vue中默認聚焦的方法、默認按鈕高亮、input聚焦等等

1、原生基礎組件

<button @click="myFocus" ref="toFocus"><button>
this.$refs.toFocus.focus();

2、封裝組件、element組件等

    需要多加一層 .$el

<el-button type="primary" size="mini" @click="routerLink" ref="buttonFocus">信息維護</el-button>
this.$refs.buttonFocus.$el.focus();