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George Carlin

transition in old IEs

Go to solution Solved by Jonathan,

Warning: Please note

This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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If you talking about animating x and y ... just use top and left. Some more specifics will help to get more specific answers.

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Hello George Carlin


You can do a conditional if check if the browser is IE9 and below.. if so then animate top and left, otherwise use x and y.


You could use this to check via javascript using feature detection:



var docMode = document.documentMode,
    hasDocumentMode = (docMode !== undefined), 
    isIE8 = (docMode === 8),
    isIE9 = (docMode === 9),
    isIE10 = (docMode === 10),
    isIE11 = (docMode === 11);

// browser is IE
if(hasDocumentMode) {
         // browser is IE11
     } else if(isIE10){
         // browser is IE10
     } else if(isIE9){
         // browser is IE9
     } else if(isIE8){
         // browser is IE8


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actually I was more concern about the easing matters, but then I did a test with greensock on IE 8 and it worked good.

I'm just a bit curious to know how easings work on IE 8 when it does not support CSS transitions!

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  • Solution

GSAP uses and creates its own easing functions.




The CSS transition easing functions are unrelated, since that easing is only used for CSS animations and CSS transitions that are based on the CSS easing spec.




Usually with easing the various functions used are equivelent to those in the CSS transition-timing functions. But GSAP also has other custom easing functions not found in the CSS spec. Like SlowMo, Bounce, Rough, Elastic .. etc..


You can see all of GSAP Easing Docs here:





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Also, GSAP never uses CSS transitions or CSS animations. Properties are applied to inline styles via JavaScript which allows for superior control, flexibility and browser support.

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