React通过conetxt实现多组件传值功能

该功能实现效果类似于vue的provide/inject
而React可通过context进行完成

定义一个公共的文件context/Theme.jsx

import { createContext } from 'react';
const theme = createContext()
export default theme

父组件引入公共文件及子组件
并传递theme值

import React, { useState } from 'react';
import Child from "@/components/Child.jsx"
import Theme from "@/context/Theme.jsx"
export default () => {
    const [theme, setTheme] = useState("blue")
    return (
        <>
            <button onClick={() => setTheme("green")}>检验context是否为响应式</button>
            <Theme.Provider value={theme}>
                <Child />
            </Theme.Provider>
        </>
    )
}

子组件获取数据components/Child.jsx

import React from 'react';
import Theme from "@/context/Theme.jsx"
export default () => {
    return (
        <Theme.Consumer>
            {data => <p>接收父组件context传递的值：{data}</p>}
        </Theme.Consumer>
    );
}

React通过conetxt实现多组件传值功能

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