在路由更改时更改状态 Next.js

Question

I'm toggling navigation in next.js, it works fine, it's just I want the navigation to close again when the route changes.

For example, if I'm on the home page and toggle the navigation, the navigation opens and shows a link to the about page. If I click that link, I get taken to the about page as expected - but the navigation is still open!

I've tried a few things - I think I want to utilize onRouteChangeComplete(url) but I'm struggling to update the navActive state.

My page.js file:

class Page extends Component {
  state = {
    navActive: false
  };

  toggle = () => {
    this.setState({
      navActive: !this.state.navActive
     });
  };

  render() {
    return (
      <ThemeProvider theme={theme}>
        <StyledPage className="full-page-wrapper">
          <Meta />
          <Header navActive={this.state.navActive} toggle={this.toggle} />
          <PrimaryContent>{this.props.children}</PrimaryContent>
          <GlobalStyle />
        </StyledPage>
      </ThemeProvider>
    );
  }
}

Then my header file:

class Header extends React.Component {
  render() {
    return (
      <HeaderSide

        <HeaderToggleBar onClick={() => this.props.toggle()} />

      </HeaderSide>
    );
  }
}

So the app starts off with navActive state of false, clicking the HeaderToggleBar element opens and closes the nav. But I need to close the nav when the route changes. I guess I could put the click event on the navigation items within the header (so clicking to a new page toggles) but that seems a bit over the top.

Thank you.

Answer 1

Have a look at https://github.com/zeit/next.js/#router-events . You should be fine with sth like this in the ctor of your Header component:

constructor(props){
  super(props);

  Router.events.on('routeChangeComplete', (url) => {
    props.toggle();
  });
}

Answer 2

if you're using a functional React component, you can do this:

   const router = useRouter();

   useEffect(() => {
    if (isMenuOpen) {
      setMenuOpen(!isMenuOpen);
    }
  }, [router.asPath]);

Answer 3

when route changing is happening, next.js is trying to load the other page. A better way to handle the route change, if you are tracking the loading state, keep that loading state true, until the route change is complete.

 const router = useRouter();

 useEffect(() => {
    const handleComplete = () => {
      setIsLoading(false);
    };
    router.events.on("routeChangeComplete", handleComplete);
    router.events.on("routeChangeError", handleComplete);

    return () => {
      router.events.off("routeChangeComplete", handleComplete);
      router.events.off("routeChangeError", handleComplete);
    };
  }, [router]);

Answer 4

We can use router events to handle this. Refer: https://nextjs.org/docs/api-reference/next/router#usage-6

const router = useRouter();
useEffect(() => {
  router.events.on('routeChangeComplete', handleRouteChange)
  return () => {
    router.events.off('routeChangeComplete', handleRouteChange)
  };
}, [router.events]);

Answer 5

Reference: https://nextjs.org/docs/api-reference/next/router

There you can see class component base code. But here I use the functional components to solve this issue.

useEffect(() => {
    const handleRouteChange = () => {
        setOpenDropdown(false)
    }
    router.events.on('routeChangeStart', handleRouteChange)
}, [])

Answer 6

I believe you need to bind your callback. You might also need to add a constructor. Here's an snippet from a project that accepts file uploads.

    class Files extends React.Component {
        // define your constructor and call super before setting state vars
        constructor(props){
            super(props);
            this.state = {
                uploadStatus: false
            }
            // Bind your callback
            this.handleUploadImage = this.handleUploadImage.bind(this);
            // set other initial vars if needed
        }

        handleUploadImage(files){
            // do stuff with the files
        }

        render () {
            return (
                <div id="fileContainer">
                    <MyDropzone id={this.props.project._id} onDrop={this.handleUploadImage}>
                        {({getRootProps}) => <div {...getRootProps()} />}
                    </MyDropzone>
                </div>
            )
        }
    }

Answer 7

Use this awesome library which handles routing with redux in nextjs:

https://github.com/danielr18/connected-next-router

Answer 8

Complete example<\/strong>

import { useRouter } from 'next/router';

const Menu = () => {
  const router = useRouter();
  const [show, setShow] = useState(false);

  const hide = useCallback(() => {
    setShow(false);
  }, [setShow]);

  useEffect(() => {
    // subscribe
    router.events.on('routeChangeStart', hide);
    
    // unsubscribe
    return () => router.events.off('routeChangeStart', hide);
  }, [hide, router.events]);

  return show ? <div>menu</div> : null
}