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Tween -webkit-mask-size?

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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 Some information, especially the syntax, may be out of date for GSAP 3.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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Good afternoon!


Trying to figure out how I can tween my "-webkit-mask-size" CSS Prop?


it seems to invalidate my javascript when there are "-"s in the code..




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webkitMaskSize isn't currently supported as a tweenable property, but you can manually adjust it via an onUpdate callback like so:

See the Pen iDIEF by GreenSock (@GreenSock) on CodePen

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One reason it wasn't working by default is that you didn't provide a suffix (like "px" or "%") and CSSPlugin didn't know what to use as a default. You could fix it by either defining a default like:


CSSPlugin.suffixMap.WebkitMaskSize = "px";

or define it in your tween:


TweenMax.to("h1", 4, {WebkitMaskSize:"300px"});
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