Warning: Failed propType: Invalid prop `component` supplied to `Route`

问题

I'm trying new react-router 1.0.0 and I'm getting strange warnings I can't explain:

Warning: Failed propType: Invalid prop `component` supplied to `Route`.

Warning: Invalid undefined `component` supplied to `Route`.

The app is simple:

import React from 'react';
import ReactDOM from 'react-dom';
import { Router, Route } from 'react-router';

import App from './components/app';

var Speaker = require('./components/speaker');

ReactDOM.render((
    <Router>
      <Route path="/" component={App}>
        // This is the source of the warning:
        <Route path="speaker" component={ Speaker }/>
      </Route>
    </Router>
), document.getElementById('react-container'));

speaker.jsx:

import React from 'react';

var Speaker = React.createClass({
  render() {
    return (
        <h1>Speaker</h1>
    )
  }
});

module.exoprts = Speaker;

app.jsx only has the following render() function:

render() {
    return (
        <div>
            <Header title={this.state.title} status={this.state.status} />

            {this.props.children}
        </div>);
}

When I type in the route to #/speaker or #speaker - nothing is displayed except for title. Please help.

回答1:

Standardize your module's imports and exports then you won't risk hitting problems with misspelled property names.

module.exports = Component should become export default Component.

CommonJS uses module.exports as a convention, however, this means that you are just working with a regular Javascript object and you are able to set the value of any key you want (whether that's exports, exoprts or exprots). There are no runtime or compile-time checks to tell you that you've messed up.

If you use ES6 (ES2015) syntax instead, then you are working with syntax and keywords. If you accidentally type exoprt default Component then it will give you a compile error to let you know.

In your case, you can simplify the Speaker component.

import React from 'react';

export default React.createClass({
  render() {
    return (
      <h1>Speaker</h1>
    )
  }
});

回答2:

it is solved in react-router-dom 4.4.0 see: Route's proptypes fail

now it is beta, or just wait for final release.

npm install react-router-dom@4.4.0-beta.6 --save

回答3:

In some cases, such as routing with a component that's wrapped with redux-form, replacing the Route component argument on this JSX element:

<Route path="speaker" component={Speaker}/>

With the Route render argument like the following, will fix issue:

<Route path="speaker" render={props => <Speaker {...props} />} />

回答4:

This is definitely a syntax issue, when it happened to me I discovered I typed

module.export = Component; instead of module.exports = Component;

回答5:

It's a syntax issue related to imports/exports in your files, mine resolved by removing an extra quote from my import

<Route path={`${match.path}/iso-line-number`} component={ISOLineNumber} />

回答6:

If you are not giving export default then it throws an error. check if you have given module.exports = Speaker; //spelling mistake here you have written exoprts and check in all the modules whether you have exported correct.

回答7:

There is an stable release on the react-router-dom (v5) with the fix for this issue.

link to github issue

回答8:

I solved this issue by doing this:

instead of

<Route path="/" component={HomePage} />

do this

<Route
 path="/" component={props => <HomePage {...props} />} />

回答9:

In my case i leave my .js file empty means i never write anything in my .js file after that i was using it in my route so make function component or class component and finally export it will work

回答10:

This question is a bit old, but for those still arriving here now and using react-router 4.3 it's a bug and got fixed in the beta version 4.4.0. Just upgrade your react-router to version +4.4.0. Be aware that it's a beta version at this moment.

yarn add react-router@next

or

npm install -s react-router@4.4.0-beta.8

回答11:

react-router@3.2.3 also fixed this bug, just update it:

npm i --save react-router

来源：https://stackoverflow.com/questions/33950433/warning-failed-proptype-invalid-prop-component-supplied-to-route