vue $ref 获取DOM节点的宽高

<div ref="elememt" ></div>

//获取高度值，纯数字
var width= this.$refs.text.offsetWidth;
var height= this.$refs.text.offsetHeight;

//获取元素样式值,element 为元素ref="element"，字符串
var width = window.getComputedStyle(this.$refs.element).width;
var height = window.getComputedStyle(this.$refs.element).height;

//获取元素内联样式值，字符串
var width =this.$refs.element.style.width;
var height =this.$refs.element.style.height;