files. If you're a Club GreenSock user, there's a gsap-bonus.tgz tarball file in the local download above that you can simply drop into your project's folder and then npm install ./gsap-bonus.tgz and BOOM, it'll be installed just like any other package! See the installation docs for more information. Questions? Bugs? Hit us up in the forums or contact us directly. We'd love to hear what you think of GSAP 3. Happy tweening!
  5. The GreenSock Animation Platform (GSAP) animates anything JavaScript can touch (CSS properties, SVG, React, canvas, generic objects, whatever) and solves countless browser inconsistencies, all with blazing speed (up to 20x faster than jQuery). See why GSAP is used by over 8,500,000 sites and many major brands. Hang in there through the learning curve and you'll discover how fun animating with code can be. We promise it's worth your time. Quick links Loading GSAP Tweening Basics CSSPlugin 2D and 3D transforms Easing Staggers Callbacks Sequencing with Timelines Timeline control Getter / Setter methods Club GreenSock We'll cover the most popular features here but keep the GSAP docs handy for all the details. First, let's talk about what GSAP actually does... GSAP is a property manipulator Animation ultimately boils down to changing property values many times per second, making something appear to move, fade, spin, etc. GSAP snags a starting value, an ending value and then interpolates between them 60 times per second. For example, changing the x coordinate of an object from 0 to 1000 over the course of 1 second makes it move quickly to the right. Gradually changing opacity from 1 to 0 makes an element fade out. Your job as an animator is to decide which properties to change, how quickly, and the motion's style (known as easing - we'll get to that later). To be technically accurate, we could have named GSAP the "GreenSock Property Manipulator" (GSPM) but that doesn't have the same ring. DOM, SVG, <canvas>, and beyond GSAP doesn't have a pre-defined list of properties it can handle. It's super flexible, adjusting to almost anything you throw at it. GSAP can animate all of the following: CSS: 2D and 3D transforms, colors, width, opacity, border-radius, margin, and almost every CSS value. SVG attributes: viewBox, width, height, fill, stroke, cx, r, opacity, etc. Plugins like MorphSVG and DrawSVG can be used for advanced effects. Any numeric value For example, an object that gets rendered to an <canvas>. Animate the camera position in a 3D scene or filter values. GSAP is often used with Three.js and Pixi.js. Once you learn the basic syntax you'll be able to use GSAP anywhere that JavaScript runs. This guide will focus on the most popular use case: animating CSS properties of DOM elements. (Note: if you're using React, read this too.) If you're using any of the following frameworks, these articles may help: React Vue Angular What is GSAP Exactly? GSAP is a suite of tools for scripted animation. It includes: The GSAP core - The lightweight core of the engine which animates any property of any object. It makes use of tweens and to give you more control over your animations. Extras like time-saving plugins, easing tools, utility functions, and more. Loading GSAP Downloading GSAP
  6. GreenSock

    CustomEase

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Are your animations meant to feel playful? Robotic? Slick? Realistic? If they had a voice, what would they sound like? To become an animation rock star, you must develop a keen sense of easing because that's what determines the style of movement between point A and point B. GreenSock's new CustomEase frees you from the limitations of canned easing options. Create literally any ease imaginable. Zero limitations. CSS animations and WAAPI offer cubic-bezier() which is great but with only two control points it's impossible to create more complex effects like bouncing, elastic, wiggles, rough/jerky eases, etc. Plus you can't make an ease return to its starting values (like a ball jumping into the air and falling back to the ground with a bounce). Features Unlimited anchors and control points. Copy/Paste any SVG <path> (including directly from Adobe Illustrator). Use CSS cubic-bezier() values (For example, from cubic-bezier.com). Editor has snapping, undo, sample code and other conveniences. Start with any standard ease and customize it. getSVGData() method turns any ease into SVG <path> data for display at the size you define. Extremely optimized for runtime performance. Free for anyone with a GreenSock account. Reading Ease Curves, Editing, and Using CustomEase Here's an in-depth video tour that'll get you up to speed with exactly how to use CustomEase: Ready to play? Check out the new Ease Visualizer with CustomEase support. Edit the curve as much as you want: Download CustomEase Get CustomEase by creating a FREE GreenSock account which gets you access to our community forums plus you’ll receive our exclusive “GreenSock Insider” email series (you can unsubscribe anytime). Use the widget below to sign up (or if you’re already logged in, you’ll get immediate access to the download zip containing CustomEase). Note: CustomEase is not in the github repository or CDN; it's only available for download at GreenSock.com. [loginwidget]
  7. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. SplitText is an easy to use JavaScript utility that allows you to split HTML text into characters, words and lines. Its easy to use, extremely flexible and works all the way back to IE8. Although SplitText is naturally a good fit for creating HTML5 text animation effects with GreenSock's animation tools, it has no dependencies on GSAP, jQuery or any other libraries. .videoNav { color:#555; margin-top: 12px; } 0:00 Intro 0:21 SplitText solves problems 2:01 Basic Split 3:34 Configuration options 6:35 Animation View the JS panel in the Codepen demo above to see how easy it is to: Split text into words and characters. Pass the chars array into a TweenMax staggerFrom() tween for animation. Revert the text back to its pre-split state when you are done animating. Additional features and notes You can specify a new class to be added to each split element and also add an auto-incrementing class like .word1, .word2, .word3 etc. View demo You don't have to manually insert <br>tags, SplitText honors natural line breaks. SplitText doesn't force non-breaking spaces into the divs like many other solutions on the web do. SplitText is not designed to work with SVG <text> nodes. Learn more in our detailed SplitText API documentation. Please visit our SplitText Codepen Collection for more demos of SplitText in action. Where can I get it? SplitText is a membership benefit of Club GreenSock ("Shockingly Green" and "Business Green" levels). Joining Club GreenSock gets you a bunch of other bonus plugins and tools like ThrowPropsPlugin as well, so check out greensock.com/club/ to get details and sign up today. The support of club members has been critical to the success of GreenSock - it's what makes building these tools possible.
  8. GreenSock

    GSDevTools

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Your animation workflow is about to get a major boost. GSDevTools gives you a visual UI for interacting with and debugging GSAP animations, complete with advanced playback controls, keyboard shortcuts, global synchronization and more. Jump to specific scenes, set in/out points, play in slow motion to reveal intricate details, and even switch to a "minimal" mode on small screens. GSDevTools makes building and reviewing GSAP animations simply delightful. Get Started Load the JavaScript file //be sure to use a path that works in your dev environment Requirements GSDevTools requires TweenMax (well, actually just CSSPlugin, TweenLite, TimelineLite, AttrPlugin which are all included in TweenMax) version 1.20.3 or higher. It also uses Draggable under the hood, but in order to minimize hassle for end users, Draggable is included inside the GSDevTools file itself. How do I get it? GSDevTools is available to Club GreenSock members ("Shockingly Green" and above). Just download GSAP with the bonus files zip from your Dashboard. Try GSDevTools for free on CodePen. FAQ Why is my Global Timeline 1000 seconds long? That means you've probably got an infinitely repeating animation somewhere. GSDevTools caps its duration at 1000 seconds. Scrubbing to Infinity is awkward. Does loading GSDevTools impact runtime performance? Since it must monitor and record the root timeline, yes, there is a slight performance hit but probably not noticeable. Keep in mind that usually you'll only load GSDevTools while you're developing/reviewing your animations and then remove it when you're ready to launch, so ultimately it shouldn't be much of a factor anyway. Why isn't GSDevTools in the CDN or Github repo? Because it's a membership benefit of Club GreenSock. It's a way for us to give back to those who support our ongoing development efforts. That's why we've been able to continue innovating for over a decade. See https://greensock.com/why-license for details about our philosophy. Does GSDevTools work with other animation libraries? Nope, it depends on some unique capabilities baked into the GSAP architecture. What will I do with all the time this tool saves me? Take up a new hobby, ponder deep philosophical questions, make cookies - it's up to you.
  9. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Scrambles the text in a DOM element with randomized characters (uppercase by default, but you can define lowercase or a set of custom characters), refreshing new randomized characters at regular intervals while gradually revealing your new text (or the original text) over the course of the tween (left to right). Visually it looks like a computer decoding a string of text. Great for rollovers. See the Pen GSAP Scramble Text Plugin - feature plugin page by GreenSock (@GreenSock) on CodePen. You can simply pass a string of text directly as the scrambleText and it'll use the defaults for revealing it, or you can customize the settings by using a generic object with any of the following properties: text : String - the text that should replace the existing text in the DOM element. If omitted (or if "{original}"), the original text will be used. chars : String - the characters that should be randomly swapped in to the scrambled portion the text. You can use "upperCase", "lowerCase", "upperAndLowerCase", or a custom string of characters, like "XO" or "TMOWACB", or "jompaWB!^", etc. (Default: "upperCase") tweenLength : Boolean - if the length of the replacement text is different than the original text, the difference will be gradually tweened so that the length doesn't suddenly jump. For example, if the original text is 50 characters and the replacement text is 100 characters, during the tween the number of characters would gradually move from 50 to 100 instead of jumping immediatley to 100. However, if you'd prefer to have it immediately jump, set tweenLength to false. (Default: true) revealDelay : Number - if you'd like the reveal (unscrambling) of the new text to be delayed for a certain portion of the tween so that the scrambled text is entirely visible for a while, use revealDelay to define the time you'd like to elapse before the reveal begins. For example, if the tween's duration is 3 seconds but you'd like the scrambled text to remain entirely visible for first 1 second of the tween, you'd set revealDelay to 1. (Default: 0) newClass : String - if you'd like the new text to have a particular class applied (using a <span> tag wrapped around it), use newClass:"YOUR_CLASS_NAME". This makes it easy to create a distinct look for the new text. (Default: null) oldClass : String - if you'd like the old (original) text to have a particular class applied (using a <span> tag wrapped around it), use oldClass:"YOUR_CLASS_NAME". This makes it easy to create a distinct look for the old text. (Default: null) speed : Number - controls how frequently the scrambled characters are refreshed. The default is 1 but you could slow things down by using 0.2 for example (or any number). (Default: 1) delimiter : String - by default, each character is replaced one-by-one, but if you'd prefer to have things revealed word-by-word, you could use a delimiter of " " (space). (Default: "") //use the defaults TweenLite.to(element, 1, {scrambleText:"THIS IS NEW TEXT"}); //or customize things: TweenLite.to(element, 1, {scrambleText:{text:"THIS IS NEW TEXT", chars:"XO", revealDelay:0.5, speed:0.3, newClass:"myClass"}});
  10. GreenSock

    Draggable

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. #container { margin:0; padding:0; font-family: Signika Negative, Asap, sans-serif; font-weight: 300; font-size: 17px; line-height: 150%; } #container h1 { font-family: Signika Negative, Asap, sans-serif; font-weight: 300; font-size: 48px; margin: 10px 0 0 0; padding: 0; line-height: 115%; text-shadow: 1px 1px 0 white; } #container h2 { font-family: Signika Negative, Asap, sans-serif; font-weight: normal; font-size:30px; color: #111; margin: 18px 0 0 0; padding: 0; line-height:115%; } #container p { line-height: 150%; color:#555; margin: 0 0 10px 0; } #container a { color:#71b200; } #container .normalBullets code { font-size: inherit; color: inherit; font-weight: normal; line-height: inherit; font-family: inherit; } #container .normalBullets li strong { font-size: 110%; } #container .normalBullets li { margin-bottom:8px; } #container .blackBG h1, #container .darkBG h1 { color: #ddd; text-shadow: none; } #container .blackBG p { color: #999; } #container .section { width: 100%; text-align: center; position: relative; padding: 20px; } /* .block was causing conflict with wp theme --- renamed below */ #container .customblock { padding: 10px; text-align: left; position: relative; } #container .blackBG { background-color: black; } #container .lightBG { background-color: #e4e4e4; } #container .subtleDark { color: #999; text-shadow: none; } #container .blackBG p strong { color:#ddd; font-weight: normal; } #container .controls { background-color: #222; border: 1px solid #555; color: #bbb; font-size: 18px; } #container .controls ul { list-style: none; padding: 0; margin: 0; } #container .controls li { display: inline-block; padding: 8px 0 8px 10px; margin:0; } /** CODE **/ #container .code { width: 100%; border: 1px solid #555; padding: 0; margin: 20px 0; } #container .code pre.prettyprint { margin:0; overflow: auto; } #container .codeTitle { color: #aaa; background-color: #111; padding: 8px; font-size:18px; border-bottom: 1px solid #555; } #container code, #scroller code { color: black; font-size: 16px; } #container .blackBG code, #container .darkBG code { /* carl removed color: #ccc; */ } #container pre { font-size: 1.1em; padding:8px; background-color:#333; color:white; border: 1px solid #777; } /** TOSS **/ #container .box { background-color: #91e600; text-align: center; font-family: Asap, Avenir, Arial, sans-serif; width: 196px; height: 100px; line-height: 100px; overflow: hidden; color: black; position: absolute; top:0; -webkit-border-radius: 10px; -moz-border-radius: 10px; border-radius: 10px; } /** BUTTONS **/ #container .button { display:inline-block; border-radius:8px; border-bottom-width: 2px; box-shadow: inset 0px 1px 0px rgba(255,255,255,0.6), 0px 3px 6px 0px rgba(0, 0, 0, 0.6); cursor:pointer; text-align: center; font-family: Signika Negative, Asap, Avenir, Arial, sans-serif; position:relative; margin: 4px; color:black; } #container .largeButton { padding: 12px 24px; font-size: 20px; margin: 12px 8px; min-width:110px; } .greenGradient { border: 1px solid #6d9a22; background-color: #699a18; background: linear-gradient(to bottom, #8cce1e 0%,#699a18 52%,#639314 53%,#76b016 100%); /* W3C */ text-shadow: 1px 1px 2px #384d16; color:#fff; text-decoration: none; } /** EXPANDABLE POINTS (FAQ) **/ .expPoint, .expList li { list-style: none; line-height: normal; margin: 0 0 0 8px; padding: 6px 4px 4px 24px; position:relative; border: 1px solid rgba(204,204,204,0); font-size: 110%; color: #111; font-weight: normal; } .expPoint, .expContent { font-family: Signika Negative, Asap, sans-serif; font-weight: 300; line-height: 140%; } .expPoint:hover, .expList li:hover { background-color:white; border: 1px solid rgb(216,216,216); } .expContent { height: 0; overflow: hidden; color: #444; margin: 2px 0 0 0; padding-top: 0; font-size:16px; } .expMore { color: #71b200; text-decoration: underline; font-size:0.8em; } .arrow-right { width: 0; height: 0; border-top: 5px solid transparent; border-bottom: 5px solid transparent; border-left: 6px solid #999; display:inline-block; margin: -4px 8px 0 -14px; vertical-align: middle; opacity:0.8; } .tableCellDesktop { display: table-cell; } .tableCellDesktop img { left: 120px; } @media screen and (max-width: 860px) { .tableCellDesktop { display: block; } .tableCellDesktop img { left: 0px; } } Features Touch enabled - works great on tablets, phones, and desktop browsers. Incredibly smooth - GPU-accelerated and requestAnimationFrame-driven for ultimate performance. Compared to other options out there, Draggable just feels far more natural and fluid, particularly when imposing bounds and momentum. Momentum-based animation - if you have ThrowPropsPlugin loaded, you can simply set throwProps:true in the config object and it'll automatically apply natural, momentum-based movement after the mouse/touch is released, causing the object to glide gracefully to a stop. You can even control the amount of resistance, maximum or minimum duration, etc. Complex snapping made easy - snap to points within a certain radius (see example), or feed in an array of values and it'll select the closest one, or implement your own custom logic in a function. Ultimate flexibility. You can have things live-snap (while dragging) or only on release (even with momentum applied, thanks to ThrowPropsPlugin)! Impose bounds - tell a draggable element to stay within the bounds of another DOM element (a container) as in bounds:"#container" or define bounds as coordinates like bounds:{top:100, left:0, width:1000, height:800} or specific maximum/minimum values like bounds:{minRotation:0, maxRotation:270}. Sense overlaps with hitTest() - see if one element is overlapping another and even set a tolerance threshold (like at least 20 pixels or 25% of either element's total surface area) using the super-flexible Draggable.hitTest() method. Feed it a mouse event and it'll tell you if the mouse is over the element. See http://codepen.io/GreenSock/pen/GFBvn for a simple example. Define a trigger element - maybe you want only a certain area to trigger the dragging (like the top bar of a window) - it's as simple as trigger:"#topBar", for example. Drag position, rotation, or scroll - lots of drag types to choose from: "x,y" | "top,left" | "rotation" | "scroll" | "x" | "y" | "top" | "left" | "scrollTop" | "scrollLeft" Lock movement along a certain axis - set lockAxis:true and Draggable will watch the direction the user starts to drag and then restrict it to that axis. Or if you only want to allow vertical or horizontal movement, that's easy too using the type ("top", "y" or "scrollTop" only allow vertical movement; "x", "left", or "scrollLeft" only allow horizontal movement). Rotation honors transform origin - by default, spinnable elements will rotate around their center, but you can set transformOrigin to something else to make the pivot point be elsewhere. For example, if you call TweenLite.set(yourElement, {transformOrigin:"top left"}) before dragging, it will rotate around its top left corner. Or use % or px. Whatever is set in the element's css will be honored. Rich callback system and event dispatching - you can use any of the following callbacks: onPress, onDragStart, onDrag, onDragEnd, onRelease,, onLockAxis, and onClick. Inside the callbacks, "this" refers to the Draggable instance itself, so you can easily access its "target" or bounds, etc. If you prefer event listeners instead, Draggable dispatches events too so you can do things likeyourDraggable.addEventListener("dragend", yourFunc); Works great with SVG Even works in transformed containers! Got a Draggable inside a rotated/scaled container? No problem. No other tool handles this properly that we've seen. Auto-scrolling, even in multiple containers - set autoScroll:1 for normal-speed auto scrolling, or autoScroll:2 would scroll twice as fast, etc. The closer you move toward the edge, the faster scrolling gets. See a demo here (added in version 0.12.0) Sense clicks when the element moves less than 3 pixels - a common challenge is figuring out when a user is trying to click/tap an object rather than drag it, so if the mouse/touch moves less than 3 pixels from its starting position, it will be interpreted as a "click" and the onClick callback will be called (and a "click" event dispatched) without actually moving the element. You can define a different threshold using minimumMovement config property, like minimumMovement:6 for 6 pixels. All major browsers are supported including IE9+. IE8 lacks hitTest() support. See full documentation here. See our Codepen Draggable Collection here. To get ThrowPropsPlugin (for the momentum-based features), join Club GreenSock today. You'll be glad you did. If not, we'll gladly issue a full refund.
  11. GreenSock

    GSAP 2.1 Released

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. There are plenty of large and small updates in GSAP 2.1; here are a few highlights... Advanced staggers Advanced staggering makes it surprisingly simple to get rich, organic timing effects with very little code. Each tween's start time can be distributed according to any ease and/or based on how close each element is to a position in the list. For example, you can have things emanate outward from the "center" or a certain index. It'll even accommodate grids, complete with auto-calculated columns and rows (great for responsive layouts)! The interactive demo below explains it all visually (notice there's an embedded video explanation too): See the Pen Advanced Staggers in GSAP by GreenSock (@GreenSock) on CodePen. So setting up an advanced stagger is as simple as: TweenMax.staggerTo(".yourClass", 2, { scale:0.1, y:40, stagger:{ amount: 2, //total seconds to divide up among staggers from: "center", //or an index value. Determines where staggers originate grid:"auto", //or [columns, rows] ease: Power1.easeIn //determines spacing } }); Parts of the advanced staggering features were prompted by suggestions from GSAP users inspired by Julian Garnier's API in anime, so we tip our hat to his efforts. He's a great contributor to the animation community. MorphSVG type:"rotational" There's an entirely new type of morph that leverages rotational and length data to move anchors and control points which can deliver cleaner, more intuitive morphs. Plus it completely eliminates kinks that can occasionally creep in with linear interpolation. The video below explains. Watch the video To tap into this new style of morphing, just set the type:"rotational" TweenMax.to("#shape1", 2, { morphSVG:{ shape:"#shape2", type:"rotational" } }); Or set it as the default to affect all morphs: MorphSVGPlugin.defaultType = "rotational"; //default is "linear" Demo 1: preventing kinks See the Pen MorphSVG type:'rotational' for preventing kinks by GreenSock (@GreenSock) on CodePen. Demo 2: more natural morphs See the Pen MorphSVG type:'rotational' for more natural morphs by GreenSock (@GreenSock) on CodePen. Fixing odd results by declaring a custom origin The default origin is 50% 50% which usually works great, but sometimes the rotations around that point look odd, as shown below. In cases like this, it's best to experiment and set your own custom origin to improve things even more. We created a findMorphOrigin() utility function which is in the codepen below (and you can copy it into your own) which allows you to simply feed in a start and end shape and then it'll superimpose an origin that you can drag around and see exactly how it affects the morph! In the demo below, go into the JS panel and un-comment the findMorphIndex() line and you'll see exactly how this works. Drag the origin around and watch how it affects things. See the Pen MorphSVG: fixing origin weirdness by GreenSock (@GreenSock) on CodePen. Note: you must load Draggable for this to work. So to set a custom origin, it would look like: TweenMax.to("#shape1", 2, { morphSVG:{ shape:"#shape2", type:"rotational", origin:"20% 60%" //or to define a different origin for the start and end shapes, "20% 60%,45% 30%" } }); Is the new type:"rotational" a silver bullet for making every morph perfectly intuitive? No, but it's a great option that delivers more natural morphs in many cases. MorphSVG canvas rendering SVG is fantastic, but sometimes developers have a canvas-based project (often for rendering performance reasons). They haven't been able to leverage the intuitive morphing that MorphSVG provides in a highly-performant way...until now. The new MorphSVG plugin allows you to define a render function that'll be called every time the path updates, and it will receive two parameters: rawPath [array]: A RawPath is essentially an array containing an array for each contiguous segment with alternating x, y, x, y cubic bezier data. It's like an SVG <path> where there's one segment (array) for each "M" command; that segment (array) contains all of the cubic bezier coordinates in alternating x/y format (just like SVG path data) in raw numeric form which is nice because that way you don't have to parse a long string and convert things. For example, this SVG <path> has two separate segments because there are two "M" commands: <path d="M0,0 C10,20,15,30,5,18 M0,100 C50,120,80,110,100,100" /> So the resulting RawPath would be: [ [0, 0, 10, 20, 15, 30, 5, 18], [0, 100, 50, 120, 80, 110, 100, 100] ] For simplicity, the example above only has one cubic bezier in each segment, but there could be an unlimited quantity inside each segment. No matter what path commands are in the original <path> data string (cubic, quadratic, arc, lines, whatever), the resulting RawPath will ALWAYS be cubic beziers. target [object]: the target of the tween (usually a <path>) This means you can even render morphs to super high-performance engines like PixiJS or anything that'll allow you to draw cubic beziers! Demo: MorphSVG canvas rendering See the Pen MorphSVG canvas rendering by GreenSock (@GreenSock) on CodePen. Here's an example of a tween and a render function that'd draw the morphing shape to canvas: var canvas = document.querySelector("canvas"), ctx = canvas.getContext("2d"), vw = canvas.width = window.innerWidth, vh = canvas.height = window.innerHeight; ctx.fillStyle = "#ccc"; TweenMax.to("#hippo", 2, { morphSVG:{ shape:"#circle", render:draw } }); function draw(rawPath, target) { var l, segment, j, i; ctx.clearRect(0, 0, vw, vh); ctx.beginPath(); for (j = 0; j To set a default render method for all tweens: MorphSVGPlugin.defaultRender = yourFunction; Got questions? If you haven't checked out the forums, you're missing out! It's a great place to get your questions answered and participate in the community. We carefully monitor and answer questions there. Changelog View the full changelog here (there's a lot). Happy tweening! DOWNLOAD GSAP NOW
  12. GreenSock

    GSAP 2.0 Released

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. We've been getting requests for better support of modern build tools. With version 2.0 we're pleased to announce a switch to ES modules via NPM which should make your building, bundling, and tree shaking even smoother. Don't worry, the UMD/CommonJS flavor is still available and the CDN serves the same browser-friendly files as always. If terms like "UMD", "ES Modules", and "tree shaking" leave you scratching your head, fear not - GSAP 2.0 will work like a champ for you (as usual). There are no syntax, API, or browser-support changes. None. The major version bump was primarily due to the switch to ES modules for NPM users, that's all. DOWNLOAD GSAP NOW NPM, ES Modules, Webpack, oh my! Modern bundlers like Webpack and Rollup just love to snack on ES modules these days, usually grabbing them from NPM. So GSAP 2.0 is extra delicious covered in its chocolatey ES module outer shell. (If you're not using a bundler or NPM, skip this section entirely) npm install gsap Then you can import individual classes like: import TweenMax from "gsap/TweenMax"; import Draggable from "gsap/Draggable"; TweenMax includes (and exports) many of the commonly-used classes so you can also do this: import { TweenMax, TimelineLite, Power2, Elastic, CSSPlugin } from "gsap/TweenMax"; (TweenMax includes TweenLite, TimelineLite, TimelineMax, CSSPlugin, RoundPropsPlugin, BezierPlugin, DirectionalRotationPlugin, AttrPlugin, and all eases except CustomEase, CustomWiggle, and CustomBounce) As a convenience, there's also an "all" file that imports/exports every GSAP tool (except members-only bonus plugins), so you can do this: import { TimelineMax, CSSPlugin, ScrollToPlugin, Draggable } from "gsap/all"; IMPORTANT: if your animations aren't working as expected, it's likely an issue with tree shaking which can be easily resolved by referencing any plugins you're using. Read more. UMD/CommonJS If your environment doesn't accommodate ES modules yet, don't worry - we've got you covered. There's a "umd" directory that contains...you guessed it...regular old ES5 UMD (Universal Module Definition) versions of the files which are compatible with pretty much everything (RequireJS, Browserify, etc.). So you could import them like: //get the UMD versions. Notice the "/umd/" in the path... import { TweenMax, Power2, TimelineLite } from "gsap/umd/TweenMax"; import ScrollToPlugin from "gsap/umd/ScrollToPlugin"; import Draggable from "gsap/umd/Draggable"; What about bonus plugins like MorphSVGPlugin? Obviously we can't distribute the members-only bonus plugins via NPM, so all you need to do is log into your GreenSock account and download the latest zip which has a "bonus-files-for-npm-users" folder with the bonus plugins. Then just plop that into your project, like maybe in your /src/ folder (or wherever) and import them directly. For example, to save some typing you could rename the "bonus-files-for-npm-users" to simply "gsap-bonus" and put that in the root of your project and then: import MorphSVGPlugin from "./gsap-bonus/MorphSVGPlugin"; import SplitText from "./gsap-bonus/SplitText"; You could certainly put the bonus files in /node_modules/gsap/ if you prefer, but most people don't like doing that because it makes things less portable/updatable. There's a brand new page in the docs dedicated to NPM usage. NEW: Custom rounding increments in RoundPropsPlugin Have you ever needed to round animated values to the nearest 10 or hundredth? With the new object syntax in RoundPropsPlugin, you can round properties to various custom increments, not just integers! Simply pass in [property]:[increment] pairs like so: TweenLite.to(element, 5, { x:600, y:100 roundProps:{ x:10, //round x to nearest increment of 10 y:0.1 //round y to nearest increment of 0.1 } }); Watch the video Demo See the Pen RoundPropsPlugin Update by GreenSock (@GreenSock) on CodePen. NEW: SplitText "specialChars" SplitText recognizes a new specialChars property that allows you to specify an array of special characters to protect. This is typically used for multi-character symbols like in some languages where there are pairs (or sometimes even 4 characters) combined to form a single character. See the Pen SplitText with specialChars feature by GreenSock (@GreenSock) on CodePen. No need to do this for most emoji's, though, because those are already supported natively in SplitText! Got questions? If you haven't checked out the forums, you're missing out! It's a great place to get your questions answered and participate in the community. We carefully monitor and answer questions there. Or feel free to contact us directly if you prefer. Changelog View the full changelog here (note: version 2.0.0 is just 1.20.5 with a version bump to avoid breaking changes for NPM users) Happy tweening! DOWNLOAD GSAP NOW
  13. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. As the author of GSAP I'm sometimes asked if the Web Animations API (WAAPI) will be used under the hood eventually. My responses have gotten pretty long so I thought I'd share my findings with everyone here. Hopefully this sheds light on the challenges we face and perhaps it can lead to some changes to WAAPI in the future. WAAPI is a native browser technology that's similar to CSS animations, but for JavaScript. It's much more flexible than CSS animations and it taps into the same mechanisms under the hood so that the browser can maximize performance. Support is a bit spotty right now and there are multiple levels to the spec, so some browsers may support only "level 1", for example, but the hope is that eventually all major browsers will support WAAPI fully. Progress in that direction has been very, very slow. You could think of WAAPI almost like a browser-level GSAP with a bunch of features stripped out. This has led some to suggest that perhaps GSAP should be built on TOP of WAAPI to reduce file size and maximize performance. Ideally, people could tap into the rich GSAP API with all of its extra features while benefiting from the browser's native underpinnings wherever possible. Sounds great, right? Unfortunately, WAAPI has some critical weak spots that make it virtually impossible for GSAP to leverage it under the hood (at least in any practical manner). I don't mean that as a criticism of WAAPI. In fact, I really wanted to find a way to leverage it inside GSAP, but I'll list a few of the top reasons why it doesn't seem feasible below. To be clear, this is NOT a feature comparison or a bunch of reasons why GSAP is "better" - these are things that make it architecturally impossible (or very cumbersome) to build GSAP on WAAPI. Custom easing WAAPI only supports cubic-bezier() for custom easing, meaning it's limited to one segment with two control points. It can't support eases like Bounce, Elastic, Rough, SlowMo, wiggle, ExpoScaleEase, etc. GSAP must support all of those eases plus any ease imaginable (unlimited segments and control points - see https://greensock.com/customease). This alone is a deal-breaker. Expressive animation hinges on rich easing options. Independent transform components The most commonly animated values are translation (x/y position), rotation, and scale (all transform-related) but you cannot control them independently with CSS or WAAPI. For example, try moving (translate) something and then halfway through start rotating it and stagger a scale toward the end: |-------- translateX() ------------| |------ rotate() ------| |---------- translateY() -----------| |-------------- scale(x,y) --------------| Animators NEED to be able to independently control these values in their animations. Additive animations (composite:"add") probably aren't an adequate solution either. It's unrealistic to expect developers to track all the values manually or assume that stacking them on top of each other will deliver expected results - they should be able to just affect the rotation (or whatever) at any time, even if there was a translate() or scale() applied previously. GSAP could track everything for them, of course, but continuously stacking transforms on top of each other seems very inefficient and I imagine it'd hurt performance (every transform is another matrix concatenation under the hood). There is a new spec being proposed for translate, scale, and rotate CSS properties which would certainly help, but it's not a full solution because you still can't control the x/y components independently, or all of the 3D values like rotationX, rotationY, z, etc. This is an essential feature of GSAP that helped it become so popular. Example See the Pen Independent Transforms Demo by GreenSock (@GreenSock) on CodePen. Custom logic on each tick Certain types of animations require custom logic on each tick (like physics or custom rounding/snapping or morphing). Most GSAP plugins rely on this sort of thing (ModifiersPlugin, for example). I'm pretty sure that's impossible with WAAPI, especially with transforms being spun off to a different thread (any dependencies on JS-based logic would bind it to the main thread). Non-DOM targets As far as I know, WAAPI doesn't let you animate arbitrary properties of generic objects, like {myProperty:0}. This is another fundamental feature of GSAP - people can use it to animate canvas library objects or generic objects...whatever. Global timing controls I don't think WAAPI lets you set a custom frame rate. Also, GSAP's lag smoothing feature requires the ability to tweak the global time (not timeScale - I mean literally the current time so that all the animations are pushed forward or backward). As far as I know, it's impossible with WAAPI. Synchronization (transforms and non-transforms) As demonstrated in this video, one of the hidden pitfalls of spinning transforms off to another thread is that they can lose synchronization with other main-thread-based animations. As far as I know, that hasn't been solved in all browsers. We can't afford to have things getting out-of-sync. Some have proposed that GSAP could just fall back to using a regular requestAnimationFrame loop to handle things that aren't adequately supported by WAAPI but that puts things at risk of falling out of sync. For example, if transforms are running on a separate thread they might keep moving while other parts of the animation (custom properties that get applied somehow in an onUpdate) slow down or jank. Compatibility GSAP has earned a reputation for "just working" across every browser. In order to deliver on that, we'd have to put extra conditional logic throughout GSAP, providing fallbacks when WAAPI isn't available or doesn't support a feature. That would balloon the file size substantially and slow things down. That's a tough pill to swallow. WAAPI still isn't implemented in several major browsers today. And then there are the browser inconsistencies (like the infamous SVG origin quirks) that will likely pop up over time and then we'd have to unplug those parts from WAAPI and maintain the legacy raw-JS mechanisms internally. Historically, there are plenty of cross-browser bugs in natively-implemented technologies, making it feel risky to build on top of. Performance WAAPI has a performance advantage because it can leverage a separate thread whereas JavaScript always runs on the main thread, right? Well, sort of. The only time a separate thread can be used is if transforms and/or opacity are the only things animating on a particular element (or else you run into synchronization issues). Plus there's overhead involved in managing that thread which can also get bogged down. There are tradeoffs either way. Having access to a different thread is fantastic even if it only applies in certain situations. That's probably the biggest reason I wanted to leverage WAAPI originally, but the limitations and tradeoffs are pretty significant, at least as it pertains to our goals with GSAP. Surprisingly, according to my tests GSAP was often faster than WAAPI. For example, in this speed test WAAPI didn't perform as well as GSAP on most devices I tried. Maybe performance will improve over time, but for now be sure to test to ensure that WAAPI is performing well for your animations. File Size To ensure compatibility, GSAP would need all of its current (non-WAAPI) code in place for fallbacks (most browsers won't fully support WAAPI for years) and then we'd need to layer in all the WAAPI-specific code on top of that like conditional logic checking for compatible eases, sensing when the user is attempting something WAAPI can't support, tracking/stacking additive animations, etc. That means file size would actually be far worse if GSAP were built on WAAPI. Some have suggested creating a different adapter/renderer for each tech, like a WebAnimationsAdapter. That way, we could segregate the logic and folks could just load it if they needed it which is clever but it doesn't really solve the problem. For example, some plugins may affect particular CSS properties or attributes, and at some point conditional logic would have to run to say "oh, if they're using the WebAnimationsAdapter, this part won't work so handle it differently". That conditional logic generally makes the most sense to have in the plugin itself (otherwise the adapter file would fill up with extra logic for every possible plugin, bloating file size unnecessarily and separating plugin logic from the plugin itself). So then if anyone uses that plugin, they'd pay a price for that extra logic that's along for the ride. Weighing the Pros & Cons At the end of the day, the list of "pros" must outweigh the "cons" for this to work, and currently that list is quite lopsided. I'd love to find a way to leverage any of the strengths of WAAPI inside GSAP for sure, but it just doesn't seem feasible or beneficial overall. The main benefit I see in using WAAPI inside GSAP is to get the off-the-main-thread-transforms juice but even that only seems useful in relatively uncommon scenarios, and it comes at a very high price. I'm struggling to find another compelling reason to build on WAAPI; GSAP already does everything WAAPI does plus a lot more. I'm hopeful that some of the WAAPI benefits will someday be possible directly in JS so that GSAP wouldn't have to create a dependency on WAAPI to get those. For example, browsers could expose an API that'd let developers tap into that off-the-main-thread transform performance. Ideally, browsers would also fix that hacky matrix()/matrix3d() string-based API and provide a way to set the numeric matrix values directly - that'd probably deliver a nice speed boost. Please chime in if I'm missing something, though. (Contact us or post in the forums) Why use GSAP even if/when WAAPI gets full browser support? Browser bugs/inconsistencies Lots of extra features like morphing, physics, Bezier tweening, text tweening, etc. Infinite easing options (Bounce, Elastic, Rough, SlowMo, ExpoScaleEase, Wiggle, Custom) Independent transform components (position, scale, rotation, etc.) Animate literally any property of any object (not just DOM) Timeline nesting (workflow) GSDevTools Relative values and overwrite management from() tweens are much easier - you don't need to get the current values yourself Familiar API Why WAAPI might be worth a try If you don’t need broad browser support today or any of GSAP’s unique features, you could save some kb by using WAAPI Solid performance, especially for transforms and opacity Always free Again, the goal of this article is NOT to criticize WAAPI at all. I think it's a great step forward for browsers. I just wanted to explain some of the challenges that prevent us from using it under the hood in GSAP, at least as it stands today. EDIT: Brian Birtles, one of the primary authors of the WAAPI spec, reached out and offered to work through the issues and try to find solutions (some of which may involve editing the spec itself) which is great. Rachel Nabors has also worked to connect people and find solutions. Although it may take years before it's realistic to consider building on WAAPI, it's reassuring to have so much support from leaders in the industry who are working hard to move animation forward on the web.
  14. GreenSock

    GSAP 1.20.0 Released

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Here are some of the highlights of the GSAP 1.20.0 release... yoyoEase Now you can specify an ease for the yoyo (backwards) portion of a repeating TweenMax animation. Set it to a specific ease like yoyoEase:Power2.easeOut or to flip the existing ease, use the shortcut yoyoEase:true. TweenMax is smart enough to automatically set yoyo:true if you define a yoyoEase, so there's less code for you to write. Score! Animate CSS Variables (custom properties) See the Pen CSS Variables Demo by GreenSock (@GreenSock) on CodePen. Emoji support in TextPlugin 'Nuf said. ...and more There are quite a few little improvements and bug fixes as well, which are listed in the changelog at the github repository. Download GSAP today. Happy tweening!
  15. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Have you ever tried getting a realistic wiggle effect or tweaking just how bouncy an ease is? What about adding squash and stretch to a bounce? These are not easy tasks. Well, until now. Even though CustomEase, lets you create literally any easing effect that you can imagine (bounces, wiggles, elastic effects, whatever) by drawing them, it's difficult to plot a complex wiggle or bounce while making sure all the points are spaced correctly. Wouldn't it be nice if you could just set a few parameters (like number of wiggles or bounciness) and have that complex easing curve created for you? Wish granted. CustomWiggle CustomWiggle extends CustomEase (think of it like a wrapper that creates a CustomEase under the hood based on the variables you pass in), allowing you to not only set the number of wiggles, but also the type of wiggle (there are 5 types; see demo below). Advanced users can even alter the plotting of the wiggle curves along either axis using amplitudeEase and timingEase special properties (see the docs for details). Demo: CustomWiggle Types See the Pen CustomWiggle Demo : resized by GreenSock (@GreenSock) on CodePen. Options wiggles (Integer) - number of oscillations back and forth. Default: 10 type (String) "easeOut" | "easeInOut" | "anticipate" | "uniform" | "random" - the type (or style) of wiggle (see demo above). Default: "easeOut" amplitudeEase (Ease) - provides advanced control over the shape of the amplitude (y-axis in the ease visualizer). You define an ease that controls the amplitude's progress from 1 toward 0 over the course of the tween. Defining an amplitudeEase (or timingEase) will override the "type" (think of the 5 "types" as convenient presets for amplitudeEase and timingEase combinations). See the example codepen to play around and visualize how it works. timingEase (Ease) - provides advanced control over how the waves are plotted over time (x-axis in the ease visualizer). Defining an timingEase (or amplitudeEase) will override the "type" (think of the 5 "types" as convenient presets for amplitudeEase and timingEase combinations). See the example codepen to play around and visualize how it works. How do you control the strength of the wiggle (or how far it goes)? Simply by setting the tween property values themselves. For example, a wiggle to rotation:30 would be stronger than rotation:10. Remember, an ease just controls the ratio of movement toward whatever value you supply for each property in your tween. Sample code //Create a wiggle with 6 oscillations (default type:"easeOut") CustomWiggle.create("myWiggle", {wiggles:6}); //now use it in an ease. "rotation" will wiggle to 30 and back just as much in the opposite direction, ending where it began. TweenMax.to(".class", 2, {rotation:30, ease:"myWiggle"}); //Create a 10-wiggle anticipation ease: CustomWiggle.create("funWiggle", {wiggles:10, type:"anticipate"}); TweenMax.to(".class", 2, {rotation:30, ease:"funWiggle"}); Wiggling isn't just for "rotation"; you can use it for any property. For example, you could create a swarm effect by using just 2 randomized wiggle tweens on "x" and "y", as demonstrated here. CustomBounce GSAP always had the tried-and-true Bounce.easeOut, but there was no way to customize how "bouncy" it was, nor could you get a synchronized squash and stretch effect during the bounce because: The "bounce" ease needs to stick to the ground momentarily at the point of the bounce while the squashing occurs. Bounce.easeOut offers no such customization. There was no way to create the corresponding [synchronized] scaleX/scaleY ease for the squashing/stretching. CustomEase solves this now, but it'd still be very difficult to manually draw that ease with all the points lined up in the right spots to match up with the bounces. With CustomBounce, you can set a few parameters and it'll create BOTH CustomEases for you (one for the bounce, and one [optionally] for the squash/stretch). Again, think of CustomBounce like a wrapper that creates a CustomEase under the hood based on the variables you pass in. Options strength (Number) - a number between 0 and 1 that determines how "bouncy" the ease is, so 0.9 will have a lot more bounces than 0.3. Default: 0.7 endAtStart (Boolean) - if true, the ease will end back where it started, allowing you to get an effect like an object sitting on the ground, leaping into the air, and bouncing back down to a stop. Default: false squash (Number) - controls how long the squash should last (the gap between bounces, when it appears "stuck"). Typically 2 is a good number, but 4 (as an example) would make the squash longer in relation to the rest of the ease. Default: 0 squashID (String) - the ID that should be assigned to the squash ease. The default is whatever the ID of the bounce is plus "-squash" appended to the end. For example, CustomBounce.create("hop", {strength:0.6, squash:2}) would default to a squash ease ID of "hop-squash". How do you get the bounce and the squash/stretch to work together? You'd use two tweens; one for the position ("y"), and the other for the scaleX/scaleY, with both running at the same time: //Create a custom bounce ease: CustomBounce.create("myBounce", {strength:0.6, squash:3, squashID:"myBounce-squash"}); //do the bounce by affecting the "y" property. TweenMax.from(".class", 2, {y:-200, ease:"myBounce"}); //and do the squash/stretch at the same time: TweenMax.to(".class", 2, {scaleX:140, scaleY:60, ease:"myBounce-squash", transformOrigin:"center bottom"}); See the Pen CustomBounce from GreenSock by GreenSock (@GreenSock) on CodePen. Where can I get it? CustomWiggle and CustomBounce are membership benefits of Club GreenSock ("Shockingly Green" and "Business Green" levels). It's our way of saying "thanks" to those who support GreenSock's ongoing efforts. Joining Club GreenSock gets you a bunch of other bonus plugins and tools like MorphSVGPlugin as well, so check out greensock.com/club/ for details and sign up today.
  16. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Club GreenSock members get a fresh batch of superpowers with updates to SplitText and ScrambleText, plus two brand new customizable eases in this 1st-Quarter 2017 update! It's our way of saying "thanks" to those who support our ongoing efforts. Let's dig right into the upgrades... SplitText SplitText now supports nested tags like <span>, <strong>, <em>, <p>, etc. This means you can split text with various styling and even links. To make things even cooler, SplitText now supports emoji characters ! SplitText demo See the Pen BzmGba by GreenSock (@GreenSock) on CodePen. "Simply Green" gets ScrambleText We moved ScrambleText into "Simply Green" membership level to deliver even more value. NEW: CustomWiggle and CustomBounce Add wiggle and bounce effects to your GSAP animations with these brand new, highly customizable eases. Even get squash and stretch! CustomWiggle and CustomBounce are now included for anyone with a "Shocking Green" or "Business Green" membership. To learn more visit greensock.com/wiggle-bounce. Thanks We're incredibly grateful to each and every Club GreenSock member, as we simply couldn't do what we do without your ongoing support. It's a privilege to have such a top-notch community around GSAP. Please feel free to plug in even more by participating in the forums to help others or to get your questions answered. It's a fantastic place to learn and be inspired. Enjoy the fresh updates, and happy tweening! [loginwidget]
  17. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Chrome 53 debuted a new "feature" to improve animation performance and graphics fidelity, but it had some nasty side effects that caused quite a few animators to get unpleasant phone calls from angry clients whose ads and web sites suddenly looked blurry and/or stuttery. Every other browser (including previous versions of Chrome) render the same animation beautifully. Chrome's new behavior may also result in WORSE animation performance. A lengthy discussion with the Chrome team revealed some disturbing tradeoffs that animators need to know about, and that could spell trouble with other browsers too unless we band together as a community and make our voices heard. At the heart of the controversy is the will-change CSS property. What is "will-change"? It gives developers a way to say "hey, browser, I'm gonna animate this property, so please do whatever you can to prepare and make it happen smoothly" which often means creating a compositor layer to get GPU-acceleration of transforms and opacity. Think of a compositor layer like a screen-shot of the element that the browser can store on the GPU to move/scale/rotate cheaply instead of re-computing all the pixels on each screen refresh. Read Sara Soueidan's excellent in-depth article here for details. Problem: blurry, stuttering animations What is Chrome 53 doing differently? Chrome is basically saying "In the past, I intelligently managed when and how to rasterize elements, but now that will-change property exists, I'll just make that serve as a blind toggle switch for rasterization instead. If things look blurry, it's not my problem - the developer will need to jump through some hoops (described below) to make things look sharp again." It all boils down to how and when "rasterization" of an element occurs (changing it into pixels stored on the GPU). If rasterization happens when the element is very small, it will be lower resolution. When scaled up, it'll look blurry/pixelated. On the other hand, if you rasterize while it's at its native scale (1) or above, you'll get a much higher-quality image with more pixels. Another key factor is how it is rasterized. Apparently Chrome uses a completely different algorithm for rasterizing an <img> than a <div> with a background-image even though both use identical source files and are sized the same! Here's an example of how they look in Chrome 53: Update: The Chrome team says they've fixed the bug that caused background-image to render differently than <img> (issue 649046) and it should be in the 9/29 release of Chrome Canary. Both factors (the when and the how) are at play in Chrome 53's new behavior (which apparently was a purposeful engineering choice based on will-change). According to this document, all content now gets re-rasterized when its scale changes (which happens up to 60 times per second during animation of scale/scaleX/scaleY properties). That's supposed to keep things sharp, but in this case Chrome's background-image algorithm applies some sort of pixel-snapping which causes that odd vibration during animation. (Update: should be fixed soon). This re-rasterization comes at a cost performance-wise too. Previously, Chrome applied some heuristics to sense when it was appropriate to re-rasterize to avoid blurriness, thus it only kicked in when necessary. But now, you must opt-in to get the layerizing benefits by setting will-change: transform. The Chrome team says this is an "improvement" because it puts the control into the hands of developers, but clearly this shift in behavior comes at quite a price. Overnight, the rug got pulled out from under many animations around the web, hurting performance (due to the constant re-rasterizing by default) and also introducing those visual vibrations when scaling background-image graphics (quite common for sprite sheets). To be clear, this primarily affected scaling animations, not ALL animations on the web. And of course anything where a background-image was used and the element was layerized (making it blurry in Chrome 53). Partial solution: set will-change: transform Complaints rolled in quickly, and the Chrome team suggested that developers go back and edit all their affected animations by adding will-change: transform which would layerize/rasterize those elements (skipping re-rasterizing on every refresh). It's a bit of a nightmare to go back and find all the affected animations and make the necessary edits, but hey, it's just adding one property to the CSS so it shouldn't be too bad, right? Oops, that breaks it in other ways Chrome chose to implement will-change such that it will trigger rasterization at whatever the current scale happens to be, so if you've got an element that starts at scale(0.1) and animates up to scale(1), rasterization happens at scale(0.1), thus it will look terrible (blurry/pixelated) at the end of the animation. Here's an example showing the SAME image animating to identical scales, but flip-flopped starting/ending values: (View the codepen here) Partial solution: toggle will-change back and forth Hold your nose...here comes the hack. In order to trigger re-rasterization of the element to keep it clear, the Chrome team suggested toggling will-change back to auto during the animation, then waiting until a requestAnimationFrame elapses before setting it back to transform...and then doing it again, and again, at whatever frequency the developer wants in order to keep things acceptably sharp. So will-change: auto is being pressed into service to explicitly tell the browser "rasterize me on the next requestAnimationFrame." Yes, you read that correctly: animators must turn **off** the very property whose entire purpose is to be **on** for animation, signaling change. Then toggle it back-and-forth many times during the animation. So we're essentially telling the browser "I'm gonna change this...no I'm not...yes I am...nope..." all while in the process of animating. This doesn't exactly sound consistent with the intent of will-change, nor does it seem performant (Google's document says "Be aware, however, that there is often a large one-time performance cost to adding or removing will-change: transform.") Gotcha: never de-layerize Even if you're willing to follow the advice to set will-change: transform and toggle back-and-forth during the animation to maintain a reasonable level of clarity, there's one last gotcha - if you set it back to will-change: auto at the end of the animation and give it a non-3d transform (to de-layerize it), you'll see a jarring shift in pixels and clarity for anything with a background-image! The Chrome team advises in that case that you make sure it always has a 3d transform thereafter to prevent it from de-layerizing. Following that advice puts you at risk of running out of memory (or hitting performance problems), plus the background-image will always be slightly blurry. Here's what it looks like to toggle between the two modes at the end of the animation: Update: The Chrome team clarified that this was a temporary fix, not a long-term solution. The background-image rendering bug should be resolved soon, and this "never de-layerize" suggestion will no longer apply at that point. The bigger issue, beyond Chrome... The will-change spec doesn't really specify implementation details which means that Chrome's new behavior may be completely unique; Firefox might do something different, and then there's Edge, Safari, Opera, Android, etc. Perhaps Chrome requires that developers toggle back-and-forth to maintain clarity, but what if Firefox interprets that differently, or imposes a big performance penalty when doing the same thing? What if developers must resort to various [potentially conflicting] hacks for each browser, bloating their code and causing all sorts of headaches. We may have to resort to user agent sniffing again (did you just throw up a little in your mouth?). This will-change property that was intended to SOLVE problems for animators may end up doing the opposite. It seems wise for the browsers to step back and let the spec authors fill in the implementation details and gain consensus before moving forward. Another problem: stacking contexts As mentioned in this article, will-change can also affect the stacking context of elements, leading to unintended changes in how things render/stack on your page. So your content may stack differently in browsers that do support will-change than those that don't. More sniffing, yay! To summarize: Before Chrome 53 Just animate stuff. No need to jump through any hoops as a developer to get decent clarity (though the Chrome team points out that there was still some blurriness in certain edge cases that they've heard complaints about). After Chrome 53 Make sure to set will-change: transform if you're animating transforms and want to opt-in to performance optimizations and avoid jittery background-image scaling. But be careful about how it might affect stacking contexts, and keep checking when other browsers decide to implement will-change, as it could change how your content looks. If you're scaling up, make sure you toggle will-change back-and-forth to/from auto during the animation to maintain clarity (but sacrifice performance). Make sure there's a 3D transform applied throughout to prevent de-layerization (which would cause a big performance hit). Don't switch back to a 2D transform at the end (at least for elements with a background-image), or you'll see a jarring pixel shift. (Update: should be fixed soon in Chrome, so this step won't be necessary at some point.) Don't forget to go back and find/fix existing animations that are affected by the new Chrome behavior. Is Chrome going to fix this? As of today, the Chrome team says they've thought a lot about this and feel pretty strongly that the new behavior is an improvement, so there's no plan to change it (that we know of at least). Here are the solutions we proposed (with the answers we got): Instead of putting the burden on developers to manually toggle will-change back-and-forth between transform and auto during the animation, just have the browser natively sense when re-rasterization is prudent and do that automatically which would be much faster than JS anyway. It seems rather trivial for the browser to sense when an element has been scaled greater than a certain delta (like 0.2) and trigger a rasterization. Chrome team's answer (summary): "that's too hard (complex). The browser might get it wrong sometimes, so it's better to have developers do it at the JS level. And JS isn't that much slower than native. It's just a small amount of extra work for animators (or library developers)." The browser could always perform rasterization at native size (scale of 1) or the current scale, whichever is bigger. That way, nobody would run into those nasty blurred images when scaling up from a small value to 1 (pretty common) and there's no need to keep re-rasterizing. Chrome team's answer: "rastering at native size and then scaling that down with bilinear filters in the compositor to something less than 0.5 or so will start to loop noticeably bad." If the goal is to put control into developers' hands, why not expose an API for defining what scale rasterization should occur at, like element.cacheTransform = "scale(1)"? Chrome team's answer: "it may not be so easy to get it right in terms of expressiveness, and requires new APIs...and also to define what raster scale means, which seems quite tricky in general, especially while not over-fitting to current implementation strategies. That might happen later on." The browser should use the same algorithm to rasterize (and scale) anything. The one being used by Chrome for <img> looks great so please use that for background-image too Chrome team's answer (summary): "Acknowledged. We're working on a fix." Instead of turning will-change into a convoluted way to control rasterization in the browser and risk opening a can of worms with other browsers doing things completely differently due to vague specs, roll back the behavior and work with the spec authors to define implementation details and re-approach later when consensus is reached. Chrome team's answer: "the intention of will-change is to give a hint to the browser that the referenced property is going to be animated, and for the browser to take steps to optimize performance for that use case. This is why will-change: transform creates a composited layer: because animating transform afterward will therefore not later have the startup cost and per-frame of creating the composited layer and rasterizing it. Following this logic, further extending the meaning of will-change: transform to not re-raster on scale change is similar, because it will make it faster." Can GSAP fix it for me? Yes and no. We've already experimented with the suggestions that the Chrome team made, but there are a few tricky challenges. First, we're hyper-focused on performance so it's quite painful to have this new Chrome behavior force us to add extra logic that must run on every tick of every tween of any transform-related animation. It probably wouldn't be noticeable unless you're animating hundreds or thousands of elements simultaneously, but we built GSAP to handle crazy amounts of stress because sometimes that's what a project requires, so we're pretty frustrated by Chrome's decision to impose this burden on animators and libraries like GSAP. But yes, we could do the toggling under the hood automatically and accept the performance tradeoff. But another major problem that's totally in the hands of browsers is rendering - we can't fix that jarring pixel shift at the end of the animations of background-image. We can force the 3D transform to remain, but as described above, that leaves things blurry and unnecessarily eats up memory. We work very hard to implement workarounds for browser inconsistencies and bugs like this, but we can't work miracles. We really need Chrome to step up and provide some better solutions. Conclusion There's no doubt that the Chrome team is working hard to move the web forward and deliver the best experience for their users. At GreenSock, Chrome is our primary browser that we use every day, so we're big fans. This article isn't intended to criticize anyone, but rather to bring attention to something that could spell big trouble for animators in the days ahead, beyond the headaches Chrome 53 caused with its new behavior. Hopefully Chrome will roll back the changes and/or implement some of the suggestions above. We'd encourage folks to make their voices heard (on the Chrome thread, below in the comments, with the spec authors, etc.). Perhaps we got something wrong - feel free to correct us or make other suggestions. Ultimately we want to help move animation forward on the web, so please join us.
  18. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Are your animations meant to feel playful? Robotic? Slick? Realistic? If they had a voice, what would they sound like? To become an animation rock star, you must develop a keen sense of easing because that's what determines the style of movement between point A and point B. GreenSock's new CustomEase frees you from the limitations of canned easing options. Create literally any ease imaginable. Zero limitations. CSS animations and WAAPI offer cubic-bezier() which is great but with only two control points it's impossible to create more complex effects like bouncing, elastic, wiggles, rough/jerky eases, etc. Plus you can't make an ease return to its starting values (like a ball jumping into the air and falling back to the ground with a bounce). Features Unlimited anchors and control points. Copy/Paste any SVG <path> (including direct copy/paste from Adobe Illustrator). Use CSS cubic-bezier() values (For example, from cubic-bezier.com). Editor has snapping, undo, sample code and other conveniences. Start with any standard ease and customize it. getSVGData() method turns any ease into SVG <path> data for display at the size you define. Extremely optimized for runtime performance. Free for anyone with a GreenSock account. Reading Ease Curves, Editing, and Using CustomEase Here's an in-depth video tour that'll get you up to speed with exactly how to use CustomEase: Ready to play? Check out the new Ease Visualizer with CustomEase support. Click "Custom" to edit the curve as much as you want: Simple Example See the Pen Video: Single Tween with CustomEase by GreenSock (@GreenSock) on CodePen.&#13;We strongly recommend creating your CustomEases initially (rather than in each tween) to maximize performance and readability. You then reference them by ID in your tweening code. When an ease is created, it must parse through the points and do various calculations to prepare for blisteringly fast runtime performance during the animation, so executing those calculations when your page/app loads is typically best. Download CustomEase To get CustomEase, you must have a GreenSock account which is completely free to set up. Plus it gets you access to our community forums (a fantastic place to learn and get your questions answered). The widget below lets you sign up or if you're already logged in, it'll give you immediate access to the download zip that contains CustomEase in the "easing" directory. Note: CustomEase is not in the github repository or CDN; it's only available for download at GreenSock.com. [loginwidget]
  19. GreenSock

    GSAP 1.19.0 Released

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. GSAP version 1.19.0 introduces some exciting new features for advanced users as well as conveniences for everyone (even the "greenest" novices). The most noteworthy improvements are summarized below: Function-based values Instead of a number (x:100) or string (width:"300px") or relative value (y:"+=50"), you can now define most values as a function that'll get called once for each target the first time the tween renders, and whatever is returned by that function will be used as the value. This can be very useful for randomizing things or applying conditional logic. See it in action in the demos below. See the Pen BzmGba by GreenSock (@GreenSock) on CodePen. ...and more GSAP 1.19.0 is more ES6-friendly (for example, you can npm install gsap and then import {TweenLite, Elastic, TimelineMax} from "gsap" in your project). Plenty of bug fixes too. See the whole list in the github changelog. DOWNLOAD GSAP TODAY Happy tweening!
  20. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Have you ever wondered why GreenSock doesn't use a more common open source license like MIT? Sometimes our licensing model is misunderstood but hopefully after reading this article you'll see why it is so foundational to the success of our tools and why it ultimately benefits users too. Open source is awesome! If you had to write and maintain your own jQuery or React or GSAP, could you do it? Would it be as refined and reliable? Probably not. How many times have you found a library or chunk of code on github that saved you hours of development time? Open source can be a quick path to great results. It also serves as a jumping-off point for up-and-coming developers to share their innovation, inspiring others to write better code. Open source is easily one of the most influential movements in the entire development community. We're certainly not anti-open-source. Quite the contrary. Open source is *not* always awesome Despite its strengths, there are some dark sides to open source. Many projects are riddled with bugs, poorly documented, and sometimes even dangerous to use. The web is littered with abandoned projects that once seemed promising. It's like a clearance bin you'd find at a discount store; there may be some treasures in there, but you'll have to dig through a lot of undesirables to find the gems. In an industry that's inundated weekly with "hot new" libraries, all just a click away for free, it can be tough to figure out which ones to gamble on. Commitment required(?) Some libraries are one-trick ponies that don't require ongoing commitment. For example, a math library that performs matrix operations or a formatting library. If the author abandons the project, it's no big deal. Other projects, like a full-featured animation library, are much more complex and leverage browser-level optimizations that are moving targets. Vendor-specific bugs need to be worked around or new browser features get introduced that beg to be animated. Plus, animation is the most performance-sensitive aspect of the user experience, so a commitment to ongoing optimization pays dividends. Beyond the code itself, what about community, documentation and examples? These become increasingly important as a library's feature set expands and companies standardize on it, needing to train new staff. Again, some projects have very little need for ongoing support but for GreenSock, it seemed essential. Hampered by success Paradoxically, success is the very thing that kills many open source projects because they don't have a funding mechanism to underwrite all the demands. The project that was once the twinkle in the author's eyes often ends up being a thorn in their side. They can't afford (or don't really want) to keep up with the demands. That's not to say that all open source projects suffer this fate. We have the utmost respect for open source authors, and we don't mean to diminish anyone's hard work or generosity. But there are some common frailties of open source projects in general that GreenSock aims to avoid. Having built and maintained a popular library for over a decade, we've learned that one of the most important factors in keeping a complex project like GSAP vibrant is the licensing model. Our goal was to make GreenSock tools not only accessible (which MIT does a great job of), but also sustainable, business-friendly, consistent, and respectful. We needed a license that would have the best chance of facilitating those goals, as described below: Sustainable Scores of animation libraries have come and gone over the years. We didn't want to be just another flash in the pan that ultimately leaves users feeling abandoned. Trust is paramount for us. We wanted the GreenSock brand to be associated with an exceptionally high level of commitment and reliability. Earning that trust requires a consistent, full-time effort so we considered these funding models: Self-funded - most open source projects are self-funded, meaning that the authors cover all the costs themselves, typically by donating their time and resources. It's noble and perfectly adequate for many projects. An MIT (or similar) license is a great fit because it allows an author to share code with almost zero strings attached. However, the commitment level tends to be unreliable and self-funded projects are rarely sustained long-term. With our particular project and goals, this wasn't a good fit. Corporate sponsorship - sometimes huge companies like Adobe, Microsoft, Facebook, or Google are willing to contribute funds to encourage a project. They usually have a vested interest in its success. For example, Adobe helps fund CreateJS which is a set of libraries that its very own Adobe Animate (formerly Flash) relies on. React is underwritten by Facebook. This can be a great way to offload development costs onto some deep-pocketed corporations, keeping it totally free for end users. The risk, however, is that if the project goals don't line up with the corporation's agenda (which can shift), funding gets yanked or the developers get pressured to go in a direction that may not be good for end users. If the company has a bad year, they may re-allocate resources. The project is ultimately beholden to a few key sponsors with potentially conflicting objectives. This wasn't something we were comfortable with although we acknowledge that it's a great solution for certain projects. Private investors - famo.us is probably the most well-known example of an "open source" project that took on private investors. A few years and $30,000,000+ later, it stopped development of its open source library and laid off a large chunk of its staff, deciding to "pivot" in a more profitable commercial direction. Private investors want a return on their investment (which is completely understandable) but an MIT license can make that very difficult because it leaves the IP (intellectual property) wide open for anyone to steal, including competitors. Similar to corporate sponsorship, projects who get their funding this way are beholden to a few key stakeholders who may have a very different agenda than end users. Again, this wasn't an ideal fit for GreenSock. User-funded - when funding comes directly from end users, it creates a wider base (more stable) and incentivizes the kind of innovation that end users actually care about, otherwise funding naturally dries up. That's a healthy dynamic for aligning agendas. Rather than serving a small set of outside investors looking for a return or a corporation with profit centers to bolster, end users play the central role. The downside, of course, is that certain features or use cases involve a fee. That can be a tough pill to swallow for some, especially when "free" MIT-licensed options abound. And it takes time to build up a wide base of users who literally "buy in". Trust and longevity are key. But a surprising number of users embrace this model because it allows them to "vote" with their dollars and participate in making a product they love continue to thrive. While this model certainly isn't for everyone, it has been a good fit for GreenSock. Accessible Sometimes we hear comments like "you can't use GreenSock in commercial projects without a license." WRONG. [loud buzzer noise]. Our license was designed to make the tools extremely accessible, even permitting usage in one-off commercial projects (where you get paid a one-time fee by a single client). And of course it's free to use in non-commercial projects (see licensing page for details). That way, a certain breed of power-user provides the funding that benefits everyone. An estimated 95%+ of our users never pay us a dime. So while a rare type of commercial project does require a "Business Green" Club GreenSock membership (which covers an unlimited number of projects while active), the vast majority of users never need that special license. This accessibility was a cornerstone of our approach. We didn't want to hide all the tools behind an intimidating paywall or make all commercial uses trigger a fee. Yet it couldn't be as unrestrained as MIT because that would create vulnerabilities for us and our users (as described in this article). Another way we keep the core tools accessible is by freely exposing the raw source code both on github and in our downloads. Users can peek under the hood and see how things work. That makes troubleshooting and learning much easier. We tried to strike a balance of openness and healthy insulation from the frailties of MIT. Business-friendly Most businesses are very concerned about IP infringement, lawsuits, and indemnification. The "no strings attached and no warranties" nature of MIT is both a strength and a weakness. It simplifies sharing, but what if an open source library leverages someone else's IP? What if it uses "copyleft" code that infects anything it touches, requiring that all projects using it be open-sourced as well? That could be a huge problem for businesses with proprietary tools in a competitive market. GreenSock's license doesn't have any attribution requirements, nor does it impose share-alike rules like GNU and Creative Commons. Furthermore, it contains warranties that aren't found in MIT-like licenses, making GreenSock more business-friendly. It survived the software audits and legal review process at reputable companies like Google, Sony, EA, Intel, every major ad network, and many others. This vetting is necessary in the business world where there is so much at stake. The license also allows for code edits to be made for bug fixes. Typically that's not necessary because we handle it as a part of our ongoing support efforts, but businesses appreciate knowing that if we relaxed those efforts, they'd still be able to get their project working if they ran into a bug and needed to squash it themselves. Consistent MIT-licensed projects spread on github where it's trivial to fork them and start making custom flavors. That's ideal for authors whose goal is to start something and then step back to let the community run with it. But that can lead to a lot of confusion as different flavors start popping up with incongruent feature sets and incompatibilities. Focus and direction are easily lost. If there's no driver (or too many drivers), it can be a scary ride for the passengers. We wanted the GreenSock brand to convey a certain level of consistency and reliability. That's part of the reason we don't generally accept pull requests - we keep a tight reign on the codebase so that we are intimately aware of every piece. That allows us to not only support it, but also stand behind our IP warranties. Respectful We believe that if we respect our users, they'll generally reciprocate that respect. Most people want to do the right thing. So we don't inject "phone home" code that reports usage or causes things to suddenly stop working when a membership expires. We don't force business customers register each user or enter serial numbers to activate seats. We don't limit installations or the number of projects that the license covers. We don't burn extra energy policing usage. We've never sued anyone. We funnel our energy into refining the tools, innovating, educating, and supporting our users. We put a lot of effort into creating a positive, respectful culture in the forums which boast over 50,000 members and 80,000 posts. We don't charge a dime for support there, and we don't shamelessly promote Club GreenSock memberships. Again, we trust that if we keep trying to provide value, people will notice and gladly sign up to support the efforts at some point. An unintended benefit of our licensing model has been that it naturally weeds out users who expect everything for free and don't recognize the substantial effort that goes into these projects. We're left with users who tend to be very respectful and trustworthy (exactly who we like to serve). Conclusion GreenSock isn't the typical open source project. Our licensing model reflects that. It offers a blend of sustainability, accessibility, business-friendliness, consistency, and respect that'd be very difficult (or impossible) to accomplish with an MIT-like license. It's not necessarily "better" (open source is fantastic, really) but in our particular case it aligned more closely with the project goals. In fact, many companies have chosen GreenSock because of the license, not in spite of it. They wanted to invest in a platform that had a certain level of commitment behind it that's rare in the open source world. After a decade, the experiment seems to be working and we have our supporters to thank for that. We've been humbled and inspired by Club GreenSock members throughout the years. It's a privilege to create these tools and serve the community. We're grateful for their partnership which makes it all possible.
  21. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Since launching MorphSVGPlugin, we've made a bunch of improvements and exposed several new features. Here are the highlights... The challenge Before we dive into solutions, it helps to understand the tasks that MorphSVGPlugin must perform in order to work its magic: Convert the path data string into pure cubic Beziers Map all of the segments between the start and end shapes (match them up), typically based on size and position If there are more segments in one than the other, fabricate new segments and place them appropriately Subdivide any segments with mis-matching point quantities If a shapeIndex number isn't defined, locate the one that delivers the smoothest interpolation (shortest overall distance that points must travel). This involves looping through all the anchor points and comparing distances. Convert all the data back into a string Isolate the points that need to animate/change and organize a data structure to optimize processing during the tween. That may sound like a lot of work (and it is) but MorphSVGPlugin usually rips through it with blazing speed. However, if you've got a particularly complex path, you'll appreciate the recent improvements and the new advanced options: Performance tip #1: define a shapeIndex MorphSVGPlugin's default shapeIndex:"auto" does a bunch of calculations to reorganize the points so that they match up in a natural way but if you define a numeric shapeIndex (like shapeIndex:5) it skips those calculations. Each segment inside a path needs a shapeIndex, so multiple values are passed in an array like shapeIndex:[5,1,-8,2]. But how would you know what numbers to pass in? The findShapeIndex() tool helps for single-segment paths, what about multi-segment paths? It's a pretty complex thing to provide a GUI for. Typically the default "auto" mode works great but the goal here is to avoid the calculations, so there is a new "log" value that will act just like "auto" but it will also console.log() the shapeIndex value(s). That way, you can run the tween in the browser once and look in your console and see the numbers that "auto" mode would produce. Then it's simply a matter of copying and pasting that value into your tween where "log" was previously. For example: TweenMax.to("#id", 1, {morphSVG:{shape:"#otherID", shapeIndex:"log"}}); //logs a value like "shapeIndex:[3]" //now you can grab the value from the console and drop it in... TweenMax.to("#id", 1, {morphSVG:{shape:"#otherID", shapeIndex:[3]}}); Notes shapeIndex:"log" was added in MorphSVGPlugin version 0.8.1. A single segment value can be defined as a number or a single-element array, like shapeIndex:3 or shapeIndex:[3] (both produce identical results) Any segments that don't have a shapeIndex defined will always use "auto" by default. For example, if you morph a 5-segment path and use shapeIndex:2, it will use 2 for the first segment and "auto" for the other four. Performance tip #2: precompile The biggest performance improvement comes from precompiling which involves having MorphSVGPlugin run all of its initial calculations listed above and then spit out an array with the transformed strings, logging them to the console where you can copy and paste them back into your tween. That way, when the tween begins it can just grab all the values directly instead of doing expensive calculations. For example: TweenMax.to("#id", 1, {morphSVG:{shape:"#otherID", precompile:"log"}}); //logs a value like precompile:["M0,0 C100,200 120,500 300,145 34,245 560,46","M0,0 C200,300 100,400 230,400 100,456 400,300"] //now you can grab the value from the console and drop it in... TweenMax.to("#id", 1, {morphSVG:{shape:"#otherID", precompile:["M0,0 C100,200 120,500 300,145 34,245 560,46","M0,0 C200,300 100,400 230,400 100,456 400,300"]}}); As an example, here's a really cool codepen by Dave Rupert before it was precompiled: http://codepen.io/davatron5000/pen/meNOqK/. Notice the very first time you click the toggle button, it may seem to jerk a bit because the entire brain is one path with many segments, and it must get matched up with all the letters and figure out the shapeIndex for each (expensive). By contrast, here's a fork of that pen that has precompile enabled: http://codepen.io/GreenSock/pen/MKevzM. You may noticed that it starts more smoothly. Notes precompile was added in MorphSVGPlugin version 0.8.1. Precompiling only improves the performance of the first (most expensive) render. If your entire morph is janky throughout the tween, it most likely has nothing to do with GSAP; your SVG may be too complex for the browser to render fast enough. In other words, the bottleneck is probably the browser's graphics rendering routines. Unfortunately, there's nothing GSAP can do about that and you'll need to simplify your SVG artwork and/or reduce the size at which it is displayed. The precompiled values are inclusive of shapeIndex adjustments. In other words, shapeIndex gets baked in. In most cases, you probably don't need to precompile; it's intended to be an advanced technique for squeezing every ounce of performance out of a very complex morph. If you alter the original start or end shape/artwork, make sure you precomple again so that the values reflect your changes. Better segment matching In version 0.8.1, there were several improvements made to the algorithm that matches up corresponding segments in the start and end shapes so that things just look more natural. So even without changing any of your code, loading the latest version may instantly make things match up better. map: "size" | "position" | "complexity" If the sub-segments inside your path aren't matching up the way you hoped between the start and end shapes, you can use the map special property to tell MorphSVGPlugin which algorithm to prioritize: "size" (the default) - attempts to match segments based on their overall size. If multiple segments are close in size, it'll use positional data to match them. This mode typically gives the most intuitive morphs. "position" - matches mostly based on position. "complexity" - matches purely based on the quantity of anchor points. This is the fastest algorithm and it can be used to "trick" things to match up by manually adding anchors in your SVG authoring tool so that the pieces that you want matched up contain the same number of anchors (though that's completely optional). TweenMax.to("#id", 1, {morphSVG:{shape:"#otherID", map:"complexity"}}); Notes map is completely optional. Typically the default mode works great. If none of the map modes get the segments to match up the way you want, it's probabaly best to just split your path into multiple paths and morph each one. That way, you get total control. Animate along an SVG path The new MorphSVGPlugin.pathDataToBezier() method converts SVG <path> data into an array of cubic Bezier points that can be fed directly into a BezierPlugin-based tween so that you can essentially use it as a motion guide. Watch the video Demo See the Pen pathDataToBezier() docs official by GreenSock (@GreenSock) on CodePen. Morph back to the original shape anytime If you morph a path into various other shapes, and then you want to morph it back to its original shape, it required saving the original path data as a variable and feeding it back in later. Not anymore. MorphSVGPlugin records the original path data in a "data-original" attribute directly on the element itself, and then if you use that element as the "shape" target, it will automatically grab the data from there. For example: TweenMax.to("#circle", 1, {morphSVG:"#hippo"}); //morphs to hippo TweenMax.to("#circle", 1, {morphSVG:"#camel"}); //morphs to camel TweenMax.to("#circle", 1, {morphSVG:"#circle"}); //morphs back to circle. Conclusion We continue to be amazed by the response to MorphSVGPlugin and the creative ways we see people using it. Hopefully these new features make it even more useful. How do I get MorphSVGPlugin? If you're a "Shockingly Green" or "Business Green" Club GreenSock member, just download the zip from your account dashboard or the download overlay on GSAP-related page on this site. If you haven't signed up for Club GreenSock yet, treat yourself today.
  22. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. Published: 2015-08-07 Google sparked an urgent and rather violent shift away from Flash technology when it announced that Chrome will pause "less important" Flash content starting as early as September 2015. Flash has served as the de facto standard for banner ads for more than a decade. Firefox also blocked Flash after major security issues were discovered and Facebook's security chief called for Adobe to kill Flash once and for all. Amazon says it will no longer accept any Flash ads after September 1. Clearly Flash is on its way out of web browsers. Advertisers can no longer afford its liabilities. Now what? Modern browsers are remarkably capable of handling slick animations natively using HTML, JavaScript, and CSS (collectively referred to as “HTML5” or just “H5”), making them the obvious choice as the tag-team successor to Flash. No more plugins. However, a few barriers are clogging up the transition. Some are technical, some are political, and some have to do with a glaring lack of information. Let's address things head-on, identify some solutions, and get things moving in the right direction. GreenSock has a rich heritage in the banner ad industry, serving as its most popular animation library in both Flash and HTML5. In fact, it’s one of the fastest-growing JavaScript tools on the entire Internet and it was originally born out of banner-specific needs. We obsess about animation in the browser, studying the technical challenges, performance benchmarks, and workflow. Consequently, we’re in a unique position to lend a hand during this transition and perhaps illuminate the path forward. 40 kilobytes? Are you kidding? Years ago, when bandwidth was a tiny fraction of what it is today, the ad industry codified a set of standards for banner ad file sizes. A common limit was 40kb (sometimes even 30kb) including all images, fonts, animations and scripts which Flash compressed into a single amazingly small swf file. Technically each publisher determines its own file size policies, but almost everyone looks to the IAB (Interactive Advertising Bureau) as a standards-setting body, like the W3C for web browsers. The IAB exists to help guide the industry but they don't mandate or enforce anything. When Flash ruled the banner ad landscape, certain file size specs were recommended by the IAB and the system worked well. However, the technology landscape has changed drastically. Bandwidth, page size, and banner budget over the yearsBandwidth (Mbps)Banner budget (kb)Page size (kb)2008200920102011201220132014201540kb33Mbps40kb1,795kb Year Bandwidth (Mbps) Banner budget (kb) Page size (kb) Jan 1, 2008 5.86 40 312 Jan 1, 2009 6.98 40 507 Jan 1, 2010 9.54 40 679 Jan 1, 2011 10.43 40 788 Jan 1, 2012 12.7 40 1081 Jan 1, 2013 15.62 40 1529 Jan 1, 2014 20.83 40 1622 Jan 1, 2015 32.78 40 1795 Page size (kb) Since 2008, average bandwidth has grown by a factor of 5.6 which is remarkably on-pace with the growth of the average web page size (5.7), but the IAB has been cautious about declaring HTML5 specs due to all the complexities involved. They released a set of HTML5 guidelines in 2013, but omitted any file size specs, saying only that HTML5 ads weigh "more" than swf ads. Without specs, many publishers clung to the safe limits of yesteryear. The gatekeepers who impose the 40kb budgets often do not have the authority or wherewithal to allow more than what the latest IAB spec dictates. Consequently, developers are forced to shoehorn HTML5 banners into archaic Flash specs which isn't what the IAB intended. This must change. From our vantage point, fear is driving the industry. Publishers and networks are afraid to raise the file size limits without IAB approval. Some do it anyway, but disagree on exactly how much, leading to wild variations. Developers have no choice but to build for the least common denominator in their ad campaign which is either totally unclear or ends up being the dreaded creativity-crushing 40kb. (UPDATE: The IAB released a draft of its new HTML5 specs.) HTML5 is fundamentally different...embrace that HTML5 banners often weigh 3-5 times as much as a Flash swf but far too many people myopically focus on the aggregate total file size. They miss the unique strengths of HTML5 technology that we should be exploiting - shared resources and browser caching. These have a tremendous impact on loading time and overall performance which is the whole point of the file size limits anyway! Flash compiled all assets into a single swf meaning that if 10 different banners on a site all used a certain library, it got baked into each and every swf. End users paid the file size price 10 times. Multiply that by millions of ads and it gets pretty crazy. In HTML5, however, a library can be dropped onto a CDN (content delivery network) and shared among all banners, thus end users only load it once and it’s completely "free" thereafter...for all ads pointing at that CDN...on all sites. This is a BIG deal. It means that common animation chores like the requestAnimationFrame loop, timing, sequencing, intelligent GPU layerizing, lag smoothing, compatibility workarounds, performance optimization, etc. can be extracted and shared among them all (much like what the Flash Player did for swf files). The unique banner-specific code can be much more concise, reducing overall load times and improving performance. File size limitations should be applied to the banner-specific assets, excluding the shared resources that drive common functionality. Imagine how silly it would have been if the 17MB Flash Player download was included in the aggregate file size for each swf banner. Ad networks and publishers can put a certain subset of tested-and-approved libraries onto their CDNs and exempt them from file size calculations. We're thrilled to see industry leaders like Advertising.com/AOL, Google DoubleClick, Flashtalking, and Sizmek already taking this approach with GSAP. This strategy allows developers to avoid burning hours manually cooking up their own proprietary libraries to fit within the ad specs. Ad networks and publishers win because load times (and costs) are lowered and it's easier to troubleshoot problems when a common toolset is used. They reap the benefits of all the compatibility and performance optimizations in tools like GSAP. End users get ads that perform better, load faster, and look more appealing. Animation technologies and approaches For those tasked with building HTML5 banners, the choices are perplexing. Is it best to use a visual IDE like Adobe Edge Animate, Google Web Designer, or Tumult Hype? Even Flash is capable of outputting HTML5 content. These tools can make building ads easier (especially for designers who don’t want to write code), but a common complaint is that the resulting output is bloated and slow, making them ill-suited for banner ads. Some networks explicitly state that they won't accept ads built with these tools. We'd love to see the visual tools mature and export concise, performant, ad-friendly code because plenty of designers aren't comfortable hand-coding banners yet. Ideally, they'd tap into GSAP under the hood so that designers and developers could collaborate on the same files without worrying about runtime redundancies. There are also network-specific banner-building tools but their proprietary nature makes them impractical for many campaigns. If an agency uses one network’s proprietary tool and then their client asks to run the ad on another network too, it must be rebuilt. Learning how to use each network's proprietary tool can be cumbersome. Hand-coded animations are usually much lighter-weight, performant, and universally accepted, but building them requires a particular skill set. And which underlying technologies should be used? CSS animations? jQuery? GSAP? CreateJS? Once again, answers vary wildly among ad networks and publishers. The goal of this article isn't to provide an in-depth review or comparison of the various tools. Each has its own strengths and weaknesses, but let's briefly touch on some of the major runtime animation technologies: CSS transitions and CSS animations - these are supported in all modern browsers, but not IE9 or earlier. They're cheap from a file size standpoint and they perform well. For simple animations like button rollovers, they're great. However, file size rises quickly and things get cumbersome when you attempt even moderately complex animations. Simply put, they will take longer to build, they won't work in some older browsers, there are bugs (particularly when animating SVG elements), and certain tasks are outright impossible. Additional reading: https://css-tricks.com/myth-busting-css-animations-vs-javascript/ and http://greensock.com/transitions/ and https://css-tricks.com/svg-animation-on-css-transforms/ jQuery - it was never intended to be a robust animation tool, so jQuery suffers from poor performance and workflow issues. Most ad networks strongly advise against using it. GSAP is up to 20x faster. Additional reading: http://greensock.com/jquery/ CreateJS - Adobe Flash can optionally export to this canvas-based library. You can't just publish existing Flash banners to CreateJS (you must do some conversion work and leverage JavaScript instead of ActionScript) but for designers who are already used to the Flash interface, this can be a boon. One down side to canvas-based libraries is that you lose accessibility (the browser sees it as essentially a blob of pixels), but that's probably not a top priority for banners. File size can also become a concern (possibly mitigated by CDN standardization). You can use GSAP to animate CreateJS content. Additional reading: http://createjs.com Zepto - like a lightweight version of jQuery that uses CSS transitions under the hood for animations. Zepto is better than jQuery for banners, but it suffers from similar workflow issues as well as the inconsistencies/bugs inherent in CSS transitions/animations (like with SVG transforms). Active development seems to have stalled. Additional reading: http://zeptojs.com Web Animations - a new spec being worked on that has a lot of promise, but it just isn't a realistic contender at this point because it is in flux and several browser vendors remain noncommittal about ever supporting it. The polyfill has performance problems. Additional reading: http://w3c.github.io/web-animations GSAP - Widely recognized as the performance leader, GSAP solves all kinds of real-world animation problems from browser inconsistencies to workflow headaches (far too many to go into here). The Flash banner ad community is full of designers and developers who use GSAP daily, making it much easier to transition to HTML5; no new syntax to learn. Ongoing development and support have a solid track record for over 7 years. Additional reading: http://greensock.com/why-gsap/ Recommendations Based on our experience and the results from our survey, we suggest the following: Standardize a few JavaScript libraries Ideally, the IAB would equip the community with a short list of recommended libraries that get CDN-ified and exempted from file size calculations. Historically, the IAB has been extremely reluctant to officially endorse any third party tools. That's understandable - it could be seen as playing favorites or unfairly excluding someone's favorite library. However, without specific recommendations, the HTML5 landscape is so fractured and complex that it will result in a free-for-all (which is basically what it is now). The IAB can set the tone and move the focus away from aggregate total file sizes and into the modern era that leverages shared resources and browser caching to deliver excellent performance. It is imperative that this list of "recommended" libraries be very short, otherwise the caching impact will be diluted. The IAB can run their own independent tests and look at performance, features, compatibility, support, workflow benefits, and overall industry demand to determine which libraries get recommended. Of course we feel strongly that GSAP belongs on that list because: It is the top performer. It has widespread industry acceptance, both in Flash and HTML5. It's recommended by Google, used by the biggest brands in the world, etc. It is framework-agnostic, super flexible and robust, able to animate anything. It is professionally supported, yet free to use in banner ads. Modernize file size specs Given the 5.6x growth factor of bandwidth and page size since 2008, it seems entirely reasonable to adjust the old 40kb limit to 200kb (5x) for the modern HTML5 era. This is entirely consistent with some in-depth testing that has been done recently aimed at identifying the file size threshold at which real-world users perceive a dip in performance. The results showed that the threshold was upwards of 250kb. Combined file size isn't the only issue that contributes to slow load times; the number of server requests can have a significant impact. A single 300kb file can often load faster than 200kb split among 20 files. HTML5 banners can't realistically mash everything into one file, though. Doing so would kill the benefits of caching and resource sharing. So a reasonable compromise seems to be a 10-file maximum. Sprite sheets can be used to combine images. Given all the factors, we'd recommend the following for standard (non-rich media) ads: 200kb combined total (gzipped) Maximum of 10 files. Any additional must be loaded "politely" (after the parent page finishes loading) Shared CDN resources like GSAP don't count toward these totals. Some have suggested slicing the 200kb standard limit into two parts - a 50kb initial load, and then the rest "politely" loads. However, we advise against this for standard (non-rich media) ads because it unnecessarily complicates the design and production process as well as QA and enforcement. Rich media ads will likely require more files and kb than the limits mentioned above, and those should be polite-loaded. By "rich media", we mean ads that contain video or expand or perform API calls (like feeding the viewer's zip code to a backend script), etc. Update documentation and guidelines It is surprisingly difficult to get answers to some of the most basic questions when preparing a banner ad campaign for even the biggest networks and publishers. What are the file size limits? Which libraries can be used? Do CDN resources count against the total file size? Is there a network-specific CDN link for common libraries? Online docs either have outdated information or none at all related to HTML5. Drop support for IE8 Legacy IE support is not just painful for developers, it's exceedingly expensive for advertisers. Certain effects are outright impossible, so creatives must learn about the IE8 pitfalls and adjust their designs. Developers are forced to rebuild entire portions, implement workarounds and perform extra testing, all to accommodate a tiny fraction of the web audience who probably don't represent the demographic that advertisers are targeting anyway. This was never an issue for Flash, but it's a HUGE issue for HTML5 because it relies on native browser technologies that are absent from older browsers like IE8. Our recommendation is to draw a line in the sand and drop support for IE8 for sure, and potentially even IE9. Consider SVG instead of iframes Displaying ads inside an iframe is nice for security, but it forces ads into a strict rectangular space (ruling out fancy overlays with transparency/mask effects that show the main web page behind) and there's a performance price too. SVG is widely supported and it has some excellent transparency/masking capabilities, plus it can serve as a single container for an entire ad (see Chris Gannon's blog post and video)! Further testing needs to be done to better understand the performance and security implications, but it certainly seems like a worthwhile contender. Create a gallery of sample banners and templates Rather than pouring over specs and instructions and then building something from scratch, most developers prefer to analyze banners that already conform to the standards and use one as a template for their own project. Each network has different API's and ways you must track clicks, etc., so it would be lovely if each one provided a gallery of demos at each standard size. Codepen.io is a great place to host a collection because it's so easy to see (and edit) the HTML, CSS, and JS as well as the result all in one place. Developers can simply click the "fork" button and start producing their own version of that banner immediately in the browser. Codepen even integrates nicely with crossbrowsertesting.com for easy QA. Adjust client expectations As the industry transitions from Flash to HTML5, clients must be made aware of the design, budget, and schedule implications. HTML5 banners take more time to produce and test, therefore they will be more expensive. Plus there are certain effects that were easy in Flash but are virtually impossible in HTML5, so creative expectations need to be adjusted as well. Common GreenSock Questions With the broader discussion out of the way, let's narrow our focus to GreenSock for a moment and address some of the most frequently asked questions: Which networks support GSAP? All networks that we're aware of allow GSAP, and most even exempt its file size from the ads and host it on their CDNs. Google DoubleClick recommends GSAP for complex animations. Here's a breakdown of how some of the major players stack up: Allows GSAP Excludes GSAP from file size calculation* Hosts GSAP on CDN Advertising.com/AOL YES YES YES Google DoubleClick YES YES YES Flashtalking YES YES YES Sizmek YES YES YES Flite YES YES YES Cofactor YES YES YES AdWords YES YES YES *Unless publisher objects which is uncommon TweenMax is too big! Where's TweenNano? Let's face it: TweenMax (the most robust tool in the GSAP suite) is overkill for many banners that are only doing simple fades and movement. Wouldn't it be smart for GreenSock to create a super-small animation engine that's targeted at banners and only has the basic features? In the Flash days, we did exactly that and called it "TweenNano". It weighed about 2kb. On the surface, it sounds like a great idea but there are several reasons we avoided TweenNano in the HTML5 toolset: Caching - this is the biggest factor; loading the JavaScript file is a one-time hit and then the browser caches it, mitigating the entire loading issue on every page thereafter. Realistically, TweenNano must include a subset of TweenLite and CSSPlugin features and weigh at least 8kb; how much longer would it take for the average user to load an extra 25kb for TweenMax? It's not even noticeable (less than one second). So it doesn't seem like a worthwhile tradeoff to rip out all those features just to gain a fraction of a second only the first time it loads, especially for banners where caching and resource sharing could be used so effectively. If networks toss TweenMax.min.js on their CDNs, it effectively becomes "free" (zero load time) very quickly, giving them instant access to all the timeline tools plus a bunch of advanced plugins. Thus it seems smarter to press the full-featured, super-fast TweenMax engine into service rather than a sliced-down TweenNano with limited effects. Performance - GSAP has been engineered with a huge priority on performance which sometimes comes with a file size tradeoff. We could accomplish the same tasks with less code in places, but runtime performance would suffer. We feel strongly that when it comes to animation, it's wiser to pay a small up-front kb tax (only a fraction of a second in most cases) in order to get maximum runtime performance. Animations must look smooth and conserve battery power. Think of it this way: would you rather buy a computer that boots up 2 seconds faster or one that's 30% faster all the time (after it boots)? Flexibility/Creativity - what if you want to animate a non-essential CSS property like boxShadow or slide along a curve or scrub through a timeline? Even if there's just one part of your banner that needs a more advanced feature, it presents a dilemma. Creativity is hampered. Again, the fraction of a second one-time cost difference for TweenMax seems well worth it for the added flexibility and peace of mind. API confusion - years ago, Adobe created a lightweight version of the Flash Player dubbed "Flash Lite" with similar aspirations (bake only the essentials into a lighter weight flavor), but it was a complete failure. One of the problems was that developers couldn't remember which features were available in the regular Flash Player versus Flash Lite. Likewise, TweenNano's feature disparity would create some confusion/frustration. What about creating a tool that lets users select only the features they need, and then it spits out a customized stripped-down version of TweenMax? Again, this sounds appealing, but it would likely lead to worse load times because instead of having one common TweenMax that gets shared and cached, every banner would have its own different (and partially redundant) flavor to load. Ultimately, we're committed to delivering the tools that are needed most, so if the broader industry decides not to leverage shared resources and publishers insist on sticking to all-inclusive aggregate file size totals, we're open to creating TweenNano. Luckily, it looks like there's excellent momentum behind TweenMax getting CDN-ified and exempted from file size limits. In our opinion, that's definitely the smartest approach. What's so special about GSAP? It's beyond the scope of this article to explain all the benefits of using GSAP; see http://greensock.com/why-gsap/ for a summary. If you're still wondering what the big deal is, we'd encourage you to find someone who is proficient with it and ask about their experience. Usually people who take the time to learn it have a "light bulb" moment pretty quickly and never want to go back to using other libraries or CSS. It's difficult to explain to the uninitiated - lists of features don't really do it justice. It's not merely about performance (although that's a biggie) - it's about feeling empowered to animate almost anything you can imagine with minimal code. Do I need a commercial license to use GSAP in banner ads? GreenSock's standard "no charge" license covers usage in banner ads even if you get paid a one-time fee to produce the banners. We fully encourage the use of GSAP in banner ads and beyond. You may want to check out Club GreenSock for some bonus plugins that allow you to easily achieve advanced effects. Is anyone building a GUI for GSAP? A visual tool for building GSAP-based animations is a popular request, and we have been approached by several large and small companies about the possibilities, but there's nothing rock solid to report yet. We hope that companies like Adobe and Google will offer export options from their tools that leverage GSAP as the runtime engine and produce well-formatted, concise code. There's a pretty neat tool called Animachine that's in alpha and can be installed as a Chrome extension. It shows promise, but isn’t entirely stable at this point. There are also several online GSAP-based banner builders: http://html5maker.com/, https://tweenui.com/, and http://www.loxiastudio.com. Where can I get GSAP training? You can have GreenSock come directly to your organization and sit with your team to get them up to speed quickly. We can even convert one of your Flash banners and then teach you how we did it which is an excellent way to learn banner-specific tricks. The Q&A sessions are invaluable. We have limited slots available, though, so contact us as soon as possible to get your event scheduled. There are plenty of other learning resources available: GreenSock's getting started video/article GreenSock's learning resources New GreenSock eBook (published by Noble Desktop) Lynda.com course ihatetomatoes.net course (intermediate/advanced) Noble Desktop class in NYC 02Geek course Egghead.io The GreenSock forums are a fantastic place to not only ask your question(s), but also poke around and see what others are saying. It's one of the best places to learn even if you never ask a question. There are plenty of demos on codepen.io as well. For inspiration, we'd suggest following these people: Chris Gannon Sarah Drasner Petr Tichy Sara Soueidan Diaco.ml Blake Bowen Ico Dimchev UPDATE: The IAB released a draft of its new HTML5 specs and is soliciting public feedback before finalizing the document. The outstanding news is that they agreed with our assessment regarding a 200kb limit for standard ads. The IAB is expected to release an update to its HTML5 Best Practices guide soon which will likely contain a short list of JavaScript libraries that are recommended for exemption from file size calculations. We're confident GSAP will be on that list. #network-support { border-spacing: 1px; border-collapse: separate; background-color: #ccc; width: 830px; line-height: 1.1em; } #network-support thead td { background-color: #333; color: white; } #network-support td { text-align: center; vertical-align: bottom; font-family: Asap, Arial, sans-serif; padding: 10px 14px; background-color: white; } #network-support .network { text-align: left; font-weight: bold; } #network-support .yes { background-image: url(/wp-content/themes/greensock/images/licencing-check.png); } #network-support .yes, #network-support .no { background-color: white; background-repeat: no-repeat; vertical-align: middle; background-position: center center; background-size: 35px 35px; color: transparent; } .disclaimer { font-size: 11px; color: #777; padding: 2px; }
  23. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. The latest version of GSAP delivers some fun new features that open up entirely new animation possibilities. Check out the videos and demos below that show what's so exciting about 1.18.0. Here's a quick summary: New "cycle" property allows you to add rich variations to staggered animations Relative HSL color tweens (affect just the hue, saturation or lightness) Complex string tweening like "1px 5px rgb(255,0,0)" Numerous improvements and bug fixes (see github) New "cycle" property for staggered animations Have you ever wanted to animate a bunch of elements/targets and alternate between certain values (or even randomize them) in a staggered fashion? The new super-flexible "cycle" property does exactly that. Instead of defining a single value (like x:100, rotation:90), you can define an Array of values to cycle through (like cycle:{x:[100,-100], rotation:[30,60,90]}) or even use function-based values (like cycle:{x:function() { return Math.random() * 200; }}). The amount of functionality you can pack into a single line of code is staggering (pun intended). Demo: array-based and function-based "cycle" values See the Pen Basic staggerTo() using cycle by GreenSock (@GreenSock) on CodePen. Advanced "cycle" effects with SplitText See the Pen SplitText with stagger and cycle by GreenSock (@GreenSock) on CodePen. Caveats The cycle property is available only in the staggerTo(), staggerFrom(), and staggerFromTo() methods in TweenMax, TimelineLite and TimelineMax. When using function-based values the function will be passed an argument which represents the index of the current tween. Inside the function body, the scope (this) refers to the target of the current tween (see source of first demo above). Relative HSL color animation Have you ever wanted to tween a color to something a little darker or lighter without having to guess at cryptic hex values? How about tween a hue to 180 degrees around the color wheel? With relative HSL tweening, it's easy. You can now use familiar relative prefixes ("+=" and "-=") directly inside hsl() strings! //30% darker backgroundColor:"hsl(+=0, +=0%, -=30%)" //to grayscale (0% saturation) backgroundColor:"hsl(+=0, 0%, +=0%)" //opposite color (180 degrees around the other side of the color wheel) backgroundColor:"hsl(+=180, +=0%, +=0%)" Relative HSL demo See the Pen Relative HSL color tweening in GSAP 1.18.0 by GreenSock (@GreenSock) on CodePen. Caveats Be careful about doing relative tweens when they could be interrupted. For example, if you have a mouseover that creates tween to +=30% and then a mouseout that does -=30% and then the user rolls over/out/over/out, you'll get odd results because of the nature of relativity. For bullet-proof rollover effects with relative values check out the demo we used in the video: Hover Demo with Relative HSL Values When you tween to a saturation of 0%, that basically loses any kind of hue data - the underlying color/hue of grayscale is non-existent. So then if you try tweening back to a saturation of 80% or something, it'll be red because that's the default zero position of hue. For example, tween a blue <div> to "hsl(+=0, 0%, +=0%)" and then to "hsl(+=0, 80%, +=0%)", it'll end up red instead of blue. That's not a bug - it's just the nature of colors in the browser (they end up in the rgb color space). Tween complex string-based values Complex string-based values containing multiple numbers can be animated without any extra plugins. For example, a value like "10px 20px 50px" can be animated to "4px 13px 200px". GSAP will find each number in the strings (in order), compare them and animate the ones that changed. CSSPlugin already does this for CSS values and it even converts units, but the base engine (TweenLite) can now do basic string tweening. It will even find rgba(...) values and make sure to round them appropriately during animation. This new feature extends to AttrPlugin too which means it can animate the complex strings inside SVG element attributes like the points in a <polygon> or <polyline> or even <path> data (please carefully read the caveats below). See the Pen Complex string-based tweening: simple shape morph by GreenSock (@GreenSock) on CodePen. Caveats This feature is NOT intended to perform complex shape morphing in SVG. It simply animates the numbers inside the strings (in order). Robust shape morphing requires dynamically parsing path data and injecting extra points in certain cases. This new complex string-based tweening lays the groundwork in the core to do a lot of advanced effects in the future, especially via plugins. If you're animating the "d" attribute of a <path> element or the "points" attribute of a <polygon> or <polyline> element, keep in mind that you MUST make sure the number (and type) of points match between the starting and ending values. And since those are attributes, use the AttrPlugin (which is already inside TweenMax). Community Demos City Construction by Sarah Drasner See the Pen City Construction Site by Sarah Drasner (@sdras) on CodePen. GreenSock Cycle by Petr Tichy See the Pen GreenSock - staggerTo with cycle by GreenSock (@GreenSock) on CodePen. Special Thanks This major update is extra special as it contains features that were largely shaped by feature requests and feedback from our community. We really appreciate the strong community that we have in our forums that not only helps each other, but also helps shape the tools themselves. Extra special thanks to Elliot Geno for suggesting cycle and relative HSL tweening, Diaco for being a testing powerhouse, and everyone who voted on the API changes. Now go download GSAP 1.18.0 and make something beautiful.
  24. Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. In recent months, the whirlwind shift to HTML5 in the banner ad industry has prompted a slew of policy changes. Publishers and networks are scrambling to answer questions from designers who want to build things "properly" (a term whose meaning can vary wildly these days). Growing pains abound. Shortly after we published an article describing the state of affairs and offering recommendations for a path forward, the IAB released a draft of their new HTML5 ad specs which echoed many of those recommendations. For example, the file size limit for standard ads was raised to 200kb. This was cause for much celebration across the industry. But we're not out of the woods yet. There is still a persistent mindset about how we look at kilobytes that's crippling the web. This article aims to challenge the old paradigm and explain why it's so important to re-assess kilobyte costs. Why limit kilobytes? Conventional wisdom says that kilobytes have a direct impact on load times and consequently user experience. File size limits exist to promote better performance. Period. Does conventional wisdom apply the same way in the HTML5 era? As we modernize our kilobyte-count policies, let's remember what the goal is: performance...or more accurately, better user experience. Not all kilobytes are created equal HTML5 has unique strengths that challenge us to move beyond the simplistic "aggregate total file size" mentality of yesteryear. We need to look at kilobyte cost in a new, more nuanced way. There are four primary factors: Cache status When is 35kb not really 35kb? When it's cached. A cached file has absolutely zero bandwidth cost regardless of its size. It loads immediately. This is particularly relevant in banner ads because there are certain chores common to almost every ad (like animation management tasks) that can be encapsulated and shared among many, many banners. The end user only loads that shared resource once and then it's cached and completely "free" thereafter...for all ads pointing at that file...on all sites. Does it really make sense to penalize ads for using those ubiquitous shared resources even though they're so pervasively cached that they don't typically affect load performance? In the modern world, file size limits should apply to the banner-specific assets that have a direct impact on loading times, not standardized shared resources. Location Kilobytes loaded from a CDN (Content Delivery Network) are typically "faster" because they're geographically dispersed and automatically loaded from the closest server. Plus CDNs have inherent redundancies leading to better reliability. Spread 200kb spread across 24 files will take longer to download than 200kb spread across only 4 files. This isn't particularly relevant in the discussion about shared resources (which should be cached very quickly), but is an argument in favor of loading TweenMax rather than the combination of TweenLite, CSSPlugin, EasePack, and TimelineLite even though they collectively use fewer kilobytes. If the industry remains focused solely on aggregate total file size, it pushes designers/developers toward less capable solutions that use fewer kilobytes even though they don't necessarily affect load times and could be replaced by more robust options that allow more creative expression. Performance yield Some kilobytes are cheap in terms of the initial load but expensive for runtime execution. If our goal is better user experience, this factor should weigh heavily into the overall kilobyte cost equation. Would you rather have a banner that loads 200ms faster with janky animation or one that's super-smooth at runtime but takes a fraction of a second longer to load? Are publishers primarily concerned with displaying ads faster initially or ensuring that their site runs smoothly once loaded? Of course there are reasonable limits either way (waiting an extra 30 seconds for a huge file to load would be intolerable even if it made things run buttery smooth), but in most cases we're only talking about fractions of a second difference. For example, GSAP contains "extra" code that automatically GPU-accelerates transforms, applies lag smoothing, leverages 3D transform matrices, avoids layout thrashing, organizes things internally to make auto overwriting super fast, etc. - would removing those features for the sake of milliseconds on initial load (and zero savings once it's cached) be a step forward or backward? Incentivizing the wrong things If the IAB and publishers don't embrace a common set of shared resources that get excluded from file size calculations... It creates inefficiencies and redundancies - thousands of ads may each contain their own [duplicate] copy of a library like TweenMax, squandering valuable bandwidth. It penalizes the use of robust, industry-standard libraries in favor of custom JS and micro-libraries that probably aren't nearly as capable, well-tested, cached, compatible, or performant. When something breaks, it will be more difficult for the various ad networks and publishers to troubleshoot and support custom JS and diverse micro-libraries. Lots of APIs to learn (or in the case of custom JS, more advanced expertise would be required). GreenSock would likely need to create a minimalistic version of TweenMax that has a tiny subset of the features. We feel strongly that this is a step backward and explain why here. So ultimately, an "all-inclusive" file size policy could actually hurt load times as well as runtime performance. Yet the primary goal of file size limits is to protect performance. Hm. If the industry rallies behind a few popular, well-maintained and performant libraries, exempting them from file size calculations because of their ubiquity, it would not only deliver a better overall user experience, but also make it easier to create high quality banners. There would be fewer headaches for networks and publishers too. TweenMax (GSAP's largest file) technically weighs around 34kb but those kilobytes are the remarkably inexpensive kind. TweenMax is widely cached, it's on multiple CDNs, it packs various tools into a single file (zero "spread"), and it has an extremely high performance yield because of its many runtime performance optimizations. There are so many ads using it already that it has little or no effect on load times. Should it really cost banner ad designers/developers 34kb against their file size budgets? Is it wise to incentivize cooking up their own custom code for handling animation tasks instead? The good news Every major ad network we’ve contacted understands the value of shared resources and is very GSAP-friendly. In fact, virtually all of them have GSAP on their own CDNs and don't count its file size against ads unless the publisher insists otherwise (which is rare). One notable exception is Adwords, but we have been told they're working on a solution. Allows GSAP Excludes GSAP from file size calculation* Hosts GSAP on CDN Advertising.com/AOL YES YES YES Google DoubleClick YES YES YES Flashtalking YES YES YES Sizmek YES YES YES Flite YES YES YES Cofactor YES YES YES Adwords YES YES YES *Unless publisher objects which is uncommon Google DoubleClick is even pioneering a process that will automatically detect when GSAP is used in an ad and swap in its own CDN link to maximize caching benefits. Pretty cool stuff. Conclusion Let's embrace the unique strengths of HTML5 and modernize the way we count kilobyte costs. Let's support policies that incentivize better performance and user experience rather than a race to the smallest total file size for each individual ad. Caching, CDNs, kilobyte spread, and performance yield should all factor into the way we view kilobytes the HTML5 era. FAQ Isn't it unfair if the IAB only recommends a few popular libraries? What about newer or lesser-known libraries? This is an entirely valid concern. The list should be reviewed regularly and the IAB can assess each library's industry support, performance profile, compatibility, and track record for ongoing updates and bug fixes. New contenders could be submitted for consideration anytime. But remember that the key to realizing the performance benefits is keeping the list short so that caching is focused and pervasive. If there are too many "standardized" libraries, it dilutes caching and defeats the purpose. There's no way that everyone will agree on which libraries should be on the list but if we get hung up on not offending anyone or being afraid to appear biased, we'll miss the opportunity to move the industry forward. The list won't be perfect, but not having a list at all is much worse. What happens when a library gets updated? Wouldn't it need to be re-cached? Yes. And trust me - we want libraries to be updated somewhat regularly to work around new browser inconsistencies, patch library bugs, and implement new features that drive things forward. But these updates wouldn't need to interfere with existing or legacy ads - when a library is updated, a new CDN URL would be generated and new ads could optionally point to that version. Those ads would indeed trigger browsers to cache that new version but this should happen very quickly. Most likely within a matter of days the new version would be pervasively cached across the web. Yes, each end user would pay that kilobyte tax once on the first load and then it would be "free" thereafter. Would GreenSock still recommend this policy if GSAP wasn't included in the short list of exempt libraries? Absolutely. This isn't just about getting GSAP an exemption - this is what we believe is best for the industry overall even if GSAP isn't on the list.
  25. GreenSock

    Ease Visualizer

    Note: This page was created for GSAP version 2. We have since released GSAP 3 with many improvements. While it is backward compatible with most GSAP 2 features, some parts may need to be updated to work properly. Please see the GSAP 3 release notes for details. The ease-y way to find the perfect ease A solid mastery of easing is what separates the top-notch animators from the hacks. Use this tool to play around and understand how various eases "feel". Notice that you can click the underlined words in the code sample at the bottom to make changes. Some eases have special configuration options that open up a world of possibilities. If you need more specifics, head over to the docs. Quick Video Tour of the Ease Visualizer A special thanks to Jamie Barlow who built almost the entire thing. He's one of our all-stars in the forums, lending his wisdom and animation prowess to our whole community. He's a rock star. Take your animations to the next level with CustomEase CustomEase frees you from the limitations of canned easing options; create literally any easing curve imaginable by simply drawing it in the Ease Visualizer or by copying/pasting an SVG path. Zero limitations. Use as many control points as you want. Grab CustomEase below or find out more.
×