.MJS File Extension

.MJS File Extension

File Type

Node.js ES Module File

Developer N/A
Popularity
4.3  |  9 Votes
Category Web Files
Format Text

What is an MJS file?

An MJS file is a source code file containing an ES Module (ECMAScript Module) for use with a Node.js application. MJS files are written in JavaScript, and may also use the .JS extension outside of the Node.js context. ES Modules allow web and application developers to organize code into smaller reusable components.

More Information

ECMAScript 6 (ES6) introduced the specification for ES Modules, providing a standard for implementing modules in JavaScript. As of 2018, all major web browsers support ES Modules.

However, the popularity of modularized JavaScript pre-dates ES6. Node.js, a JavaScript runtime environment, used CommonJS as the specification for modules. Because so many existing applications were built with CommonJS, when Node.js added support for native ES modules, it controversially introduced the MJS file extension to differentiate the two and prevent applications from breaking.

NOTE: Some developers informally refer to MJS files as "Michael Jackson Script" files.

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Programs that open MJS files

Updated November 8, 2018

Verified by FileInfo.com

The FileInfo.com team has independently researched the Node.js ES Module file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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