import { create } from 'zustand';const useCountStore = create((set) => ({ count: 0, increment: (qty) => set((state) => ({ count: state.count + qty })), decrement: (qty) => set((state) => ({ count: state.count - qty })),}));const Component = () => { cons...
return (<div><p>Count: {state.count}</p><buttononClick={increment}>Increment</button><buttononClick={decrement}>Decrement</button></div>); }; useCallback:用于在函数组件中缓存回调函数,以避免不必要的重新创建。 import React, { useState, useCallback } from 'react'; const Counter= (...
<h1>Counter: {count}</h1> <button onClick={increment}>Increment</button> <button onClick={decrement}>Decrement</button> </div> ); }; // 将 Counter 组件连接到 Redux store const ConnectedCounter = connect( state => ({ count: state.count }), { increment, decrement } )(Counter); //...
const { counter = 0, increment, decrement } = useContext(context1); const { status } = useContext(context2); 完整代码 代码语言:javascript 代码运行次数:0 运行 AI代码解释 import React, { useContext } from 'react'; import { Button } from 'antd-mobile'; import { context, CounterProvider }...
import React, { useState } from 'react'; function Counter() { const [count, setCount] = useState(0); const increment = () => { setCount(count + 1); }; const decrement = () => { setCount(count - 1); }; return ( <div> <p>当前值:{count}</p> <button onClick={increment...
import { useModel } from 'umi'; export default () => { const { add, minus } = useModel('counterModel', (model) => ({ add: model.increment, minus: model.decrement, })); return ( <div> <button onClick={add}>add by 1</button> <button onClick={minus}>minus by 1</button>...
<button onClick={increment}>Increment</button> </div> ); } function CounterComponent2() { const { count, decrement } = useSharedCounter(100); return ( <div> <p>Counter in Component 2: {count}</p> <button onClick={decrement}>Decrement</button> ...
export default connect( state => ({count: state.count, personLength: state.persons.length}), { increment: createIncrementAction, decrement: createDecrementAction, asyncIncrement: createIncrementAsyncAction, } )(Count); 8. 文件规范 9. 再说一遍,能不用就别用这东西!!二.React16.8 与一些扩展...
import React from 'react'; import { connect } from 'react-redux'; import { increment, decrement } from './actions'; class Counter extends React.Component { render() { const { count, increment, decrement } = this.props; return ( <div> <p>Count: {count}</p> <button onClick={increm...
// Usage<Button /> 16. 批量更新 问题: 快速连续多次更新状态会导致多次重新渲染,从而导致性能问题。 解决方案: React 批量更新状态以优化渲染。当状态依赖于先前的值时,使用功能更新以确保使用最新状态。 ```jsxconst Counter = () => {const ...