import React,{Component} from 'react';
class RepeatArrayextends Component{
 constructor() {  super();
 }
 render(){
  const names = ['Alice', 'Emily', 'Kate'];
  return (
   <div>
   {
    names.map((name) =>{return <div>Hello, {name}!</div>;} )
   }
   </div>
);
}
}
export default RepeatArray;

import React,{Component} from 'react';
class RepeatLiextends Component{
 render(){
  return (
   <ol>
   {
    this.props.children.map((child)=>{return <li>{child}</li>})
   }
   </ol>
);
}
}
class RepeatArray extends Component{
constructor() {
super();
}
render(){
return (
<div>
<RepeatLi>
<span>hello</span>
    <span>world</span>
</RepeatLi>
   </div>
);
}
}
export default RepeatArray;

import React,{Component} from 'react';
class UserGistextends Component{
 constructor(){
  super();
  this.state={
   username:'',
   lastGistUrl:''
  }
 }
 componentWillMount(){
  $.get(this.props.source, function(result){
   var lastGist = result[0];
   //if (this.isMounted()) {
    this.setState({
     username: lastGist.owner.login,
     lastGistUrl: lastGist.html_url
    });
   //}
  }.bind(this));
 }
 render(){
  return(
   <div>
    {this.state.username} ..
    <a href={this.state.lastGistUrl} >here</a>
</div>
  );
 }
}
class RepeatArrayextends Component{
 constructor() {
  super();
 }
 render(){
  return (
   <div>
   <UserGist source="https://api.github.com/users/octocat/gists" />
   </div>
);
}
}
export default RepeatArray;

class Videoextends React.Component{
  constructor(props){
    super(props);
    this.state = {
      loopsRemaining: this.props.maxLoops,
    };
  }
}

class AutoloadingPostsGridextends React.Component{
  render() {
    var {
      className,
      ...others, // contains all properties of this.props except for className
    } = this.props;
    return (
      <div className={className}>
        <PostsGrid {...others} />
        <button onClick={this.handleLoadMoreClick}>Load more</button>
</div>
    );
  }
}

class MyComponentextends React.Component{
//假设MyComponent已经有了name和age属性
 render(){
  return (
   <SubComponent name={this.props.name} age={this.props.age}/>
   )
 }
}

class MyComponentextends React.Component{
//假设MyComponent已经有了name和age属性
 render(){
  return (
   <SubComponent {...this.props}/>
   )
 }
}

class MyComponentextends React.Component{
//假设MyComponent有很多属性，而name属性不需要传递给子组件
 var {name,...MyProps}=this.props;
 render(){
  return (
   <SubComponent {...Myprops}/>
   )
 }
}

import React,{Component} from "react";
class MyComponentextends Component{
//组件内部代码
}

class MyComponentextends React.Component{}
MyComponent.defaultProps={
 name:"SunnyChuan",
 age:22
};
MyComponent.propTypes={
 name:React.PropTypes.string.isRequired,
 age:React.PropTypes.number.isRequired
};

class MyComponentextends React.Component{
 static defaultProps={
  name:"SunnyChuan",
  age:22
 }
 static propTypes={
  name:React.PropTypes.string.isRequired,
  age:React.PropTypes.number.isRequired
 }
}

class MyComponentextends React.Component{
 static defaultProps={
  name:"SunnyChuan",
  age:22
 }
 state={
   isMarried:false
 }
 static propTypes={
  name:React.PropTypes.string.isRequired,
  age:React.PropTypes.number.isRequired
 }
}

function App1(){
 return <GreetingfirstName="Ben"lastName="Hector"/>;
}
function App2() {
const props = {firstName: 'Ben', lastName: 'Hector'};
 return <Greeting {...props} />;
}

this.setState({
  [name]:value
})
//代替
var partialState = {};
partialState[name] = value;
this.setState(partialState);