1.安装element-resize-detector
npm install --save element-resize-detector
2.引入
<script>
import { ref,onMounted,} from 'vue';
import elementResizeDetector from "element-resize-detector";
const scrollHeight = ref('100%')
onMounted(() => {
var erd = elementResizeDetector();
erd.listenTo("监听的dom元素", (element) => {
scrollHeight.value = element.offsetHeight-102
})
})
</script>