How can I extend a 3-digit color code to a 6-digit color code in JavaScript?
Learn how to convert a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
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 · Can I create dynamic setters and getters in JavaScript?
Using the Proxy object, we can create dynamic getters and setters for objects in JavaScript.
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JavaScript · Assign default values for a JavaScript object's properties
Assign default values for all properties in an object that are
undefined. -
JavaScript · Count the occurrences of a value in a JavaScript array or string
Given a value, find out how many times it appears in an array or string.
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JavaScript · Common regular expressions
A collection of regular expressions that can be used to solve common problems.
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JavaScript · How can I check for a blank value in JavaScript?
JavaScript doesn't have a built-in way to check if a value is blank, but it's easy to create one.
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JavaScript · What is the difference between Array.prototype.map() and Array.prototype.forEach()?
Which method do you reach for first? What are the differences between them? Let's find out!
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JavaScript · Create a unit converter data structure in JavaScript
Learn how to create a unit converter data structure in JavaScript that can convert between any compatible units.
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JavaScript · The case for trailing commas in JavaScript
Trailing commas are not without controversy. Here's why I think you should use them.
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JavaScript · Create an array of partial sums in JavaScript
Create an array of partial sums, using
Array.prototype.reduce()andArray.prototype.slice(). -
JavaScript · Merge sort
Sort an array of numbers, using the merge sort algorithm.
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JavaScript · Serialize specific properties from a JSON object
Have you ever wanted to serialize an object but only include certain keys? Turns out JavaScript provides an easy way to do this!
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JavaScript · Join a JavaScript array into a string, with locale-sensitive separators
Learn how to leverage
Intl.ListFormatto join an array into a string, with appropriate separators. -
JavaScript · Check if a number is prime in JavaScript
Learn how to check if a number is prime and how to generate prime numbers up to a given number in JavaScript.
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JavaScript · How can I initialize 2D array in JavaScript?
Learn how to initialize a 2D array in JavaScript in a handful of different ways.
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JavaScript · Group array elements based on a function
Group the elements of an array based on the given function, producing an object with the grouped values.
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JavaScript · Get, set or add styles to an HTML element with JavaScript
Learn how to retrieve and manipulate the styles of an HTML element easily and efficiently with JavaScript.
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JavaScript · How can I listen for an event only once in JavaScript?
Learn how to add an event listener that is executed at most once.
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JavaScript · Calculate the Euclidean distance in JavaScript
Use JavaScript's
Math.hypot()to calculate the Euclidean distance between two points. -
JavaScript · Debounce a JavaScript function and return a promise
Easily create a debounced function that returns a promise.
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JavaScript · Set operations in JavaScript
Explore how you can apply mathematical set operations to JavaScript
Setobjects and arrays. -
JavaScript · Check if a numeric array is sorted in JavaScript
Efficiently check if a numeric array is sorted in ascending or descending order in JavaScript.
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JavaScript · JavaScript array filtering tips
A few tips and tricks to help you filter arrays in JavaScript more efficiently.
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JavaScript · Word wrap a JavaScrip string
Wrap a string to a given number of characters using a string break character in JavaScript.