同标签实现监听LocalStorage

使用 React 生命周期函数 useEffect来监听和处理 LocalStorage 的变化 

import React, { useEffect } from 'react';const LocalStorageListener = () => {useEffect(() => {// 注册监听器const handleStorageChange = (event) => {if (event.key === 'myKey') {console.log('注册监听器', event.newValue);}};// 添加监听器window.addEventListener('storage', handleStorageChange);// 触发监听器const triggerCustomStorageEvent = () => {const storageEvent = new StorageEvent('storage', {key: 'myKey',newValue: 'newValue',url: window.location.href,});window.dispatchEvent(storageEvent);};// 移除监听器return () => {window.removeEventListener('storage', handleStorageChange);};}, []); // 空数组表示在组件挂载时运行return (<div><button onClick={() => localStorage.setItem('myKey', 'newValue')}>修改 localStorage</button><button onClick={() => window.dispatchEvent(new StorageEvent('storage', {key: 'myKey',newValue: localStorage.getItem('myKey'),url: window.location.href,}))}>手动触发 StorageEvent</button></div>);
};export default LocalStorageListener;

使用Vue生命周期钩子 onMounted 和 onUnmounted来监听和处理 LocalStorage 的变化 

<template><div><button @click="updateLocalStorage">修改 localStorage</button><button @click="triggerCustomStorageEvent">手动触发 StorageEvent</button></div>
</template><script lang="ts" setup>
import { onMounted, onUnmounted } from 'vue';
// 注册监听器
const handleStorageChange = (event: StorageEvent) => {if (event.key === 'myKey') {console.log('Detected localStorage change:', event.newValue);}
};const updateLocalStorage = () => {localStorage.setItem('myKey', 'newValue');
};
// 触发监听器
const triggerCustomStorageEvent = () => {const storageEvent = new StorageEvent('storage', {key: 'myKey',newValue: 'newValue',url: window.location.href,});window.dispatchEvent(storageEvent);
};
// 添加监听器
onMounted(() => {window.addEventListener('storage', handleStorageChange);
});
// 移出监听器
onUnmounted(() => {window.removeEventListener('storage', handleStorageChange);
});
</script>