网页上图片飘动

谁践踏了优雅 2022-10-01 10:40 176阅读 0赞

// 页面结构
    <div id="FloatDiv"></div>
    // 样式
    #FloatDiv { 
        position: absolute; 
        z-index: 1;
        width: 50px; 
        height: 50px; 
        background-color: #7e77ff; 
    }
    // 方法
    startFloat () {
            let FloatDiv = document.getElementById('FloatDiv')
            FloatDiv.visibility = "visible"
            let xPos = 400
            let yPos = 300
            let height = 0
            let Hoffset = 0
            let Woffset = 0
            let yon = 0
            let xon = 0
            function move() {
              let width = document.documentElement.clientWidth;
              height = document.documentElement.clientHeight;
              Hoffset = FloatDiv.offsetHeight;
              Woffset = FloatDiv.offsetWidth;
              FloatDiv.style.left = (xPos + document.body.scrollLeft + document.documentElement.scrollLeft) + "px";
              FloatDiv.style.top = (yPos + document.body.scrollTop + document.documentElement.scrollTop) + "px";
              if (yon) {
                yPos = yPos + 1;
              } else {
                yPos = yPos - 1;
              }
              if (yPos < 0) {
                yon = 1;
                yPos = 0;
              }
              if (yPos >= (height - Hoffset)) {
                yon = 0;
                yPos = (height - Hoffset);
              }
              if (xon) {
                xPos = xPos + 1;
              } else {
                xPos = xPos - 1;
              }
              if (xPos < 0) {
                xon = 1;
                xPos = 0;
              }
              if (xPos >= (width - Woffset)) {
                xon = 0;
                xPos = (width - Woffset);
              }
            }
            this.timer = setInterval(move, 40);
            let that = this
            FloatDiv.onmouseover = function () {
              clearInterval(that.timer);
            }
            FloatDiv.onmouseout = function () {
              that.timer = setInterval(move, 40);
            }
          },
    // 渲染完DOM后调用
    this.startFloat()
    复制代码

转载于:https://juejin.im/post/5c6d03f06fb9a049d81c6d34