Javascript - Script

A Javascript script is script file with a js extension.

A browser script is a run that is run by the browser where Javascript is:

• in a page via the script element: Browser - Javascript
• in a browser extension created by user: Browser - Userscript (user.js)

In browser, the following javascript features are implemented:

• the ECMAScript Standard (basic feature)
• and the Web API (browser API)

A node script runs in Node (ie on the server or on a laptop)

In Node, the following javascript features are implemented:

• the ECMAScript Standard (basic feature)
• and the Node Api (File System, …)

Or in any other engine