Next, we’ve calculated the number of milliseconds in an hour. Next, we’ve used the getTime() function to get the number of milliseconds from the currentDateObj object. NewDateObj: Sat 01:19:27 GMT-0300 (Atlantic Daylight Time)įirstly, we’ve initialized the currentDateObj variable with the current date, and it’s a Date object. Var newDateObj = new Date(numberOfMlSeconds + addMlSeconds) Var numberOfMlSeconds = currentDateObj.getTime() ![]() In the following example, we’ll add one hour to the existing Date object. Let’s try to understand how you can use the getTime() function to add time to a Date object in JavaScript. That's just a computer time convention that counts the number of seconds (milliseconds in JavaScript) since midnight UTC on January 1st, 1970. In JavaScript, the getTime() function returns the number of milliseconds since the Unix epoch time. In this section, we’ll discuss how you can add time to a JavaScript Date object in vanilla JavaScript. How to Add Time to a JavaScript Date With Vanilla JavaScript Today, we’re going to discuss both ways of performing date manipulations in JavaScript. Alternately, you can use a date and time library like moment.js. Often, you'll just end up implementing a custom solution which works for you. In fact, if you want to perform operations on a Date object like adding time to or subtracting time from a date, there’s no easy way in vanilla JavaScript. In most cases, you can just use these methods to format the date and time for output. Although these methods are really useful for retrieving different elements of the date and time, a Date object doesn’t provide any methods that you can use to manipulate the date itself. Luckily, JavaScript provides a built-in Date object which provides a lot of utility methods for date and time management. Often, you'll need to work with dates and times in JavaScript. ![]() Specifically, we’ll see how you can add time to a Date object and subtract time from a Date object in JavaScript. In this article, we’ll discuss how you can do date manipulations with a JavaScript Date object.
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