Modify the elementui time from the default time x year x month x day 00:00:00 - x year x month x day 23:59:59

After receiving the customer's request, let the last date and time of the default time in the time control be 23:59:59 after the first selection and the previous one is 00:00:00
Add change event Add: picker-options="pickerOptions "

 			<el-date-picker
                  style="width: 100%"
                  v-model="form.Timeorder"
                  type="datetimerange"
                  value-format="yyyy-MM-dd HH:mm:ss"
                  @change="changeTimer"
                  :picker-options="pickerOptions"
                  range-separator="-"
                  start-placeholder="开始日期"
                  end-placeholder="结束日期"
                >
                </el-date-picker>

Add in pickerOptions in data

timeDate :'',
  pickerOptions ： {
    onPick: ({ end , start}) => {
      if (start) {
        this.choiceDate = start.getTime()
      }
      if (end ) {
        document.getElementsByClassName('el-date-range-picker__time-picker-wrap')[3].getElementsByClassName('el-input__inner')[0].value = '23:59:59'
        this.timeDate= ''
      }
    },
  }

Process value in changeTimer event

changeTimer() {
    let value
    if (this.form.Timeorder) {
      value = new Date(this.form.Timeorder[1])
      if (value.getHours() === 0 && value.getMinutes() === 0 && value.getSeconds() === 0) {
        let year = value.getFullYear()
        let month = value.getMonth()
        let date = value.getDate()
        this.form.Timeorder[1] = `${year}-${month}-${date} 23:59:59`
      }
    }
  }

Thanks to element ui datetimepicker How to modify the default time 00:00:00 that appears after clicking on the date? The answer on the second floor of the middle