Gsap Flip & Scrolltrigger scroll effect

[Daintily5853]

Hi, I would like to replicate an effect where there is an initial circle in the center of the screen and when the user scrolls down the circle should come down to the bottom right.
I am unable to properly get this effect, I would appreciate some help over this, Thanks.

 

I've linked a codepen demo for the effect that I was able to come up with. But is not even close to what I wanted to achieve. 

See the Pen poBarMG by kazuma-0-the-bashful (@kazuma-0-the-bashful) on CodePen

[Rodrigo]

Hi @Daintily5853 and welcome to the GSAP Forums!

 

Maybe the demo Jack created in this thread could help you to get started:

 

Hopefully this helps.

Happy Tweening!

[Daintily5853]

@Rodrigo Thank you so much. This does indeed work, but when I am trying to use this with nextjs, I am encountering this problem when the flip element hides behind in the initial state and shows up halfway

[GSAP Helper]

Without a minimal demo, it's very difficult to troubleshoot; the issue could be caused by CSS, markup, a third party library, a 3rd party script, etc. Would you please provide a very simple CodePen or Stackblitz that illustrates the issue? 

 

Please don't include your whole project. Just some colored <div> elements and the GSAP code is best. See if you can recreate the issue with as few dependencies as possible. Start minimal and then incrementally add code bit by bit until it breaks. Usually people solve their own issues during this process! If not, at least we have a reduced test case which greatly increases your chances of getting a relevant answer.

 

See the Pen aYYOdN by GreenSock (@GreenSock) on CodePen

that loads all the plugins. Just click "fork" at the bottom right and make your minimal demo: 

 

Using a framework/library like React, Vue, Next, etc.? 

CodePen isn't always ideal for these tools, so here are some Stackblitz starter templates that you can fork and import the gsap-trial NPM package for using any of the bonus plugins: 

• React (please read this article!)
• Next
• Svelte
• Sveltekit
• Vue
• Nuxt

 

Please share the StackBlitz link directly to the file in question (where you've put the GSAP code) so we don't need to hunt through all the files. 

 

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

[GSAP Helper]

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. 

[Daintily5853]

Here is the fork, I've used the react starter template for this

https://stackblitz.com/edit/react-8bi4qg?file=src%2FApp.js

 

In this one, I'm unsure what is happening. The animation doesn't seem to be working at all

[GreenSock]

I noticed a few problems:

• You weren't doing proper cleanup - React calls hooks TWICE in strict mode (annoying, I know). Since you didn't return the sphere to the original parent, the 2nd time the hook ran, the sphere was already reparented to the target, thus the Flip animation wasn't really doing anything (the state was identical)
• You had overflow: hidden on the second element, thus you couldn't see the sphere. 

Is this more like what you were looking for? 

https://stackblitz.com/edit/react-11fqur?file=src%2FApp.js

[Daintily5853]

6 hours ago, GreenSock said:

I noticed a few problems:

• You weren't doing proper cleanup - React calls hooks TWICE in strict mode (annoying, I know). Since you didn't return the sphere to the original parent, the 2nd time the hook ran, the sphere was already reparented to the target, thus the Flip animation wasn't really doing anything (the state was identical)
• You had overflow: hidden on the second element, thus you couldn't see the sphere. 

Is this more like what you were looking for? 

https://stackblitz.com/edit/react-11fqur?file=src%2FApp.js

Thank you so much, this is perfect.

 

I had completely forgotten about reparenting the element

 

Have a nice day!