MJS2CJS(1)

📦
version 0.17.8 · 7 versions
, in ubuntu stonking

💖 MJS2CJS — the manual page, but make it slay 💖

okay bestie, sit down, hydrate, and let me tell you about mjs2cjs — it's a little user command and it's honestly lowkey iconic. ✨

🌸 NAME 🌸

mjs2cjs — no cap, that's literally the name. mjs2cjs. That's it. That's the name. 💅

🎀 SYNOPSIS 🎀

mjs2cjs <start_file>

🦋 DESCRIPTION 🦋

so here's the tea: mjs2cjs uses a generic rollup.config.mjs to generate a commonjs file in the dist subdirectory. fr fr, that's the whole job. 🫶

and where does the output name come from? bestie it's extracted from package.json — specifically the "main" field — and if that's not there, it falls back to index.cjs. simple as. 🌈

✨ OPTIONS ✨

  • -b — ("bundle") 💫 build a bundle file
  • -o — ("out") 📝 outfile
  • -a — ("auto") 🤖 automatically transform a "type:module" package into a mix of cjs/mjs

👑 a note about the -a option (read this one, bestie) 👑

ngl this one is doing the most, and you need to know what it's doing:

  • it does not only build the commonjs file — it also modifies package.json. the audacity, honestly. 😭
  • and if a debian/index.cjs exists, it gets installed and used in the "package.json"->exports->require field. this lets you write a wrapper when the API changes. very main character of it. 💅
  • option -a is usable if and only if the module is a pure ES module — aka it's declared as type:module in package.json. if it's not, it's a no. periodt. ⭐
  • Copyright © Yadd <yadd@debian.org> 🫶
  • Licensed under GPL-2+ (see /usr/share/common-licenses/GPL-2)
reminder bestie: -a literally rewrites your package.json, so know what you're signing up for before you send it. iykyk. 🙈

and that's the whole page, angel! this was mjs2cjs 0.17.8, dated August 2026 — go forth and convert your modules, you absolute legend. 💖✨🎀🦋🌸💅🫶🔥👑⭐💜

📦 where this page comes from