Link to context page

Author: Dustin Masters

content/docs/reference-react-component.md

@@ -136,18 +136,18 @@ render() {
 ### `constructor()`
 
 ```javascript
-constructor(props, context)
+constructor(props)
 ```
 
-The constructor for a React component is called before it is mounted. When implementing the constructor for a `React.Component` subclass, you should call `super(props)` before any other statement. Otherwise, `this.props` will be undefined in the constructor, which can lead to bugs. Optionally, if you need access to context in your component, call `super(props, context)`.
+The constructor for a React component is called before it is mounted. When implementing the constructor for a `React.Component` subclass, you should call `super(props)` before any other statement. Otherwise, `this.props` will be undefined in the constructor, which can lead to bugs.
 
 The constructor is the right place to initialize state. If you don't initialize state and you don't bind methods, you don't need to implement a constructor for your React component.
 
 It's okay to initialize state based on props. This effectively "forks" the props and sets the state with the initial props. Here's an example of a valid `React.Component` subclass constructor:
 
 ```js
-constructor(props, context) {
-  super(props, context);
+constructor(props) {
+  super(props);
   this.state = {
     color: props.initialColor
   };
@@ -158,6 +158,15 @@ Beware of this pattern, as state won't be up-to-date with any props update. Inst
 
 If you "fork" props by using them for state, you might also want to implement [`componentWillReceiveProps(nextProps)`](#componentwillreceiveprops) to keep the state up-to-date with them. But lifting state up is often easier and less bug-prone.
 
+Some libraries, such as React Router, may depend on [context](/docs/context.html) being available. If you implement a constructor and need context, make sure to call `super(props, context)`.
+
+```js
+constructor(props, context) {
+  super(props, context);
+  // other component initialization logic
+}
+```
+
 * * *
 
 ### `componentWillMount()`