How to debug React Router?

You can wrap your Router with a DebugRouter which will print the navigation actions made:

import React, { Component } from 'react';
import { BrowserRouter, Route, Switch } from 'react-router-dom';
import Login from 'components/Login'
import DefaultComponent from 'components/DefaultComponent'

class DebugRouter extends BrowserRouter {
  constructor(props){
    super(props);
    console.log('initial history is: ', JSON.stringify(this.history, null,2))
    this.history.listen((location, action)=>{
      console.log(
        `The current URL is ${location.pathname}${location.search}${location.hash}`
      )
      console.log(`The last navigation action was ${action}`, JSON.stringify(this.history, null,2));
    });
  }
}

class App extends Component {
  render() {
    return (
      <DebugRouter>
        <Switch>
          <Route exact path="/login" name="Login Page" component={Login} />
          <Route path="/" name="Home" component={DefaultComponent} />
        </Switch>
      </DebugRouter>
    );
  }
}

link to the gist

You can try something like this

import React, {Component} from 'react';
import PropTypes from 'prop-types'
import {withRouter} from "react-router-dom";

class RouterDebugger extends Component {
    componentWillUpdate(nextProps, nextState){
        console.log('componentWillUpdate',nextProps, nextState)
    }
    componentDidUpdate(prevProps) {
        console.log('componentDidUpdate',prevProps)

    }

    render() {
        return null
    }
}

export default withRouter(RouterDebugger)

And insert this component in any place you want to debug. You can pass a prop with some identifier i hope this help you

I made my DebugRouter for functional components

const DebugRouter = ({ children }: { children: any }) => {
  const { location } = useHistory()
  if (process.env.NODE_ENV === 'development') {
    console.log(
      `Route: ${location.pathname}${location.search}, State: ${JSON.stringify(location.state)}`,
    )
  }

  return children
}

const Router = () => {
  return (
    <BrowserRouter>
      <Layout>
        <Route
          render={() => {
            return (
              <DebugRouter>
                <Switch>
                  <Redirect exact from="/" to={...} />
                  // <Route/> should be here

                  <Redirect from="*" to={...} />
                </Switch>
              </DebugRouter>
            )
          }}
        />
      </Layout>
    </BrowserRouter>
  )
}