es6在react中的应用代码解析

不论是React还是React-native,facebook官方都推荐使用ES6的语法,没在项目中使用过的话,突然转换过来会遇到一些问题,如果还没有时间系统的学习下ES6那么注意一些常见的写法暂时也就够用的,这会给我们的开发带来很大的便捷,你会体验到ES6语法的无比简洁。下面给大家介绍es6在react中的应用,具体内容如下所示:

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;

二、ol与li的实现

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;

三、从服务端获取数据

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;

四、初始化STATE

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

五、解构与扩展操作符

在给子组件传递一批属性更为方便了。下面的例子把 className 以外的所有属性传递给 div 标签

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>
    );
  }
}
      

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