# NicolasPetton/Indium

A JavaScript development environment for Emacs

Repository: https://github.com/NicolasPetton/Indium
Canonical: https://ross.abutalabs.com/products/indium
Homepage: https://indium.readthedocs.io
Language: Emacs Lisp
License: GPL-3.0
License Family: copyleft
Topics: emacs, javascript, debugger, inspector, repl, chrome, nodejs
Archived: true
Last push: 2023-06-01T20:44:29+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3751, "days_push": 1189, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1132, forks 64 (observed 2026-08-28T04:03:42.681677+00:00)

## What it is
Indium is a JavaScript development environment for Emacs that connects to a Chrome/Chromium browser tab or a Node.js process. It provides a REPL with completion, an object inspector, a stepping debugger, and in-buffer JavaScript evaluation.

## Use cases
- debug javascript from emacs
- run a nodejs repl inside emacs
- inspect javascript objects in emacs
- step through javascript code like edebug
- evaluate javascript in the current buffer
- connect emacs to a chrome tab for development

## When to choose
- you develop JavaScript in Emacs and want an IDE-like REPL and debugger
- you prefer Emacs tooling over browser DevTools for Node.js or Chrome debugging
- you want a cider-like experience for JavaScript

## When to avoid
- you use VS Code or another editor with built-in JS debugging
- you need a Firefox backend or DOM/network inspector
- you want a project with frequent updates and active maintenance

## Facets
- artifact type: plugin
- maturity: maintenance
- function: cli, developer-tools
- domain: developer-tools, web-development, text-editors
- platform: editor-plugin, browser
- tags: emacs, emacs-lisp, repl, inspector, javascript-debugging, chrome-devtools, debugger, javascript, nodejs

## Member repositories
- NicolasPetton/Indium (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:42.681677+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:37:55.531580+00:00, confidence not recorded.
  - readme: https://github.com/NicolasPetton/Indium (fetched 2026-08-28T04:03:42.681677+00:00, sha f3e7913514c7)
- Data as of 2026-08-30T08:39:29.467469+00:00.