Category: JavaScript

Not sure how to get today’s date and time in JavaScript? This guide will walk you through the process step by step and with code samples.

No, you’re not trying to solve the unsolvable. Here’s how to handle unexpected identifier errors in your JavaScript code.

Calculating a string’s length in JavaScript, for beginners. Everything you need to know (and nothing you don’t).

The best way to calculate tax with JavaScript (and the pitfalls to watch out for as you do).

Are you stuck? Don’t worry, we’ve got you. We’ll show you how to iterate over a map object in JavaScript like a pro.

You might not know this, but JavaScript isn’t a class-based programming language as other languages are. So let’s talk about your options.

Does your string contain ___? There’s a simple way to check. Here’s how to search strings for substrings like a pro.

Not quite sure how to check if a variable is (or isn’t) null in JavaScript? Don’t worry, we got you. This guide will show you the ropes.

This tutorial will show you how to convert a Map object’s keys, values, or key/value pairs to an Array object in JavaScript.

What’s the difference between declaring a constant or variable and assigning it a value? Here’s everything you need to know.

How to get all or one of the parameters from the URL of the current page in JavaScript with vanilla JavaScript.

This tutorial will show you how to get the current page path in JavaScript (and more).

This tutorial will show you how to get the current domain name in JavaScript (and more).

The two ways to declare a global variable in JavaScript, inside and outside of a function.

Remove special characters from any string with the String.replace() method and well-written RegEx. We show you how!

A web developer’s introduction to the data layer, a must-have for advertising and marketing on websites and web applications.

Here’s how to add an event listener for multiple DOM elements in JavaScript.

Learn how to get the href attribute of any, or specific, clicked links in JavaScript.

Learn how to get the class of any, or specific, DOM element that the user clicks by creating an event listener.

Learn how to get the id of any, or specific, DOM element that the user clicks by creating an event listener.

How to convert an array into a string without commas with the Array.join() method in JavaScript.

Want to run JavaScript code on your Mac? Here’s how to do it in the Terminal and from your browser.

So you need to implement validation for your app’s frontend or backend. Here’s how to do it with RegEx.

So you need to remove commas from a string in JavaScript? These are the two best ways to achieve this.

The best ways to create and use arrays of images in JavaScript.

This is the best way to listen to click events for a button element.

Wondering whether to inline your JavaScript code or load it externally from a file? We help you decide.

We round up the most common causes for your JavaScript code not working.

Want to log out your user after they’ve closed the tab or window? Here’s how you could do this in JavaScript.

The best ways to set an empty attribute to one or multiple DOM elements in your HTML markup, with plain JavaScript.

We look at the simplest, most straightforward way to remove quotes from a string in JavaScript.

You asked for it, we delivered. We explain nested arrays in a way that anyone, from beginner to expert, can understand.

Here’s how to declare an empty array object in JavaScript—and what you need to do so that it meets your needs.

ReferenceErrors are annoying. These common mistakes and clues to look for will help you get to the meat of it.

The simplest, most straightforward ways to create an array of letters in the English alphabet in JavaScript.

The quick and easy way to find the largest number in an array in JavaScript.

There’s a way to nest string in two or more quotes in JavaScript, and you will love the simplicity of it.

Still learning? These are the best ways to add a new line to your JavaScript code’s output.

In JavaScript, it’s easier to repeat a string an n number of times than you probably think. Here’s how to do it.

So you’re looking for a good way to check if a DOM element has a CSS class in JavaScript?

Find out the two best ways to check whether a string is empty or not in JavaScript.