function
nextDate(date = new Date()) {
date = new Date(date);
date =
+date + 1000 * 60 * 60 * 24;
date = new Date(date);
return date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate();
}
+date 返回日期的毫秒数，相当于 date.getTime()