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Pinned element not pinning to top of pin spacer

Lb1594 test
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Go to solution Solved by Rodrigo,

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I am new to gsap so I apologise in advance if I am missing something obvious.

I've created a sandbox of the issue im having where the element I am trying to pin is not pinning to the top of the viewport when scrolling down the page, the link is here: https://codesandbox.io/s/rough-moon-x34wgz?file=/src/App.js . 


Any help or advice would be massively appreciated!

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Hi @Lb1594 and welcome to the GreenSock forums!


You are officially another victim of the double call in React's effect hooks (useEffect and useLayoutEffect) as explained here:


When using React GSAP Context is your best friend:



Basically you have to create your ScrollTrigger inside a Context instance:

useEffect(() => {
  const ctx = gsap.context(() => {
    gsap.to(elementRef.current, {
      scrollTrigger: {
        trigger: elementRef.current,
        start: "top top",
        end: "+=200vh",
        pin: true,
        pinSpacing: false,
        markers: true,
  return () => ctx.revert();
}, []);

Finally I'd recommend you to check the resources in this page:


Hopefully this helps.

Happy Tweening!

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