Oct 2, 2025 · JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions. While it is most well-known as the scripting language for …

Answers some fundamental questions such as "what is JavaScript?", "what does it look like?", and "what can it do?", along with discussing key JavaScript features such as variables, strings, …

MDN Web Docs is an open-source, collaborative project that documents web platform technologies, including CSS, HTML, JavaScript, and Web APIs. We also provide extensive 🧑‍🎓 …

JavaScript is a high-level, often just-in-time–compiled language that conforms to the ECMAScript standard. [12] It has dynamic typing, prototype-based object-orientation, and first-class …

Nov 7, 2025 · The JavaScript Guide shows you how to use JavaScript and gives an overview of the language. If you need exhaustive information about a language feature, have a look at the …

Jul 22, 2017 · You can learn all that in detail later on, in our JavaScript learning area, and in the rest of MDN. Below we will introduce you some aspects of the core language, and you'll also …

Jul 19, 2025 · This chapter introduces JavaScript and discusses some of its fundamental concepts.

Jul 29, 2025 · The JavaScript reference serves as a repository of facts about the JavaScript language. The entire language is described here in detail. As you write JavaScript code, you'll …

Sep 18, 2025 · The this keyword in JavaScript refers to the context where a piece of code is supposed to run, typically used in object methods.

Oct 2, 2025 · Welcome to the MDN beginner's JavaScript course! In this first article we will look at JavaScript from a high level, answering questions such as "what is it?", and "what is it doing?", …