el-button autofocus 無效(解決辦法)

<el-button type="primary" autofocus="true" v-focus round plain>日常檢查</el-button>

directives: {
      focus: {
         inserted: function(el) {
           el.focus();
         }
     }
}

上面的方法就可以達到我開始想要的效果 ( v-focus )