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JavaScript Guide

JavaScript (JS) is a lightweight interpreted or JIT (Just In Time)-compiled programming language with first-class functions. It is primarily used to add functionality to a webpage. Anything from modifying the page itself, to fetching content, logging in users, or holding a video call.

While it is most well-known as the scripting language for web pages, many non-browser environments also use it, such as node.js, Apache CouchDB and Adobe Acrobat.

Many people use JavaScript frameworks to simplify certain task or solve common problems. Some examples would be React, Angular, or Vue. Each framework is designed for a specific purpose, and is usually not necessary for a basic website.

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