setTimeout(()=>{
? ? this.$refs.aside.focus()
},100)

<div tabindex="0" hidefocus="true" ref="aside" class="aside" @click="dialaing()" @blur='()=>{dialaingIsShow =false}'>
? ? <div v-show="dialaingIsShow" class="dialaing">dsadasd</div>
</div>

dialaing(){
? ? ? ?this.$refs.aside.focus()
? ? ? ?this.dialaingIsShow = true
},

<div tabindex="0" @blur="aside1_hide()" ref="aside1" class="aside" style="width: 200px; overflow: scroll;">
    <!-- background-color="#23303E" transparent -->
    <el-menu background-color="#23303E" text-color="#fff" active-text-color="#fff">
       ...
    </el-menu>
</div>

left_click: function() {
      if (!this.left_show) {
        this.$refs.aside1.style.left = "0"
        this.$refs.aside1.focus()  //獲得焦點(diǎn)
        this.left_show = true
      } else {
        this.aside1_hide()
      }
},
 
aside1_hide:function () {
      this.$refs.aside1.style.left = "-200px"
      this.left_show = false
},

 
@media screen and (min-width: 1200px) {
  .aside {
    position: static;
    width: 200px;
    height: 100vh;
    margin: 0;
    padding: 0;
    background-color: #23303E;
    z-index: 100;
    /*移動時的過度效果*/
    transition: left 500ms ease;
    color: #fff;
  }
}
 
@media screen and (max-width: 1200px) {
  /*隱藏在左邊*/
  .aside {
    position: fixed;
    /*相對于窗口固定定位*/
    top: 0;
    left: -200px;
    /*隱藏在左邊*/
    width: 200px;
    height: 100vh;
    margin: 0;
    padding: 0;
    background-color: #23303E;
    z-index: 100;
    /*移動時的過度效果*/
    transition: left 500ms ease;
 
    /*padding: 36px;*/
    color: #fff;
  }
}
/*可以滾動，但隱藏滾動條*/
.aside::-webkit-scrollbar {
  display: none;
}