element设置设置日期0点到23：59：59

js方式

var start = new Date(new Date(new Date().toLocaleDateString()).getTime()) // 当前日期0点到23：59：59
var end = new Date(new Date(new Date().toLocaleDateString()).getTime() + 24 * 60 * 60 * 1000 - 1)
console.log(Date.parse(start), Date.parse(end))

element中设置日期

 <el-col :span="14">
            <div class="searchCont">
              <div class="demo-input-suffix">
                <span class="title">采购时间：</span>
                <el-date-picker
                  v-model="purchasetime"
                  size="mini"
                  type="daterange"
                  value-format='timestamp'
                  start-placeholder="开始日期"
                  end-placeholder="结束日期"
                  :default-time="['00:00:00', '23:59:59']"
                  :picker-options="pickerOptions">
                </el-date-picker>
              </div>
            </div>
          </el-col>

pickerOptions: {
      disabledDate(time) {
        // return time.getTime() < new Date(new Date().getFullYear(), new Date().getMonth(), new Date().getDate() + 1, 0, 0, 0).getTime() 不限制日期间隔
        const _now = new Date(new Date().getFullYear(), new Date().getMonth(), new Date().getDate() + 1, 0, 0, 0).getTime()
        const seven = 6 * 24 * 60 * 60 * 1000
        const sevenDays = _now + seven
        return time.getTime() < _now || time.getTime() > sevenDays // 限制日期间隔最大7天且需大于当天
      }
    },