text: var MouseTimeDisplay = videojs.getComponent("MouseTimeDisplay");
  var ProgressControl = videojs.getComponent("ProgressControl");
  
  MouseTimeDisplay.prototype.options_ = {
      children: ["CanvasPanel", "timeTooltip"],
  };
  
  MouseTimeDisplay.prototype.update = function (seekBarRect, seekBarPoint) {
      const time = seekBarPoint * this.player_.duration();
      //console.log(this);
      this.getChild("timeTooltip").updateTime(
          seekBarRect,
          seekBarPoint,
          time,
          () => {
              this.el_.style.left = `${seekBarRect.width * seekBarPoint}px`;
          }
      );
  
      //更新canvasPanel
      this.getChild("canvasPanel").updateTime(time);
  };