# evanw/esbuild

An extremely fast bundler for the web

Repository: https://github.com/evanw/esbuild
Canonical: https://ross.abutalabs.com/products/esbuild
Homepage: https://esbuild.github.io/
Language: Go
License: MIT
License Family: permissive
Topics: typescript, minifier, javascript, commonjs, compiler, jsx, tsx, css, react, bundler, esm
Last push: 2026-08-09T17:20:12+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 96, release rhythm 96, longevity 100
- inputs: {"age_days": 3732, "days_push": 24, "days_rel": 25, "gap_med": 22.0, "n_releases_24m": 27}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 40018, forks 1339 (observed 2026-08-28T04:12:08.091614+00:00)

## What it is
esbuild is an extremely fast JavaScript/TypeScript bundler and minifier written in Go. It bundles ESM and CommonJS modules, CSS, JSX, and TSX with tree shaking, minification, source maps, a local dev server, watch mode, and a plugin API.

## Use cases
- bundle a javascript or typescript project for production
- minify js and css with source maps
- replace webpack with a much faster build tool
- bundle jsx and tsx for a react app
- run a local dev server with watch mode and rebuilds
- compile typescript without a separate transpiler step
- bundle css including css modules

## When to choose
- you need very fast bundling of JS/TS/CSS without heavy configuration
- you want built-in TypeScript and JSX transpilation without Node-based toolchains
- you need tree shaking, minification, and source maps out of the box
- you want a simple CLI, JS, or Go API for builds

## When to avoid
- you need advanced webpack-specific loaders or a huge plugin ecosystem
- you need full TypeScript type checking during the build (esbuild strips types without checking)
- you rely on very new or experimental CSS/JS syntax not yet supported
- you need code splitting features beyond what esbuild supports

## Facets
- artifact type: cli-tool
- maturity: stable
- function: build-tool, compiler, cli, developer-tools
- domain: web-development, frontend, developer-tools
- platform: cross-platform, cli, go
- tags: bundler, minifier, tree-shaking, typescript, jsx, css, esm, commonjs, source-maps, dev-server, javascript, nodejs

## Member repositories
- evanw/esbuild (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:08.091614+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 2026-08-29T16:24:05.476758+00:00, confidence not recorded.
  - readme: https://github.com/evanw/esbuild (fetched 2026-08-28T04:12:08.091614+00:00, sha d9233b2fb0eb)
  - homepage: https://esbuild.github.io/ (fetched 2026-08-29T07:46:32.826633+00:00, sha 39b8e79e00b9)
- Data as of 2026-08-30T08:39:29.467469+00:00.