What is it?
JavaScript is a high-level, interpreted or just-in-time compiled, dynamic general programming language mainly used to build websites. It’s the only language other than Web Assembly to run natively on all browsers.
It can natively be called from a HTML file or declared inside of it, to create dynamic web pages.
It’s also possible to build server-side applications with Node.js, mobile apps and sites with the React framework and cross-platform hybrid desktop applications with Electron.
Some topics: