Including obtaining the current date, obtaining the specified date, calculating the date difference, calculating the month difference between two dates, and obtaining the number of days in the current month
1. Get the current date
Receive the parameter format
@return to specify the format date
currentDate(format = 'yyyy-mm-dd') {
const date = new Date()
const year = date.getFullYear()
const month = numberComplement(date.getMonth() + 1)
const day = numberComplement(date.getDate())
if (format === 'yyyy-mm-dd') {
return `${
year}-${
month}-${
day}`
}
if (format === 'yyyy/mm/dd') {
return `${
year}/${
month}/${
day}`
}
return `${
year}年${
month}月${
day}日`
}
2. Get the specified date
Receive parameters targetDate, day
targetDate: target start date
day: date a few days after the target
, such as targetDate=2023-03-07, day=7
@return 2023-03-14
getAppointDate(targetDate, day) {
let result = new Date(new Date(targetDate).getTime() + 24 * 60 * 60 * 1000 * day);
return `${
result.getFullYear()}-${
numberComplement(result.getMonth() + 1)}-${
numberComplement(result.getDate())}`;
}
3. Calculate the date difference
Calculate how many days are between two dates
Receive parameters startDate, endDate
@return days (difference in days)
getDaysDifference(startDate, endDate) {
const sDate = Date.parse(startDate);
const eDate = Date.parse(endDate);
const days = (sDate - eDate) / (24 * 60 * 60 * 1000);
return days;
}
4. Calculate the month difference between two dates
Receive parameters startDate, endDate
diffMonths(startDate, endDate) {
let startYear = startDate.split("-")[0]
let endYear = endDate.split("-")[0]
let startM = startDate.split("-")[1]
let endM = endDate.split("-")[1]
let startMonth = startYear + startM
let endMonth = endYear + endM
if (startMonth > endMonth) {
let diffYear = startYear - endYear
let diffMonth = startM - endM
return diffYear * 12 + diffMonth
} else if (startMonth < endMonth) {
let diffYear = endYear - startYear
let diffMonth = endM - startM
return diffYear * 12 + diffMonth
} else {
return 0
}
}
5. Get the number of days in the current month
@return days
getDays() {
const date = new Date()
return new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
}
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