How to calculate date difference in JavaScript
Learn how to calculate date difference in seconds, minutes, hours, days etc. in vanilla JavaScript.
JavaScript 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 · Implement the Caesar cipher in JavaScript
The Caesar cipher is a simple substitution cipher, which can be easily implemented with a few lines of JavaScript code.
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JavaScript · Bucket sort
Sort an array of numbers, using the bucket sort algorithm.
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JavaScript · Asynchronous JavaScript Cheat Sheet
Learn everything you need to know about promises and asynchronous JavaScript with this handy cheatsheet.
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JavaScript · Introduction to arrow functions in JavaScript
JavaScript arrow functions are a very useful tool to learn and master. Here's a complete introduction to everything you need to know.
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JavaScript · Sampling, shuffling and weighted selection in JavaScript arrays
Learn how to shuffle, sample and perform weighted selection on JavaScript arrays.
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JavaScript · Programmatically trigger event on HTML element using JavaScript
Learn how to trigger an event on an HTML element using JavaScript.
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JavaScript · Remove attributes from an HTML element with JavaScript
A simple trick to remove one or more attributes from an HTML element.
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JavaScript · How can I detect if Caps Lock is on with JavaScript?
If you need to check if Caps Lock is on when the user is typing in the browser, JavaScript's got you covered.
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JavaScript · A cautionary tale about JavaScript callbacks
JavaScript callbacks are especially tricky when you're not careful. Take a deeper dive into potential issues and how to avoid them.
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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 · Toggle element in a JavaScript array
Remove an element from an array if it's included in the array, or push it to the array if it isn't.
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JavaScript · Convert an RGB color string to a JavaScript array or object
Easily convert an
rgb()color string to an array of values or an object with the values of each color. -
JavaScript · An Introduction to JavaScript Proxy
A quick introduction to the JavaScript Proxy object and where it can be used.
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JavaScript · Nest linked JavaScript objects
Learn how to recursively nest objects linked to one another in a flat array.
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JavaScript · Make any JavaScript value iterable
Did you know you can define an iterator for any JavaScript value? This quick tip will show you how.
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JavaScript · Map a JavaScript object to an array
Map an object to an object array, using the provided mapping function.
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JavaScript · What is the difference between JavaScript's for...in, for...of and forEach?
Learn the differences between the three most commonly used iteration methods in JavaScript, that often confuse beginners and veterans alike.
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JavaScript · Compact an array or object in JavaScript
Learn how to compact an array or object in JavaScript using the
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JavaScript · Combine 2 JavaScript object arrays based on a key
Learn how to merge two arrays of objects, while combining objects based on a specified key.
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JavaScript · Big-O Cheat Sheet
Learn everything you need to know about Big-O notation with this handy cheatsheet.
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JavaScript · Uppercase or lowercase object keys in JavaScript
Convert all the keys of an object to upper or lower case.
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JavaScript · Replace the last occurrence of a pattern in a JavaScript string
Learn how to use regular expressions to replace the last occurrence of a pattern in a JavaScript string.
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JavaScript · Convert an integer to a roman numeral in JavaScript
Roman numerals are often used for stylistic reasons, but converting an integer to a roman numeral can be a bit tricky.