1.在入口文件main.js中：
//防抖函数
export let debounce = (() => {let instances = []return function (fun, delay = 300) {//项目中，多个地方用到防抖，进行判断，每次调用全局的防抖函数，是否是同一块代码const stackLines = new Error().stack.split('\n');let callerLine = stackLines[2];//判断数组中是否有了let index = instances.findIndex(item => {return item.callerLine == callerLine})if (index < 0) {//没有的话，直接新增一个instances.push({ callerLine, fun, delay, timer: null })index = instances.length - 1} else {//有了的话，直接将传递的逻辑函数赋值进去instances[index].fun = fun}//找到数据中对应的对象let instance = instances[index]let ctx = thislet args = arguments//有时间间隔器，则清除if (instance.timer) {clearTimeout(instance.timer)}//进行其他逻辑instance.timer = setTimeout(() => {instance.timer = nullinstance.fun.apply(ctx, args)}, instance.delay)}
})()//节流函数
export let throttle = (() => {let instances = []return function (fun, delay = 300) {const stackLines = new Error().stack.split('\n');let callerLine = stackLines[2];let index = instances.findIndex(item => {return item.callerLine == callerLine})if (index < 0) {instances.push({ callerLine, fun, delay, timeout: null })index = instances.length - 1} else {instances[index].fun = fun}let instance = instances[index]let args = arguments;//注意如果要传参的话 这句不能省略if (!instance.timeout) {instance.timeout = setTimeout(() => {instance.timeout = null;instance.fun.apply(this, args)}, instance.delay)}}
})()Vue.prototype.$debounce = debounce;
Vue.prototype.$throttle = throttle;
2.页面中使用：
<div id="watch-example"><p>问一个是否的问题:<input v-model="question2"></p><p>{{ answer2 }}</p></div>
data() {return {question2: '',answer2: '请输入问题，否则我无法回答你!'};},
watch: {question2: function (newQuestion, oldQuestion) {this.answer2 = '请等待!';this.$debounce(this.getAnswer2, 1000);}},
getAnswer2: function() {if (this.question.indexOf('?') === -1) {this.answer2 = '请输入疑问句!';return;}else{this.answer2 = '请稍后...';setTimeout(() => {this.answer2 = '章总';}, 1000)}}
