# volarjs/volar.js

💙🌊

Repository: https://github.com/volarjs/volar.js
Canonical: https://ross.abutalabs.com/products/volarjs
Homepage: https://volarjs.dev/
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-03-05T03:49:43+00:00

## Health v2 (maintenance only)
Score: 64/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 70, release rhythm 40, longevity 95
- inputs: {"age_days": 1333, "days_push": 181, "days_rel": 495, "gap_med": 22, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1255, forks 76 (observed 2026-08-28T04:04:08.859254+00:00)

## What it is
Volar.js is a framework for building language tooling for embedded languages, powering language servers like Vue, Astro, and MDX. It provides modular packages for virtual code processing, language services, and LSP server/client implementations that work across editors.

## Use cases
- build a language server for a custom or embedded language
- add IntelliSense, diagnostics, and auto-completion to a DSL
- create a VS Code extension with LSP support for a new language
- integrate language services into Monaco Editor
- run diagnostics and formatting for a language in Node.js tooling
- reuse language services across multiple editors and IDEs

## When to choose
- you are building editor tooling for a language or framework with embedded code blocks
- you want LSP-based features without implementing the protocol yourself
- you need language support that works across VS Code, Monaco, and other editors

## When to avoid
- you only need simple syntax highlighting without semantic features
- your language is not embedded and a standard LSP toolkit suffices
- you need a ready-made end-user editor rather than a tooling framework

## Facets
- artifact type: framework
- maturity: active
- function: editor, developer-tools, parser, documentation
- domain: developer-tools, programming-languages, text-editors, web-development
- platform: cross-platform, editor-plugin
- tags: language-server-protocol, lsp, embedded-languages, editor-tooling, intellisense, virtual-code, monaco-editor, vscode, nodejs

## Member repositories
- volarjs/volar.js (main) score 64

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:08.859254+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 2026-08-30T05:07:22.153120+00:00, confidence not recorded.
  - readme: https://github.com/volarjs/volar.js (fetched 2026-08-28T04:04:08.859254+00:00, sha b0331ee8a629)
  - homepage: https://volarjs.dev/ (fetched 2026-08-29T12:17:54.769930+00:00, sha a859836d4c27)
  - site_page: https://volarjs.dev/core-concepts/why-volar (fetched 2026-08-29T12:17:54.778767+00:00, sha 43ffe5667eb1)
- Data as of 2026-08-30T08:39:29.467469+00:00.