如何利用原生JS实现触摸滑动监听事件

let box = document.querySelector('body') // 监听对象
let startTime = '' // 触摸开始时间
let startDistanceX = '' // 触摸开始X轴位置
let startDistanceY = '' // 触摸开始Y轴位置
let endTime = '' // 触摸结束时间
let endDistanceX = '' // 触摸结束X轴位置
let endDistanceY = '' // 触摸结束Y轴位置
let moveTime = '' // 触摸时间
let moveDistanceX = '' // 触摸移动X轴距离
let moveDistanceY = '' // 触摸移动Y轴距离
box.addEventListener("touchstart", (e) => {
    startTime = new Date().getTime()
    startDistanceX = e.touches[0].screenX
    startDistanceY = e.touches[0].screenY
})
box.addEventListener("touchend", (e) => {
    endTime = new Date().getTime()
    endDistanceX = e.changedTouches[0].screenX
    endDistanceY = e.changedTouches[0].screenY
    moveTime = endTime - startTime
    moveDistanceX = startDistanceX - endDistanceX
    moveDistanceY = startDistanceY - endDistanceY
    console.log(moveDistanceX, moveDistanceY)
    // 判断滑动距离超过40 且 时间小于500毫秒
    if ((Math.abs(moveDistanceX) > 40 || Math.abs(moveDistanceY) > 40) && moveTime < 500) {
        // 判断X轴移动的距离是否大于Y轴移动的距离
        if (Math.abs(moveDistanceX) > Math.abs(moveDistanceY)) {
        // 左右
        console.log(moveDistanceX > 0 ? '左' : '右')
        } else {
        // 上下
        console.log(moveDistanceY > 0 ? '上' : '下')
        }
    }
})