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@Singhak
Created Aug 17, 2020
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let startDate = new Date("2010-05-28");
let endDate = new Date("2020-03-01");
function isDateValid(dateToCheck) {
return isNaN(Date.parse(dateToCheck)) ? false : true;
}
function getMilliSecDiff(startDate, endDate) {
let startMilliSec = startDate.getTime();
let endMilliSec = endDate.getTime();
return endMilliSec - startMilliSec;
}
function getSecondDiff(startDate, endDate) {
let milisecsDiff = getMilliSecDiff(startDate, endDate);
// 1 sec = 1000ms
return milisecsDiff / 1000;
}
function getMinuteDiff(startDate, endDate) {
let secondDiff = getSecondDiff(startDate, endDate);
// 1 min = 60sec
return ~~(secondDiff / 60);
}
function getHourDiff(startDate, endDate) {
let hourDiff = getMinuteDiff(startDate, endDate);
// 1 hour = 60mins
return ~~(hourDiff / 60);
}
function getDayDiff(startDate, endDate) {
let dayDiff = getHourDiff(startDate, endDate);
// 1 Day = 24hour
return ~~(dayDiff / 24);
}
function getWeekDiff(startDate, endDate) {
let weekDiff = getDayDiff(startDate, endDate);
// 1 Day = 24hour
return ~~(weekDiff / 7);
}
console.log(getMilliSecDiff(startDate, endDate));
console.log(getSecondDiff(startDate, endDate));
console.log(getMinuteDiff(startDate, endDate));
console.log(getHourDiff(startDate, endDate));
console.log(getWeekDiff(startDate, endDate));
console.log(getDayDiff(startDate, endDate));
// function getYearDiff(fromDate, toDate) {}
function getMonthDiff_v1(startDate, endDate) {
if (!isDateValid(startDate) && !isDateValid(endDate))
return "Date(s) is/are not valid";
if (endDate < startDate) {
return "End Date Date is less than To Start Date";
}
let monthsFromYearDiff =
(endDate.getFullYear() - startDate.getFullYear()) * 12;
let monthsFromMonthDiff = endDate.getMonth() - startDate.getMonth();
let dayDiff = endDate.getDate() - startDate.getDate();
if (dayDiff < 0) {
// means fromDate is not a complete month
return monthsFromYearDiff + monthsFromMonthDiff - 1;
}
return monthsFromYearDiff + monthsFromMonthDiff;
}
console.log(getMonthDiff_v1(startDate, endDate));
function getMonthDiff_v2(startDate, endDate) {
var diff = (endDate.getTime() - startDate.getTime()) / 1000;
diff /= (60 * 60 * 24 * 365) / 12;
return Math.abs(Math.round(diff));
}
console.log(getMonthDiff_v2(startDate, endDate));
function getMonthDiff_v3(startDate, endDate) {
let diff = (endDate.getTime() - startDate.getTime()) / 1000;
// 1 month = 4 week
// 1 week = 7 days
// 1 day= (60 * 60 * 24) hours
diff /= 60 * 60 * 24 * 7 * 4;
return Math.abs(Math.floor(diff));
}
console.log(getMonthDiff_v3(startDate, endDate));
function getMonthDayDiff(startDate, endDate) {
if (!isDateValid(startDate) && !isDateValid(endDate))
return "Date(s) is/are not valid";
if (endDate < startDate) {
return "End Date Date is less than To Start Date";
}
let monthsFromYearDiff =
(endDate.getFullYear() - startDate.getFullYear()) * 12;
let monthsFromMonthDiff = endDate.getMonth() - startDate.getMonth();
let dayDiff = endDate.getDate() - startDate.getDate();
if (dayDiff < 0) {
// means fromDate is not a complete month
var dtmp = new Date(startDate.getFullYear(), startDate.getMonth() + 1, 0);
var numDays = dtmp.getDate();
dayDiff += numDays;
let month = monthsFromYearDiff + monthsFromMonthDiff - 1;
return { month, dayDiff };
}
let month = monthsFromYearDiff + monthsFromMonthDiff;
return { month, dayDiff };
}
console.log(getMonthDayDiff(startDate, endDate));
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