ref
import React from 'react';
class App extends React.Component {
constructor(props) {
super(props);
this.myref=React.createRef();
}
componentDidMount(){
this.myref.current.style.backgroundColor="#000"
}
render() {
return (
<input ref={this.myref} defaultValue="我是输入框" style={{color:'white'}}/>
);
}
}
export default App;