4dkankan-components/docs/examples-bk/datetime-picker/default-time.vue

<template>
    <div class="block">
        <span class="demonstration">Start and end date time 12:00:00</span>
        <el-date-picker v-model="value1" type="datetimerange" start-placeholder="Start Date" end-placeholder="End Date" :default-time="defaultTime1" />
    </div>
    <div class="block">
        <span class="demonstration">Start date time 12:00:00, end date time 08:00:00</span>
        <el-date-picker v-model="value2" type="datetimerange" start-placeholder="Start Date" end-placeholder="End Date" :default-time="defaultTime2" />
    </div>
</template>

<script lang="ts" setup>
import { ref } from 'vue'

const value1 = ref('')
const value2 = ref('')

const defaultTime1 = new Date(2000, 1, 1, 12, 0, 0) // '12:00:00'
const defaultTime2: [Date, Date] = [new Date(2000, 1, 1, 12, 0, 0), new Date(2000, 2, 1, 8, 0, 0)] // '12:00:00', '08:00:00'
</script>
<style scoped>
.block {
    padding: 30px 0;
    text-align: center;
    border-right: solid 1px var(--el-border-color);
    flex: 1;
}
.block:last-child {
    border-right: none;
}
.block .demonstration {
    display: block;
    color: var(--el-text-color-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}
</style>