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Enlarge on hover, reduce on leave

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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 Some information, especially the syntax, may be out of date for GSAP 3.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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What am I doing wrong here. On mouse  hover it should enlarge the text hovered. On mouseleave it should scale back.

See the Pen ZNmJEz by anon (@anon) on CodePen

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There were several problems. First, you were using document.getElementsByClassName(".st1") which returns a NodeList (like an Array), but you were treating it like it'd return a single element (by appending .addEventListener(....)). You can't addEventListener() to a NodeList/Array. 


Also, you used the wrong selector text. It should simply be "st1", not ".st1" because you're using getElementsByClassName(). I'd recommend switching to document.querySelectorAll() which is more flexible and you can use that selector text (".st1"). 


You had logic that'd cause things to grow when the mouse LEAVES them (instead of when it rolls over them). I assume that behavior was inverted, based on what you said in your question. 


I wasn't sure if you wanted each piece to animate independently, but here's a fork:

See the Pen 07568569cbe81411ec128eb0a9f542c4?editors=0010 by GreenSock (@GreenSock) on CodePen


Does that help? 

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Love your explanation. thanks

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