获取某元素高度

  <templete>
     <div class="recruitsubstance" ref="recruitDashboardScreen">
         内容
     </div>
  </templete>

  mounted() {
      this.observeElement()
  }，
  data() {
    return {
      tableDataHeight: 0,
    }
  },

  methods: {
    observeElement() {
      const recruitScreen = document.querySelector('.recruitsubstance');
      const observer = new IntersectionObserver(entries => {
        entries.forEach(entry => {
          if (entry.isIntersecting) {
            const elementHeight = entry.target.offsetHeight;
       
            this.tableDataHeight =elementHeight
          } else {
            console.log('Element is out of view');
          }
        });
      });
      observer.observe(recruitScreen);
    },
}