Element监听某元素宽高的变化

npm install element-resize-detector

<div class="monitorBox" id="monitorBox" > </div>
import elementResizeDetectorMaker from "element-resize-detector";
 mounted() {
    this.erd = elementResizeDetectorMaker();
    this.$nextTick(() => {
      this.erd.listenTo(document.getElementById("monitorBox"), element => {
        this.canvasStyleChange();
      });
    });
  },