接下来,你可以在任何React组件中使用这个store: import React from 'react'; import { useStore } from 'costore'; function Counter() { const { count, increment, decrement } = useStore(store); return ( <div> <p>Count: {count}</p> <button onClick={increment}>Increment</button> <button on...
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= (...
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...
<button onClick={increment}>Increment</button> <button onClick={decrement}>Decrement</button> </div> ); } export default Counter; 在本例中,Counter组件封装了状态(count)和方法(increment decrement)。这些数据和函数被封装在组件内,无法从外部直接访问。这就防止了对组件内部数据和函数的未经授权的访问,...
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...
<button onClick={increment}>Increment</button> <button onClick={decrement}>Decrement</button> </div> ); } export default Counter; 在上面的示例中,我们创建了一个名为"useCounter"的自定义钩子,它返回了一个包含计数器状态和增减函数的对象。在组件中使用这个自定义钩子,可以轻松地实现计数器的功能。
<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); // App 组件 const App = () => { ...
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...
const { value, onIncrement, onDecrement } = this.props; return ( <p> Clicked: { value} times <br /> <button onClick={onIncrement}> + </button> <button onClick={onDecrement}> - </button> </p> ) } } // mapStateToProps将当前store里的数据以我们的组件需要的形式传递到组件 ...
<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> ...