类中的方法内部的this指向 在用react实现一个点击切换内容小demo时的，发现类中方法内部的this是指向undefined的。 代码如下： <div id="test"></div><script type="text/javascript" src="../JS/react.development.js"></script><script type="text/javascript" src="../JS/react-dom.development.js"></script><script type="text/javascript" src="../JS/babel.min.js"></script><script type="text/babel">class Weather exte...
/*** 1.子组件 child.js*/import React, { Component } from reactexport default class Child extends Component {constructor(props) {super(props)this.state = {}//如果父组件传来该方法 则调用方法将子组件this指针传过去if (props.onRef) {props.onRef(this)}}editRowEvt = (row) => {console.log(父组件调用子组件方法, row)} }/*** 2.父组件 parent.js*/import React, { Component } from react import ChildPage from ./c...