gsap horizontal infinite scroll animation and scroll trigger sometimes the animation is interrupted and the image disappears

[Semih]

I use animation and gsap scroll trigger. Normally, it should cover the entire screen horizontally and loop infinitely. But sometimes the animation gets interrupted, can you help?

 

https://stackblitz.com/edit/stackblitz-starters-z2kwtb?description=A create-react-app project based on react and react-dom&file=src%2FServices.css,src%2FApp.js&title=React Starter

[GSAP Helper]

Hi there! I see you're using React -

Proper cleanup is very important with frameworks, but especially with React. React 18 runs in strict mode locally by default which causes your useEffect() and useLayoutEffect() to get called TWICE.

 

Since GSAP 3.12, we have the useGSAP() hook (the NPM package is here) that simplifies creating and cleaning up animations in React (including Next, Remix, etc). It's a drop-in replacement for useEffect()/useLayoutEffect(). All the GSAP-related objects (animations, ScrollTriggers, etc.) created while the function executes get collected and then reverted when the hook gets torn down.

 

Here is how it works:

const container = useRef(); // the root level element of your component (for scoping selector text which is optional)

useGSAP(() => {
  // gsap code here...
}, { dependencies: [endX], scope: container }); // config object offers maximum flexibility

Or if you prefer, you can use the same method signature as useEffect():

useGSAP(() => {
  // gsap code here...
}, [endX]); // simple dependency Array setup like useEffect()

This pattern follows React's best practices.

 

We strongly recommend reading the React guide we've put together at https://gsap.com/resources/React/

 

If you still need help, here's a React starter template that you can fork to create a minimal demo illustrating whatever issue you're running into. Post a link to your fork back here and we'd be happy to take a peek and answer any GSAP-related questions you have. Just use simple colored <div> elements in your demo; no need to recreate your whole project with client artwork, etc. The simpler the better. 

[Semih]

53 minutes ago, GSAP Helper said:

Hi there! I see you're using React -

Proper cleanup is very important with frameworks, but especially with React. React 18 runs in strict mode locally by default which causes your useEffect() and useLayoutEffect() to get called TWICE.

 

Since GSAP 3.12, we have the useGSAP() hook (the NPM package is here) that simplifies creating and cleaning up animations in React (including Next, Remix, etc). It's a drop-in replacement for useEffect()/useLayoutEffect(). All the GSAP-related objects (animations, ScrollTriggers, etc.) created while the function executes get collected and then reverted when the hook gets torn down.

 

Here is how it works:

const container = useRef(); // the root level element of your component (for scoping selector text which is optional)

useGSAP(() => {
  // gsap code here...
}, { dependencies: [endX], scope: container }); // config object offers maximum flexibility

Or if you prefer, you can use the same method signature as useEffect():

useGSAP(() => {
  // gsap code here...
}, [endX]); // simple dependency Array setup like useEffect()

This pattern follows React's best practices.

 

We strongly recommend reading the React guide we've put together at https://gsap.com/resources/React/

 

If you still need help, here's a React starter template that you can fork to create a minimal demo illustrating whatever issue you're running into. Post a link to your fork back here and we'd be happy to take a peek and answer any GSAP-related questions you have. Just use simple colored <div> elements in your demo; no need to recreate your whole project with client artwork, etc. The simpler the better. 

I applied it but the problem seems different. You can see it if you check it on stackblitz. The secondText ref disappears during part of the animation. Normally it should go in an infinite loop

https://stackblitz.com/edit/stackblitz-starters-z2kwtb?description=A create-react-app project based on react and react-dom&file=src%2FServices.css,src%2FApp.js&title=React Starter

 

[Rodrigo]

Hi,

 

You're definitely looking for the Horizontal Seamless Loop helper function:

https://gsap.com/docs/v3/HelperFunctions/helpers/seamlessLoop

 

Here is a simple demo in React:

https://stackblitz.com/edit/vitejs-vite-auctqy?file=src%2FApp.jsx

 

Hopefully this helps.

Happy Tweening!