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AP target #app > div not found.

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i'm trying to make a parallax effect on the background. 

i"m trying to access to div using the class generated by react 

when i load the page the script run but the gsap code shows an error 

but when i copy paste the same script i runs well 





See the Pen ExdvjeB by ytmicrocom (@ytmicrocom) on CodePen

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It sounds like you must be calling that code when the element doesn't actually exist.


It's pretty tough to troubleshoot without a minimal demo - the one you provided doesn't illustrate the issue properly. Well, it does but obviously it's because your element doesn't exist. 


Would you please provide a very simple CodePen, Stackblitz or CodeSandbox that demonstrates the issue? 


Here's a Stackblitz starter template that you can fork - it already imports GSAP/ScrollTrigger and shows how to use gsap.context()


Please don't include your whole project. Just some colored <div> elements and the GSAP code is best.


Once we see an isolated demo, we'll do our best to jump in and help with your GSAP-specific questions. 

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