原生聚焦:autofocus="autofocus"
<input type="text" id="username" name="username" autofocus="autofocus"/>
vue聚焦:this.$refs.input.focus()
<input type="text" placeholder="说些什么吧" ref="input" />
mounted() {
this.$nextTick(() => {
this.$refs.input.focus();
});
},
原文：https://www.cnblogs.com/yx1102/p/13237980.html