utils/debounce.js

/*** 防抖函数* @param {*} fn 函数* @param {*} delay 暂停时间* @returns */
export function debounce(fn, delay = 500) {let timer = nullreturn function (...args) {// console.log(arguments);// const args = Array.from(arguments)if (timer) {clearTimeout(timer)}timer = setTimeout(() => {fn.apply(this, args)}, delay)}}

main.js 定义全局化指令

import { createApp } from 'vue'
import App from './App.vue'
import { debounce } from './utils/debounce'const app = createApp(App)// 创建全局指令
app.directive('debounce', {mounted(el, binding) {const { value, arg } = bindingconst debouncedFn = debounce(value, arg)el.addEventListener('click', debouncedFn) // 将事件改为click},beforeUnmount(el, binding) {const { value } = bindingel.removeEventListener('click', value)}
})app.mount('#app')

指令的使用

<template><button v-debounce="handleInput" :delay="500">无参</button><button v-debounce="() => handleInput2(1, 2)" :delay="500">传参</button>
</template>
<script>export default{methods: {handleInput(){console.log('防抖指令的使用');},handleInput2(v1, v2){console.log('接收参数', v1,v2);},}}
</script>