Merge pull request #17 from chenglou/feat-documentation-cookbook

fix 3 more entries

cookbook/07-children-prop-type.md

@@ -7,6 +7,41 @@ prev: style-prop-value-px.html
 next: controlled-input-null-value.html
 ---
 
-Usually, a component's `this.props.children` is an array of components. To save an extra array allocation, it returns the component itself when there's only one.
+Usually, a component's `this.props.children` is an array of components:
 
-This means accessing, for example, `this.props.children.length` might be misleading, as it could either be the `length` property of the array of children, or that of a single string component.
+```js
+/** @jsx React.DOM */
+
+var GenericWrapper = React.createClass({
+  componentDidMount: function() {
+    console.log(Array.isArray(this.props.children)); // => true
+  },
+  render: function() {
+    return <div />;
+  }
+});
+
+React.renderComponent(
+  <GenericWrapper><span/><span/><span/></GenericWrapper>, 
+  mountNode
+);
+```
+
+To save an extra array allocation, it returns the component itself _without the array wrapper_ when there's only one child.
+
+```js
+/** @jsx React.DOM */
+
+var GenericWrapper = React.createClass({
+  componentDidMount: function() {
+    // **warning**: yields 5 for length of the string 'hello', not 1 for the
+    // length of the non-existant array wrapper!
+    console.log(this.props.children.length); 
+  },
+  render: function() {
+    return <div />;
+  }
+});
+
+React.renderComponent(<GenericWrapper>hello</GenericWrapper>, mountNode);
+```

cookbook/11-dom-event-listeners.md

@@ -24,10 +24,10 @@ var Box = React.createClass({
     this.setState({windowWidth: window.innerWidth});
   },
   componentDidMount: function() {
-    window.addEventListener("resize", this.handleResize);
+    window.addEventListener('resize', this.handleResize);
   },
   componentWillUnmount: function() {
-    window.removeEventListener("resize", this.handleResize);
+    window.removeEventListener('resize', this.handleResize);
   },
   render: function() {
     return <div>Current window width: {this.state.windowWidth}</div>;

cookbook/12-initial-ajax.md

@@ -41,6 +41,7 @@ var UserGist = React.createClass({
 });
 
 React.renderComponent(
-  <UserGist source="https://api.github.com/users/octocat/gists" />, mountNode
+  <UserGist source="https://api.github.com/users/octocat/gists" />,
+  mountNode
 );
 ```