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eguneys

Tweening to position causes problem on page scroll

Go to solution Solved by OSUblake,

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 Some information, especially the syntax, may be out of date for GSAP 3.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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I am tweening the red box on top of blue box. It works fine unless I scroll the page a little bit, in that case it breaks.

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

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  • Solution

You need to find the scroll offset.

 

See the Pen oXYLor by osublake (@osublake) on CodePen

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Blake is right (as usual) - this isn't related to GSAP, it's just that you were using the browser's getBoundingClientRect() method which DOES NOT factor in the scroll position (it's just the viewport). 

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