How do I get a hold of the store/dispatch in React-Router onEnter?

Question

I'm not using Redux-Router (maybe I have to?) but my router is wrapped by Provider and the store is being passed to that.

I'd like to read state and dispatch in the onEnter handler.

Answer 1

I just wrapped my routes in a function that returns them.

This allows you to pass the redux store as an argument

Any onEnter/onExit functions are also defined in there so they have access to that store argument and can dispatch() stuff.

import React from 'react'
import { IndexRoute, Route } from 'react-router'

import App from './components/app'
import FourOhFour from './components/pages/404'
import Home from './components/home'
import LogIn from './components/account/log_in'
import ResetPassword from './components/account/reset_password'
import SignUp from './components/account/sign_up'

export function getRoutes (store) {
  function doSomething (thing) {
    store.dispatch(addToDoActionCreator(thing))
  }

  function authenticate (nextState, replaceState) {
    const { currentUser } = store.getState();

    if ( !currentUser ) {
      replaceState(null, '/log-in');
    }
  }

  return (
    <Route path='/' component={App}>
      <IndexRoute component={Home} onEnter={(nextState, replaceState)=>{doSomething('get coffee')}} />

      <Route path='log-in' component={LogIn} onEnter={authenticate} />
      <Route path='sign-up' component={SignUp} />
      <Route path='reset-password' component={ResetPassword} />

      <Route path="*" component={FourOhFour}/>
    </Route>
  );
}

On the server side (express.js for me) I establish a redux store fairly early with middleware. Something like this.

server.use((req, res, next) => {
  const createStoreWithMiddleware = applyMiddleware(
    thunkMiddleware
  )(createStore);
  res.store = createStoreWithMiddleware(rootReducer);

  next();
}

So now the store is attached to the response object and can be used by other middleware/routes. They can get state (res.store.getState()) and dispatch to update state.

Answer 2

Just create your redux store in an seperate file and require it when it's needed.

// store.js

import { createStore } from 'redux'
import todoApp from './reducers'
  
export default createStore(todoApp);

// the file where you define your routes and onEnter

import { render } from 'react-dom';
import { Router, Route } from 'react-router';
import store, { dispatch } from './store.js';

function enterHandler(){
  dispatch(allTheGoodStuff);
}

render(
  <Router>
    <Route onEnter={ enterHandler } ...
)