移动端H5长按事件

import Vue from 'vue'

Vue.directive('longpress', function (el, binding){
 // if (typeof binding.value !== 'function') {
 //   throw Error(binding.value + '不是函数')
 // }
 // Make sure expression provided is a function
  if (typeof binding.value !== 'function') {
  // Fetch name of component
     const compName = vNode.context.name
  // pass warning to console
     let warn = `[longpress:] provided expression '${binding.expression}' is not a function, but has to be`
   	 if (compName) { warn += `Found in component '${compName}' ` }
   		console.warn(warn)
   	 }
       let pressTimer = null
            // 开始按下
            let start = (e) => {
              // 如果是点击事件，不启动计时器，直接返回
              if (e.type === 'click' && e.button !== '0') {
                return
              }
              if (pressTimer == null) {
                // 创建定时器 （2s之后执行长按功能韩函数）
                pressTimer = setTimeout(() => {
                  binding.value() // 执行长按功能函数
                }, 2000)
              }
            }
            // 取消按下
            let cancel = (e) => {
              if (pressTimer != null) {
                clearTimeout(pressTimer)
                pressTimer = null
              }
            }
            // 添加事件监听器
            el.addEventListener("mousedown", start)
            el.addEventListener("touchstart", start)
            // 取消计时器
            el.addEventListener("click", cancel);
            el.addEventListener("mouseout", cancel);
            el.addEventListener("touchend", cancel);
            el.addEventListener("touchcancel", cancel);
 })

1.在src目录下 新建文件夹utils文件夹，然后新建derective.js，复制上方代码，粘贴到derective.js；
2.在main.js中引入 该自定义指令js
3.在html中可以这样使用即可

<div id="touchId" v-longpress="touchStar" :class="tipShow == true ? 'tips' : ''" :data-content="tip">长按触发</div>

传送门：测试demo完整代码