Dates are a crucial component of any programming language, but they may be particularly important in JavaScript. The Date object is a JavaScript built-in object that holds the current date and time. It contains many built-in methods (such as getDate and getFullYear) that make working with dates straightforward.
Despite the built-in capability, even seasoned JavaScript developers may face a variety of obstacles. Therefore, it is essential to understand how to write dates in JavaScript. This article will discuss the fundamentals of dealing with dates in JavaScript. We’ll begin with a brief overview of the Date object.
The Date Object
As previously stated, the Date object is a built-in JavaScript object that records the date and time. The Date object provides several ways for manipulating dates. The Date object includes many attributes that may be used to get date-related information. Below mentioned are some of its uses:
Parsing Dates
Date parsing is one of the most used date-related jobs. Dates are parsed by converting date strings to Date objects. This is often required when dealing with data from other sources (such as an API). JavaScript provides many date parsing methods. The Date.parse method is the most popular technique. This function accepts a string representing a date as its argument and returns the milliseconds elapsed since midnight.
var time = Date.parse(“25-May-2022”); If the date string is in an unparsable format, Date.parse will return NaN.
var time = Date.parse(“Invalid Date”); / This function returns NaN
You may use a regular expression if you need to parse a date string that Date.parse cannot handle.
The equation below may be used to parse the majority of date formats.
var regex = /(\d{4})-(\d{2})-(\d{2})/; \s
var match = regex.exec(“2022-05-25”);
var year = match[1]; / 2022
month = match[2]; / May
var day = match[3]; / 25
A second solution is to use a library such as moment.js. Moment.js is a popular JavaScript package that simplifies date manipulation.
var time = moment.js (“May 25, 2022”).
Arrangement of Dates
To format dates, a Date object must be converted to a string. This is often required for showing dates to end users. JavaScript supports a variety of date formatting options. toDateString is the most common approach. This function returns the date in a format that can be read by humans (such as “Thu May 25 2022”).
var date = new Date();
var str = date.
toDateString(); /”Thu, 25 May 2022″
If you want additional control over the date format, you may use the moment library.
js. var date = moment(“May 25, 2022”);
var str = date.format(“MMMM DD, YYYY”); / “May 25, 2022”
Compiling Dates
Calculating dates involves applying mathematical operations to dates. This is often required when dealing with data including a date component. JavaScript provides many date calculation methods. Using the Date.prototype.set* methods is the most popular approach.
These techniques provide the setting of a date’s year, month, day, hour, minute, and second.
var date = new Date();
date.setFullYear(2022);
date.setMonth(4);
date.setDate(25);
Using the Date.prototype.get* methods are also a popular practice. These techniques enable you to get a date’s year, month, day, hour, minute, and second.
var date = new Date();
var year = date.
getFullYear(); / 2022
var day = date.getDate(); / 25
The Date.prototype.getTime function may also be used to get the time in milliseconds since January 1, 1970 at midnight.
var date = new Date();
var time = date.getTime(); / 1495673600000
If you need to execute more complicated date calculations, you may use the moment library.
var date1 = moment(“2022-05-25”);
var date2 = moment(“2022-06-01”);
var diff = date2.diff (date1, “days”); / 7
Conclusion
This article discusses the fundamentals of dealing with dates in JavaScript. We have examined the Date object and some of the most commonly used date-related operations, including parsing, formatting, and computing dates.
Despite the built-in capability, JavaScript dates may be confusing. Therefore, it is essential to understand how to operate with dates. By knowing the fundamentals of dealing with dates, you can avoid frequent errors and develop code that is more resilient and simpler to maintain. Once you become acquainted with these function, you can easily master writing dates in Javascript
