Vue动态获取width的方法

<div class="progress">
 <div class="progress-bar progress-bar-warning" role="progressbar"
  aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"
  style="width: 20%;">
 <span class="sr-only">20%</span>
 </div>
</div>

:style="'width:' + percent + '%'"

<el-input auto-plete="off" v-model="pany.panyName" ref="panyStyle"></el-input>

newAddBtn(){
 let me = this;
 this.$nextTick(function () {
  me.inputStyWidth = me.$refs.panyStyle.$el.clientWidth + 'px';
 
 })