WatchScroll

winHeight

window.screen.availHeight

ScrollState

<hfq-img
                :imgs="scope.row.thumb_img"
                :resourceUrl="resourceUrl"
                :WatchScroll="true"
                :winHeight="winHeight"
                :ScrollState="ScrollState"
              ></hfq-img>

ScrollState: 0,
      winHeight: 0,

    window.addEventListener("scroll", this.handleScroll, true);

   //滚动事件抓取
    handleScroll() {
      this.winHeight = window.screen.availHeight;
      this.ScrollState = +new Date();
    },