我有一个使用上下文API和许多Hooks的现代React应用程序,我使用上下文来存储应用程序的全局值。这些值或上下文本身不应直接重新渲染其他组件。上下文本身具有自己的getter/setter形式,即UseState钩子函数,消费组件从中调用以使用它。如果任何组件依赖于上下文数据,则在此组件本身中创建单独的状态,然后正确处理该状态。 在我的...
Context API in React.js lets you pass data between components without needing to pass it as props through each level of the component tree. It works like a global state management system where you define your state in a context object, and then you can easily access it anywhere in the ...
跟其他react api不是一个层级的东西，位运算这种玩意还是不能交给用户来玩（尤其是页面仔这种高中生都能...
你可以在你的应用程序中添加任意多的Counter组件,并且它将拥有相同的全局状态。 import React from 'react'; import useCustom from './customHook'; const Counter = () => { const [globalState, setGlobalState] = useCustom(); const add1Global = () => { const newCounterValue = globalState.coun...
最近公司做了一个新项目,是后台管理系统,我们没有引入redux,但是其实在某些比较复杂的页面级模块中,组件拆分的层级非常深,所以我想到了可以利用React的Context这个api进行跨层级的数据传递,利用useReducer去做一个简单的store来统一操作模块的数据。 基础用法 Context配合useReducer ...
API，更加精细的使用 context valueExampleimportReact,{useState,useCallback}from"react";importconstate...
import React from 'react'; import { createStore } from 'context-state'; function useCounter() { const [count, setCount] = React.useState(0); const increment = () => setCount((c) => c + 1); return { count, increment, }; } const CounterStore = createStore(useCounter); function ...
For the most part, React and state go hand-in-hand. As your React app grows, it becomes more and more crucial to manage the state.With React 16.8 and the introduction of hooks, the React Context API has improved markedly. Now we can combine it with hooks to mimic react-redux; some ...
PORT=8080 yarn run examples:01_counter and openhttp://localhost:8080in your web browser. You can also try them in codesandbox.io:010203 Projects that use use-context-selector react-tracked use-atom react-hooks-fetch Install npm iuse-context-selector ...
import React, { useState } from "react"; import constate from "constate"; // 1️⃣ Create a custom hook as usual function useCounter() { const [count, setCount] = useState(0); const increment = () => setCount(prevCount => prevCount + 1); return { count, increment }; } /...