Vue

by the94air

HTML

<div id="app">
  <section ref="section"></section>
  <div>{{ height }}</div>
</div>

CSS

section {
  width: 100px;
  height: 100px;
  background: red;
}

Vue

new Vue({
  el: "#app",
  computed: {
    height () {
      this.$nextTick(() => {
        console.log(this.$refs.secion.clientHeight)
      })
    }
  }
})