<el-date-picker
  v-model="taskTime"
  type="datetimerange"
  range-separator="-"
  start-placeholder="开始时间"
  end-placeholder="结束时间"
  @change="handleTimeChange" />

js

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

const taskTime = ref()
const handleTimeChange = (value: any[]) => {
  if (value && value[1]) {
    const endTime = value[1]
    if (
      endTime.getHours() === 0 &&
      endTime.getMinutes() === 0 &&
      endTime.getSeconds() === 0
    ) {
      endTime.setHours(23)
      endTime.setMinutes(59)
      endTime.setSeconds(59)
      taskTime.value = [taskTime.value[0], endTime]
    }
  }
}
</script>