How to calculate date difference in JavaScript
Learn how to calculate date difference in seconds, minutes, hours, days etc. in vanilla JavaScript.
Code Articles
30 seconds of code contains a curated collection of code articles covering a wide range of development needs. The collection spans many topics, ranging from simple coding problems to theoretical concepts and development techniques.
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JavaScript · -
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 · 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 · 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 · Get all unique values in a JavaScript array & remove duplicates
Easily remove duplicates from a JavaScript array using the built-in
Setobject, and learn a few other tricks along the way. -
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 · 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 · How can I clone an object in JavaScript?
Learn how JavaScript handles mutable data, such as objects and arrays, and understand how shallow cloning and deep cloning work.
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HTML · A user-friendly setup for number-only inputs with plain HTML
Number-only inputs aren't as straightforward as you might expect. Here's a user-friendly way to set them up.
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JavaScript · Flatten or unflatten a JavaScript object
Learn how to manipulate JavaScript objects by flattening or unflattening them.
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JavaScript · How can I specify the base for a logarithm in JavaScript?
Calculate the logarithm of a number or check if a number is a power of a specific base.
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JavaScript · Compact an array or object in JavaScript
Learn how to compact an array or object in JavaScript using the
Booleanfunction and recursion. -
JavaScript · How can I find the insertion index of an element in a sorted JavaScript array?
Given a sorted array, find the correct index to insert a given value.
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JavaScript · Set operations in JavaScript
Explore how you can apply mathematical set operations to JavaScript
Setobjects and arrays. -
JavaScript · How can I check if an array is a superset of another array in JavaScript?
Check if an iterable is a superset of another one, excluding duplicate values.
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JavaScript · Case conversion in JavaScript
A complete guide to case conversion in JavaScript, including camel case, kebab case, snake case, Pascal case, title case and sentence case.
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JavaScript · How can I truncate a string to a specified length using JavaScript?
String splitting and truncation, both simple and locale-sensitive are possible in JavaScript. Learn how in this guide.
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JavaScript · How can I check if a string starts or ends with a substring of another string using JavaScript?
Test if a string's start or end partially matches another string.
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JavaScript · Min and max value of a JavaScript array
When working with JavaScript arrays, you might need the minimum or maximum value. Here are a few quick and easy ways to do it.
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JavaScript · An introduction to functional programming
A short introduction to the functional programming paradigm.
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JavaScript · JavaScript function arity
Function arity is a simple, yet useful concept in functional programming, especially when combined with currying.
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JavaScript · Understanding JavaScript currying
Currying is a process that transforms a function that takes multiple arguments into a series of functions that each take a single argument.