.JS File Extension
Full form: JavaScript
What is a .js file?
A programming language that makes web pages interactive, from menus to games. Files that end with .js belong to the web family of file types, so your computer links them with a suitable program automatically.
Where is .js used?
Interactive websites, web apps and server programs with Node.js. Because the format is so common, almost every modern device and software understands it.
Examples of .js file names
script.js
How to open a .js file
You can open it with: Browsers, VS Code, Node.js. If it does not open, check that the file is not damaged and that you have downloaded it fully; also confirm that the extension was not renamed by mistake.
Quick tips
Never rename a file just to change its extension, because that does not convert the data inside. Use a proper converter or the Save As / Export option. Keep a backup copy of important web files before editing them.