How to listen to route changes in react router v4?

问题

I have a couple of buttons that acts as routes. Everytime the route is changed, I want to make sure the button that is active changes.

Is there a way to listen to route changes in react router v4?

回答1:

I use withRouter to get the location prop. When the component is updated because of a new route, I check if the value changed:

@withRouter
class App extends React.Component {

  static propTypes = {
    location: React.PropTypes.object.isRequired
  }

  // ...

  componentDidUpdate(prevProps) {
    if (this.props.location !== prevProps.location) {
      this.onRouteChanged();
    }
  }

  onRouteChanged() {
    console.log("ROUTE CHANGED");
  }

  // ...
  render(){
    return <Switch>
        <Route path="/" exact component={HomePage} />
        <Route path="/checkout" component={CheckoutPage} />
        <Route path="/success" component={SuccessPage} />
        // ...
        <Route component={NotFound} />
      </Switch>
  }
}

Hope it helps

回答2:

To expand on the above, you will need to get at the history object. If you are using BrowserRouter, you can import withRouter and wrap your component with a higher-order component (HoC) in order to have access via props to the history object's properties and functions.

import { withRouter } from 'react-router-dom';

const myComponent = ({ history }) => {

    history.listen((location, action) => {
        // location is an object like window.location
        console.log(action, location.pathname, location.state)
    });

    return <div>...</div>;
};

export default withRouter(myComponent);

The only thing to be aware of is that withRouter and most other ways to access the history seem to pollute the props as they de-structure the object into it.

回答3:

You should to use history v4 lib.

Example from there

history.listen((location, action) => {
  console.log(`The current URL is ${location.pathname}${location.search}${location.hash}`)
  console.log(`The last navigation action was ${action}`)
})

回答4:

withRouter, history.listen, and useEffect (React Hooks) works quite nicely together:

const Component = ({ history }) => {
    useEffect(() => history.listen(() => {
        // do something on route change
        // for my example, close a drawer
    }), [])

    //...
}

export default withRouter(Component)

The listener callback will fire any time a route is changed, and the return for history.listen is a shutdown handler that plays nicely with useEffect.

回答5:

With hooks:

import { useEffect } from 'react'
import { withRouter } from 'react-router-dom'
import { history as historyShape } from 'react-router-prop-types'

const DebugHistory = ({ history }) => {
  useEffect(() => {
    console.log('> Router', history.action, history.location])
  }, [history.location.key])

  return null
}

DebugHistory.propTypes = { history: historyShape }

export default withRouter(DebugHistory)

Import and render as <DebugHistory> component

回答6:

In some cases you might use render attribute instead of component, in this way:

class App extends React.Component {

    constructor (props) {
        super(props);
    }

    onRouteChange (pageId) {
        console.log(pageId);
    }

    render () {
        return  <Switch>
                    <Route path="/" exact render={(props) => { 
                        this.onRouteChange('home');
                        return <HomePage {...props} />;
                    }} />
                    <Route path="/checkout" exact render={(props) => { 
                        this.onRouteChange('checkout');
                        return <CheckoutPage {...props} />;
                    }} />
                </Switch>
    }
}

Notice that if you change state in onRouteChange method, this could cause 'Maximum update depth exceeded' error.

来源：https://stackoverflow.com/questions/41911309/how-to-listen-to-route-changes-in-react-router-v4

标签

react-router-v4