backgroundPosition Problem

[nomn 0 Likes (Newbie)]

Greeting to GSAP Team!

Great thanks for making this amazing tool!

 

Now about my problem, please, if you can, help me with it.

I'm trying to tween backgroundPosition, but it's isn't work with some properties.

 

For example:

// This is NOT work
TweenMax.fromTo($(this).children('a'), 0.8,
            {backgroundPosition: 'center left'},
            {backgroundPosition: 'center right'}
);

And this:

// Now it Work
TweenMax.fromTo($(this).children('a'), 0.8,
            {backgroundPosition: 'center left'},
            {backgroundPosition: 'top center'}
);

The starting background position of element (css style) is "center left".

 

[Diaco 1,948 Likes (Superhero)]

Hi nomn 

 

You set wrong values for X / Y ,  pls check values Order : 

 

backgroundPosition : '  Xpos   Ypos  '

 

http://www.w3schools.com/cssref/playit.asp?filename=playcss_background-position

 

http://www.w3schools.com/cssref/pr_background-position.asp

[Jonathan 5,176 Likes (Superhero)]

Hello nomn, and Welcome to the GreenSock Forum!

 

Have you tried using the equivalent of the position keywords.. which is using percentages:

• top
  Equivalent to 0% for the vertical position.
   
• right
  Equivalent to 100% for the horizontal position.
   
• bottom
  Equivalent to 100% for the vertical position.
   
• left
  Equivalent to 0% for the horizontal position.
   
• center
  Equivalent to 50% for the horizontal position if it is not otherwise given, or 50% for the vertical position if it is.

So your example that didn't work try this using percentages:

// so instead of this:
// This is NOT work
TweenMax.fromTo($(this).children('a'), 0.8,
            {backgroundPosition: 'center left'},
            {backgroundPosition: 'center right'}
);

// try this
// See if this works
TweenMax.fromTo($(this).children('a'), 0.8,
            {backgroundPosition: '50% 0%'},
            {backgroundPosition: '50% 100%'}
);

:

See if that helps? If not please create a codepen demo so we can better help test your code in a live environment.

 

Here is a cool video tut by GreenSock on how to create a codepen demo example.

 

Thanks!

[nomn 0 Likes (Newbie)]

I'm so ashamed. Sorry for such a question. Thank you very much

[Jonathan 5,176 Likes (Superhero)]

No worries nomn.. we are here to help! Happy Tweening