4. React-Ajax请求 · 面试题

## React ~~~ <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script> <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script> <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script> ~~~ ~~~ <body> <div id="example">{this.state.img}</div> <script type="text/babel"> class Clock extends React.Component{ constructor(props){ super(props); this.state = { msg:"hello world", img:"", title:"" }; } ~~~ ~~~ render(){ return ( <div> <img src={this.state.img} alt=""></img> <h1>{this.state.title}</h1> </div> ) } ~~~ ~~~ componentDidMount(){ var url = "https://douban.uieee.com/v2/movie/top250"; $.ajax({ url, type:"get", dataType:"jsonp", success: res=> { var subjects = res.subjects[0]; var img = subjects.images.small; var title = subjects.title; this.setState(()=>{ return { img, title } }) } }) } } ~~~ ~~~ ReactDOM.render( <Clock />, document.getElementById('example') ); </script> </body> ~~~