父組件

import React,{ Component } from "react";
import List from "./main";
export default class App extends Component{
    render(){
        return(
            <div>
                <List data = {this.state.list} />
            </div>
        )
    }
}

子組件

import React,{ Component } from "react";
export default React.createClass({
     getInitialState() {
        return {
            data:this.props.data
        };
    },

    componentDidMount() {
        let data = this.props.data;
        console.log(data)
    },
    
    render(){
        return(
            <div>{this.props.data}</div>
        )
    }
    
})

為什么我在子組件 getInitialState 、componentDidMount 里都拿不到父組件傳過來的data但是在渲染的dom結(jié)構(gòu)里可以取到