Formatting numeric values in JavaScript
Learn common number formatting operations, such as rounding, padding, optional decimal marks, currency, seconds, bytes, and more.
JavaScript Date Snippets
The JavaScript snippet collection contains a wide variety of ES6 helper functions. It includes helpers for dealing with primitives, arrays and objects, as well as algorithms, DOM manipulation functions and Node.js utilities.
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JavaScript · Check if a JavaScript date is inside business hours
Leverage the
Dateobject to check if a given date is inside business hours. -
JavaScript · How to calculate date difference in JavaScript
Learn how to calculate date difference in seconds, minutes, hours, days etc. in vanilla JavaScript.
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JavaScript · How can I implement a sleep function in JavaScript?
Learn how you can implement a delay function using
setTimeout(), promises andasync/await. -
JavaScript · How can I add minutes, hours or days to a JavaScript date?
Learn how to manipulate
Dateobjects to add minutes, hours, days and more. -
JavaScript · Check if a value is a valid JavaScript date
Learn how you can check if a valid date object can be created from the given values.
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JavaScript · Weekday name from a JavaScript Date object
Get the name of the weekday from a JavaScript
Dateobject. -
JavaScript · Find the day, week, month, or quarter of the year using JavaScript
Determine the day, week, month, or quarter of the year that a date corresponds to, using vanilla JavaScript.
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JavaScript · Date range generator in JavaScript
Create a generator that generates all dates in a given range.
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JavaScript · Format a date to ISO string with timezone using JavaScript
Convert a date to extended ISO format (ISO 8601), including timezone offset.
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JavaScript · Find the minimum or maximum date using JavaScript
Quickly find the minimum or maximum date in an array of dates.
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JavaScript · Get colon time from a JavaScript date
Get the time part of a Date object in the format HH:MM:SS.
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JavaScript · How do I compare two dates in JavaScript?
Learn how you can compare two dates in JavaScript, determining which one comes before or after the other.
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JavaScript · Find the number of days in a month using JavaScript
Calculate the number of days in a month for a given year using JavaScript.
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JavaScript · Date of yesterday, today or tomorrow in JavaScript
Easily calculate the date of yesterday, today or tomorrow in JavaScript.
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JavaScript · Determine if a JavaScript date is a weekday or weekend
Quickly and easily determine if a given JavaScript
Dateobject is a weekday or weekend. -
JavaScript · How can I find the date of n days ago from today using JavaScript?
Calculate the date of
ndays ago from today or the date ofndays from now. -
JavaScript · Get the first or last date of a month using JavaScript
Use the
Dateobject and some clever tricks to get the first or last date of a month in JavaScript. -
JavaScript · Check if a year is a leap year in JavaScript
Having a hard time wrapping your head around the math involved in checking for leap years? You might not need to!
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JavaScript · Convert between a JavaScript Date object and a Unix timestamp
Easily convert between a JavaScript Date object and a Unix timestamp.