vue 监听屏幕高度的实例

data (){
  return {
    fullHeight: document.documentElement.clientHeight
  }
}

mounted() {
   const that = this
   window.  = () => {
    return (() => {
     window.fullHeight = document.documentElement.clientHeight
     that.fullHeight = window.fullHeight
    })()
   }
  }

 watch: {
   fullHeight (val) {
    if(!this.timer) {
     this.fullHeight = val
     this.timer = true
     let that = this
     setTimeout(function (){
      that.timer = false
     },400)
    }
   }
  }