import React, { Component } from 'react';
//不受状态控制
class NoControlInput extends Component {
constructor(props){
super(props);
this.state = {
val:''
}
}
handlechange =(e)=>{
let val = this.refs.a.value;
this.setState({val})
}
render() {
return (
<div>
<input type="text" onChange={this.handlechange} ref='a'/>
<h2>{this.state.val}</h2>
</div>
);
}
}
export default NoControlInput;
我称之为表面双向数据绑定
