How to listen to route changes in react router v4?

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?

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

Sam Parmenter

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.

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}`)
})

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

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.

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