废话少说，上干货：
- template
<el-input ref="inputRef"/>
<el-time-piker ref="timepikerRef"/>
- js:
import { ref } from 'vue'
- el-inpt:
const inputRef = ref(null)
input.value.focus()
- el-time-piker:
const timepikerRef = ref(null)
timepikerRef.value.focus(true)