How do I empty an array in JavaScript?
You can use a lot of different techniques to empty an array in JavaScript. See which ones best suits your needs with this quick guide.
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 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 · Create an HTML element with JavaScript
If you want to create an element from a string without appending it to the document, you can use a few lines of JavaScript.
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JavaScript · What is CORS?
CORS (Cross-Origin Resource Sharing) trips up many developers, but it's pretty easy to wrap your head around.
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JavaScript · Colorize text in the Node.js terminal
Use special Unicode characters to print text in color in the console.
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JavaScript · What are the differences between var, let and const in JavaScript?
JavaScript variables can be declared a handful of ways. However, understanding their differences can drastically change the way you code.
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JavaScript · Transpose a matrix in JavaScript
Learn how to transpose a two-dimensional array in JavaScript.
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JavaScript · Convert a string to a URL-friendly slug using JavaScript
Learn how to easily convert any string to a URL-friendly slug, using regular expressions.
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JavaScript · Select the focused DOM element with JavaScript
Here's a quick and easy way to select the currently focused DOM element in JavaScript.
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JavaScript · How do I remove a property from a JavaScript object?
Ever wanted to delete a property from a JavaScript object? Here are a few way you can accomplish that.
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JavaScript · Remove elements from a JavaScript array without mutating it
Did you know that implementing a non-mutating version of
Array.prototype.splice()is only a few lines of code? -
JavaScript · Remove an element from the DOM using JavaScript
Learn how to quickly remove an element from the DOM using JavaScript.
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JavaScript · JavaScript modules Cheat Sheet
Learn everything you need to know about JavaScript modules with this handy cheatsheet.
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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 · Expand tabs into spaces
Convert tabs to spaces, allowing you to control the number of spaces each tab corresponds to.
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JavaScript · Check if an element is visible in the viewport using JavaScript
Learn how to check if an element is visible in the browser's viewport, using this simple technique.
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JavaScript · How can I get the current URL in JavaScript?
Learn a simple way to get the browser's current URL in JavaScript.
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JavaScript · 3 ways to use the JavaScript spread operator with arrays
JavaScript’s spread operator is a very versatile tool. Here are some simple ways to use it.
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JavaScript · Create a JavaScript promise that resolves after a given amount of time
Learn how to create a promise that resolves after a given amount of time in JavaScript.
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JavaScript · What is recursion and when is it useful?
Recursion is a very important programming concept all developers should be familiar with.
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JavaScript · The order of then and catch matters
Messing up the order of chained
thenandcatchmethods in JavaScript promises can cause problems. Here's a short primer on the subject. -
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 · Get the first or last n elements in a JavaScript array
Learn how to retrieve the first or last
nelements in a JavaScript array with a single line of code. -
JavaScript · Create a directory if it doesn't exist using Node.js
Learn how to create a directory using Node.js, if it doesn't exist.