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Tween not completing?

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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 Some information, especially the syntax, may be out of date for GSAP 3.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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I'm trying to animate elemens when they are in viewport. However, they often stop animating.


My "in-view" code:

const elems = [...document.querySelectorAll('[data-scroll]')]

this.observer = new IntersectionObserver(entries => {
  entries.forEach(entry => {
    if (entry.intersectionRatio > 0) {
      TweenMax.from(entry.target, 2, { y: 200, alpha: 0, ease: Expo.easeOut })
    } else {
      TweenMax.set(entry.target, { clearProps: 'all' })

elems.forEach(elem => {


Why is this?


EDIT: I't works if i do fromTo instead of from. But why?


Attached image of issue.



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Hi @jesper.landberg,


Could you set up a reduced case example? I am guessing you are using Vue.js but regardless it will be pretty hard to help without seeing what's going wrong.



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