Add withRouter HoC (#3352)

* Create a withRouter HoC.

* withRouter passes this.props.router

* Update docs, examples, and upgrade guide.

Also add an export of withRouter

* Doc tweaks.

* Remove displayNames.

Author: timdorr

docs/API.md

@@ -4,6 +4,7 @@
   - [`<Router>`](#router)
   - [`<Link>`](#link)
   - [`<IndexLink>`](#indexlink)
+  - [`withRouter`](#withRouter-component)
   - [`<RouterContext>`](#routercontext)
     - [`context.router`](#contextrouter)
   - `<RoutingContext>` (deprecated, use `<RouterContext>`)
@@ -162,6 +163,9 @@ Given a route like `<Route path="/users/:userId" />`:
 ### `<IndexLink>`
 An `<IndexLink>` is like a [`<Link>`](#link), except it is only active when the current route is exactly the linked route. It is equivalent to `<Link>` with the `onlyActiveOnIndex` prop set.
 
+### `withRouter(component)`
+A HoC (higher-order component) that wraps another component to provide `this.props.router`. Pass in your component and it will return the wrapped component.
+
 ### `<RouterContext>`
 A `<RouterContext>` renders the component tree for a given router state. Its used by `<Router>` but also useful for server rendering and integrating in brownfield development.
 
@@ -171,61 +175,6 @@ It also provides a `router` object on [context](https://facebook.github.io/react
 
 Contains data and methods relevant to routing. Most useful for imperatively transitioning around the application.
 
-To use it, you must signal to React that you need it by declaring your use of it in your component via `contextTypes`:
-
-```js
-var MyComponent = React.createClass({
-  contextTypes: {
-    router: routerShape.isRequired
-  },
-
-  render: function() {
-    // Here, you can use this.context.router.
-  }
-})
-```
-
-To use `context.router` on a component declared as an ES2015 class, define `contextTypes` as a static property of the class:
-
-```js
-class MyComponent extends React.Component {
-  render() {
-    // Here, you can use this.context.router.
-  }
-}
-
-MyComponent.contextTypes = {
-  router: routerShape.isRequired
-}
-```
-
-If you are using the class properties proposal, you can instead write:
-
-```js
-class MyComponent extends React.Component {
-  static contextTypes = {
-    router: routerShape.isRequired
-  }
-
-  render() {
-    // Here, you can use this.context.router.
-  }
-}
-```
-
-To use `context.router` with
-[stateless function components](https://facebook.github.io/react/docs/reusable-components.html#stateless-functions), declare `contextTypes` as a static property of the component function:
-
-```js
-function MyComponent(props, context) {
-  // Here, you can use context.router.
-}
-
-MyComponent.contextTypes = {
-  router: routerShape.isRequired
-}
-```
-
 ##### `push(pathOrLoc)`
 Transitions to a new URL, adding a new entry in the browser history.
 

docs/Troubleshooting.md

@@ -1,16 +1,17 @@
 # Troubleshooting
 
-### `this.context.router` is `undefined`
+### How do I add `this.props.router` to my component?
 
-You need to add `router` to your component's `contextTypes` to make the router object available to you.
+You need to wrap your component using `withRouter` to make the router object available to you.
 
 ```js
-contextTypes: {
-  router: routerShape.isRequired
-}
+const Component = withRouter(
+  React.createClass({
+    //...
+  })
+)
 ```
 
-
 ### Getting the previous location
 
 ```js

docs/guides/ConfirmingNavigation.md

@@ -3,24 +3,22 @@
 You can prevent a transition from happening or prompt the user before leaving a [route](/docs/Glossary.md#route) with a leave hook.
 
 ```js
-const Home = React.createClass({
+const Home = withRouter(
+  React.createClass({
 
-  contextTypes: {
-    router: routerShape.isRequired
-  },
+    componentDidMount() {
+      this.props.router.setRouteLeaveHook(this.props.route, this.routerWillLeave)
+    },
 
-  componentDidMount() {
-    this.context.router.setRouteLeaveHook(this.props.route, this.routerWillLeave)
-  },
+    routerWillLeave(nextLocation) {
+      // return false to prevent a transition w/o prompting the user,
+      // or return a string to allow the user to decide:
+      if (!this.state.isSaved)
+        return 'Your work is not saved! Are you sure you want to leave?'
+    },
 
-  routerWillLeave(nextLocation) {
-    // return false to prevent a transition w/o prompting the user,
-    // or return a string to allow the user to decide:
-    if (!this.state.isSaved)
-      return 'Your work is not saved! Are you sure you want to leave?'
-  },
+    // ...
 
-  // ...
-
-})
+  })
+)
 ```

docs/guides/NavigatingOutsideOfComponents.md

@@ -1,6 +1,6 @@
 # Navigating Outside of Components
 
-While you can use `this.context.router` to navigate around, many apps want to be able to navigate outside of their components. They can do that with the history the app gives to `Router`.
+While you can use `this.props.router` from `withRouter` to navigate around, many apps want to be able to navigate outside of their components. They can do that with the history the app gives to `Router`.
 
 ```js
 // your main file that renders a Router

examples/auth-flow-async-with-query-params/app.js

@@ -1,7 +1,7 @@
 import React, { createClass } from 'react'
 import { render } from 'react-dom'
 import {
-  Router, Route, IndexRoute, browserHistory, Link, routerShape
+  Router, Route, IndexRoute, browserHistory, Link, withRouter
 } from 'react-router'
 
 function App(props) {
@@ -12,43 +12,42 @@ function App(props) {
   )
 }
 
-const Form = createClass({
-  contextTypes: {
-    router: routerShape.isRequired
-  },
+const Form = withRouter(
+  createClass({
 
-  getInitialState() {
-    return {
-      value: ''
-    }
-  },
-
-  submitAction(event) {
-    event.preventDefault()
-    this.context.router.push({
-      pathname: '/page',
-      query: {
-        qsparam: this.state.value
+    getInitialState() {
+      return {
+        value: ''
       }
-    })
-  },
+    },
 
-  handleChange(event) {
-    this.setState({ value: event.target.value })
-  },
+    submitAction(event) {
+      event.preventDefault()
+      this.props.router.push({
+        pathname: '/page',
+        query: {
+          qsparam: this.state.value
+        }
+      })
+    },
 
-  render() {
-    return (
-      <form onSubmit={this.submitAction}>
-        <p>Token is <em>pancakes</em></p>
-        <input type="text" value={this.state.value} onChange={this.handleChange} />
-        <button type="submit">Submit the thing</button>
-        <p><Link to="/page?qsparam=pancakes">Or authenticate via URL</Link></p>
-        <p><Link to="/page?qsparam=bacon">Or try failing to authenticate via URL</Link></p>
-      </form>
-    )
-  }
-})
+    handleChange(event) {
+      this.setState({ value: event.target.value })
+    },
+
+    render() {
+      return (
+        <form onSubmit={this.submitAction}>
+          <p>Token is <em>pancakes</em></p>
+          <input type="text" value={this.state.value} onChange={this.handleChange} />
+          <button type="submit">Submit the thing</button>
+          <p><Link to="/page?qsparam=pancakes">Or authenticate via URL</Link></p>
+          <p><Link to="/page?qsparam=bacon">Or try failing to authenticate via URL</Link></p>
+        </form>
+      )
+    }
+  })
+)
 
 function Page() {
   return <h1>Hey, I see you are authenticated. Welcome!</h1>

examples/auth-flow/app.js

@@ -1,6 +1,6 @@
 import React from 'react'
 import { render } from 'react-dom'
-import { browserHistory, Router, Route, Link, routerShape } from 'react-router'
+import { browserHistory, Router, Route, Link, withRouter } from 'react-router'
 import auth from './auth'
 
 const App = React.createClass({
@@ -55,51 +55,49 @@ const Dashboard = React.createClass({
   }
 })
 
-const Login = React.createClass({
+const Login = withRouter(
+  React.createClass({
 
-  contextTypes: {
-    router: routerShape.isRequired
-  },
-
-  getInitialState() {
-    return {
-      error: false
-    }
-  },
-
-  handleSubmit(event) {
-    event.preventDefault()
-
-    const email = this.refs.email.value
-    const pass = this.refs.pass.value
-
-    auth.login(email, pass, (loggedIn) => {
-      if (!loggedIn)
-        return this.setState({ error: true })
-
-      const { location } = this.props
-
-      if (location.state && location.state.nextPathname) {
-        this.context.router.replace(location.state.nextPathname)
-      } else {
-        this.context.router.replace('/')
+    getInitialState() {
+      return {
+        error: false
       }
-    })
-  },
-
-  render() {
-    return (
-      <form onSubmit={this.handleSubmit}>
-        <label><input ref="email" placeholder="email" defaultValue="[email protected]" /></label>
-        <label><input ref="pass" placeholder="password" /></label> (hint: password1)<br />
-        <button type="submit">login</button>
-        {this.state.error && (
-          <p>Bad login information</p>
-        )}
-      </form>
-    )
-  }
-})
+    },
+
+    handleSubmit(event) {
+      event.preventDefault()
+
+      const email = this.refs.email.value
+      const pass = this.refs.pass.value
+
+      auth.login(email, pass, (loggedIn) => {
+        if (!loggedIn)
+          return this.setState({ error: true })
+
+        const { location } = this.props
+
+        if (location.state && location.state.nextPathname) {
+          this.props.router.replace(location.state.nextPathname)
+        } else {
+          this.props.router.replace('/')
+        }
+      })
+    },
+
+    render() {
+      return (
+        <form onSubmit={this.handleSubmit}>
+          <label><input ref="email" placeholder="email" defaultValue="[email protected]" /></label>
+          <label><input ref="pass" placeholder="password" /></label> (hint: password1)<br />
+          <button type="submit">login</button>
+          {this.state.error && (
+            <p>Bad login information</p>
+          )}
+        </form>
+      )
+    }
+  })
+)
 
 const About = React.createClass({
   render() {

examples/auth-with-shared-root/components/Login.js

@@ -1,12 +1,8 @@
 import React from 'react'
+import { withRouter } from 'react-router'
 import auth from '../utils/auth.js'
 
 const Login = React.createClass({
-
-  contextTypes: {
-    router: React.PropTypes.object
-  },
-
   getInitialState() {
     return {
       error: false
@@ -26,9 +22,9 @@ const Login = React.createClass({
       const { location } = this.props
 
       if (location.state && location.state.nextPathname) {
-        this.context.router.replace(location.state.nextPathname)
+        this.props.router.replace(location.state.nextPathname)
       } else {
-        this.context.router.replace('/')
+        this.props.router.replace('/')
       }
     })
   },
@@ -48,4 +44,4 @@ const Login = React.createClass({
 
 })
 
-export default Login
+export default withRouter(Login)