Get colon time from a JavaScript date
Get the time part of a Date object in the format HH:MM:SS.
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 · How can I iterate over nested iterables in JavaScript?
Ever wanted to iterate over nested iterables in JavaScript? Here's how.
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JavaScript · Generate the Fibonacci sequence in JavaScript
Generate an array, containing the Fibonacci sequence, up until the nth term, using two different approaches.
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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 · How can I convert a Map to a JavaScript object and vice versa?
Learn how to convert between
Maps and objects in JavaScript. -
JavaScript · Compare strings regardless of case and accent
Here's a quick tip on how to compare and sort arrays of strings, ignoring case and accents.
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JavaScript · JavaScript array sorting shorthand
Learn how to quickly write code to sort JavaScript arrays with this handy one-liner.
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JavaScript · Calculate the angle between two vectors in JavaScript
Learn how to calculate the angle (theta) between two vectors in JavaScript.
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JavaScript · What is the difference between synchronous and asynchronous code in JavaScript?
Understanding the differences between synchronous and asynchronous code is a crucial piece of knowledge for every web developer.
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JavaScript · Regular Expressions Cheat Sheet
Regular expressions are a very useful tool. Save this cheatsheet for when you need to look up their syntax and speed up your development.
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JavaScript · Using random values with pure functions
Randomness and pure functions don't seem to go hand in hand. But where there's a will, there's a way.
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JavaScript · Generate a random hex color code in JavaScript
Learn how to generate a random hexadecimal color code with a few lines of JavaScript.
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JavaScript · JavaScript property enumerability
Property enumerability dictates how JavaScript object properties behave in different scenarios.
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JavaScript · Make a JavaScript function return a promise
Learn how to convert an asynchronous function to return a promise in JavaScript.
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JavaScript · JavaScript naming conventions
Naming conventions make code easier to read and understand. Learn how to name your variables in JavaScript with this handy guide.
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JavaScript · Midpoint of two points
Calculate the midpoint between two pairs of points in a 2D plane, and beyond.
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JavaScript · Check if the current JavaScript environment is Node.js or a browser
Determine if the current JavaScript environment is Node.js or a browser.
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JavaScript · Check if a URL is an absolute URL with JavaScript
Want to know if a string is an absolute URL? This snippet will help you out.
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JavaScript · What is the difference between encodeURI() and encodeURIComponent() in JavaScript?
JavaScript provides two methods for encoding characters to URL-safe strings. Do you know when to use each one?
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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 · Replace all occurrences of a string in JavaScript
If you need to replace all occurrences of a string in JavaScript, you have a couple of options.
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JavaScript · What is the difference between then and finally in a JavaScript promise?
A JavaScript promise's
thenandfinallymethods seem very similar. But there are a few important differences you need to keep in mind. -
JavaScript · Improve JavaScript scroll listener performance
Scroll listeners can easily become a performance bottleneck for your web application. Here's how to fix that.
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JavaScript · Check if a JavaScript object has a given value or key
When working with objects, you'll often need to check if a value or key exists, and these snippets will show you how to do just that.