React數(shù)據(jù)獲取為什么一定要在componentDidMount里面調(diào)用
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import React, { Component } from 'react';
class MyCompnent extends Component {
constructor(props) {
super(props);
this.state = {isHover: false};
this.onMouseEnter = this.onMouseEnter.bind(this);
}
componentDidMount() {
$("#aaa").on('hover', ()=> {
$(this).addClass('myHover');
});
}
onMouseEnter() {
this.setState({isHover : true});
}
render() {
const { isHover } = this.state;
return(
);
}
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