当前时间new Date()转换成时间戳毫秒数

          <el-col :span="12">
                    <el-form-item label="日期" prop="estimatedDate">
                      <el-date-picker
                        v-model="form.estimatedDate"
                        value-format="YYYY-MM-DD"
                        type="daterange"
                        start-placeholder="开始日期"
                        end-placeholder="结束日期"
                        @change="changeDate"
                      ></el-date-picker>
                    </el-form-item>
                  </el-col>
                  
                  // 时间变化，重新获取用户列表
                function changeDate(date) {
                  if (!date) return;
                  form.value.scheduleStartDate = date[0];
                  form.value.scheduleEndDate = date[1];
                  let days = getDistanceDays(date[0], date[1]);
                  form.value.tGsyfScheduleDate = [];
                  for (let i = 0; i < days; i++) {
                    let time = new Date(date[0]).getTime() + 1000 * 60 * 60 * 24 * i;
                    let newdate = new Date(time);
                    let year = newdate.getFullYear();
                    let month =
                      newdate.getMonth() + 1 < 10
                        ? "0" + (newdate.getMonth() + 1)
                        : newdate.getMonth() + 1;
                    let day =
                      newdate.getDate() < 10 ? "0" + newdate.getDate() :     newdate.getDate();
                    newdate = year + "-" + month + "-" + day;
                    // let newdate = afterDate(date[0], i);
                    form.value.tGsyfScheduleDate.push({
                      startDate: newdate,
                    });
                  }