Component组件拆分&父子组件的传值

import React, {Component, Fragment} from "react";
import ‘./style.css‘
import XiaoItem from "./XiaoItem";

class Xiao extends Component {
    //构造函数,所有数据写在state中,初始化，固定写法
    constructor(props) {
        super(props);
        this.state = {
            inputValue:‘jsPang‘,
            list:[‘基础‘, ‘升级1‘]
        }
    }

    render() {
        return (
            <Fragment>
                {/*第一次写注释*/}
                <div>
                    <label htmlFor="jsPang">增加服务：</label>
                    <input id="jsPang" className="input" value={this.state.inputValue} onChange={this.inputChange.bind(this)}/>
                    <button onClick={this.addList.bind(this)}>增加</button>
                </div>
                <ul>
                    {this.state.list.map((item,index)=>{
                        return (
                                <XiaoItem
                                    key={item+index}
                                    content={item}
                                    index={index}
                                    deleteItem={this.deleteItem.bind(this)}
                                />
                        )
                    })}
                </ul>
            </Fragment>

        );
    }
    inputChange(e){
        this.setState({
            inputValue: e.target.value
        })
    }
    //增加列表
    addList(e){
        this.setState({
            // ...表示扩展运算符，相当于list:[‘基础‘, ‘升级1‘, this.state.inputValue]
            list:[...this.state.list, this.state.inputValue],
            inputValue:‘‘
        })
    }
    // 删除列表项目
    deleteItem(index){
        console.log(index)
        // 声明局部list
        let list = this.state.list
        list.splice(index, 1)
        this.setState({
            list:list
        })
    }
}
//组件暴露，让外界引用
export default Xiao

import React, {Component} from "react";

class XiaoItem extends Component{
    constructor(props) {
        super(props);
        this.handleClick = this.handleClick.bind(this)
    }
    render() {
        return (
            <li onClick={this.handleClick}>{this.props.content}</li>
        )

    }
    handleClick(){
        this.props.deleteItem(this.props.index)
    }
}

export default XiaoItem