JavaScript

What are Typed Arrays? Typed Arrays are a way to handle binary data in JavaScript. They are array-like objects that provide a mechanism for reading and writing raw binary data in memory buffers. Unlike normal arrays, Typed Arrays......

This practical, example-based article will walk you through a couple of different ways to turn a Map into an object in modern JavaScript (ES6 and newer). I assume you already have some knowledge about the programming language, so I......

This succinct and straightforward article will show you how to add/remove key-value pairs to/from a Map in modern JavaScript. Without any further ado, let’s get to the point. Adding key-value pairs to a Map You can add a......

Converting a Map to a JSON string In modern JavaScript (ES6 and beyond), the most elegant and efficient way to convert a Map to JSON is to use the Object.fromEntries() method to convert the Map to an object and then use the......

This practical, example-based article will walk you through a couple of different ways to convert an object into a map in modern JavaScript (ES6 and beyond). I assume you already have some knowledge about the programming language, so I......

What is a WeakSet In modern JavaScript (ES6 and beyond), a WeakSet is a collection of garbage-collectible values, including objects and non-registered symbols. Garbage-collectible values are values that can be deleted by the......

Overview What is a WeakMap? A WeakMap is a collection of key/value pairs whose keys must be objects, with values of any arbitrary JavaScript type, and which does not create strong references to its keys. That means an object’s......

What are Sets? Sets are a type of object in JavaScript that let you store unique values of any type, whether primitive values or object references. You can think of them as a collection of items that have no duplicates. For example,......

let, const, and var are all keywords for declaring variables in JavaScript, but they have different scoping, hoisting, and reassignment behaviors. In general, with ES6 and beyond, it is recommended to use let or const instead of var......

Overview What is a query string? In the world of JavaScript and web development, a query string is a set of characters tacked onto the end of a URL. The query string begins after the question mark (?) and can include one or more......

Overview In this article, we will create a sample webpage whose background color is randomly changed when a button gets clicked or when the page is refreshed. We will get the job done by only using JavaScript, HTML, and......

In most websites and apps, there is an “I agree to terms and conditions” checkbox (the phrase in the quotes may differ slightly) at the registration screen. This is a method of protecting their business by requiring that......