Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node

[Romanus]

Hello! I have a problem in using pin in React. I don't know how the pin works internally, so it's hard for me to understand why the error occurs.

I have reduced the example as much as possible, and will try to explain what I want to do. Feel free to ask questions if I explain something poorly. I write through translator

 

The elements are wrapped in a Cantainer component.

const App = () => {
  return(
  <Container>
      <div className='el'>1</div>
      <div className='el'>2</div>
      <div className='el'>3</div>
  </Container>

  );
}

I want to remove container based on screen size. At the same time, elements inside the container should not be deleted.

function Container(props){
  const [state,setState]=useState(true)

  if(!state) return props.children
  
  if(state)
  return(
    <section ref={ref}>
      {props.children}
    </section>
  )
}

if state is true - render with container
if state is false - render without container

 

In useEffect I listen to the screen size and call setState when needed

 

This works great. But if I try to remove the Container component in which the Pin is set, I get an error:

Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node

 

Can I fix this? you can activate the pin in my example to see the error

See the Pen oNPdNKp?editors=1011 by romanusname (@romanusname) on CodePen

[Rodrigo]

Hi,

 

The issue is that you're not reverting your ScrollTrigger instance when the element is removed, so ScrollTrigger has an instance and when you resize the screen, ScrollTrigger refreshes but the container is not there anymore. Just use GSAP MatchMedia and forget about the window matchmedia stuff:

useEffect(() => {
  const mm = gsap.matchMedia();
  mm.add("(max-width: 399px)", () => {
    setState(false);
  });
  mm.add("(min-width: 400px)", () => {
    setState(true);
    gsap.to(ref.current, {
      scrollTrigger: {
        trigger: ref.current,
        pin: true
      }
    });
  });
  return () => mm.revert();
}, []);

GSAP MatchMedia will take care of reverting and removing everything for you when the breakpoints are passed, super simple! 🚀 🥳

 

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

 

You can read more about it here:

https://greensock.com/docs/v3/GSAP/gsap.matchMedia()

 

Hopefully this helps.

Happy Tweening!

[Romanus]

This works very well in React! But I got a problem in Next js.

During the MatchMedia process, "ref" becomes "null". This is weird.

For clarity, I replaced the pin with background: blue. there are 2 examples. Next js and React.

stackblitz doesn't show an error for some reason. There is an error in my project. I print ref to console and get null

 

An error occurs in next js if the window is reduced and then enlarged

https://stackblitz.com/edit/nextjs-hauxvq?file=components%2FContainer.js,app%2Fpage.js

 

See the Pen QWVrzLX?editors=0011 by romanusname (@romanusname) on CodePen

 

[Rodrigo]

Hi,

 

This solves the issue with the ref being null:

export default function Container(props) {
  const ref = useRef();
  const [state, setState] = useState(true);
  useEffect(() => {
    console.log("let's go", Date.now());
    const mm = gsap.matchMedia();
    mm.add('(max-width: 399px)', () => {
      setState(false);
    });
    mm.add('(min-width: 400px)', () => {
      setState(true);
      if (!state) return;
      gsap.to(ref.current, {
        background: 'blue',
      });
    });
    return () => mm.revert();
  }, [state]);

  if (!state) return props.children;

  if (state) return <section ref={ref}>{props.children}</section>;
}

As for the other error, remember that NextJS uses UMD modules and not ES modules, so you have to import GSAP and it's plugins from the dist folder:

import gsap from "gsap/dist/gsap";
import { ScrollTrigger } from "gsap/dist/ScrollTrigger";

if (typeof window !== "undefined") {
  gsap.registerPlugin(ScrollTrigger);
}

Hopefully this clear things up.

Happy Tweening!