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Technologies

What is tailwindcss built with?

tailwindcss is a TypeScript repo built with H3 and Vite. It is tested with libfuzzer-sys, @playwright/test, and Vitest and deploys with log, tracing, and tracing-subscriber. It has 165,694 written lines, with 137 test files.

Read on November 4, 2026, at commit 2626ae6. Read it as markdown

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tailwindcss

Support

Testing

  • libfuzzer-sys

Deploy

Tools

  • proc-macro2
  • quote1 file
  • syn1 file

Other

  • bstr8 files
  • dunce6 files
  • rustc-hash4 files
  • walkdir3 files
  • globset2 files
  • regex2 files
  • regex-automata2 files
  • winapi-util2 files
  • memchr1 file
  • rayon1 file
  • same-file1 file

crates/node

crates/node

Support

Tools

  • napi-derive1 file

Other

  • napi
  • rayon

packages/@tailwindcss-browser

packages/@tailwindcss-browser

Support

The base

  • H31 file

Testing

  • @playwright/test1 file

packages/@tailwindcss-cli

packages/@tailwindcss-cli

Support

Testing

  • Vitest4 files

Other

  • picocolors2 files

packages/@tailwindcss-node

Frontend

Styles

  • lightningcss1 file
packages/@tailwindcss-node

Support

Testing

  • Vitest3 files

Tools

  • jiti1 file
  • magic-string1 file
  • source-map-js1 file

packages/@tailwindcss-postcss

Frontend

Styles

  • PostCSS3 files
  • postcss-import2 files
packages/@tailwindcss-postcss

Support

Testing

  • Vitest3 files

Other

  • dedent2 files

packages/@tailwindcss-standalone

Frontend

Styles

  • tailwindcss1 file
packages/@tailwindcss-standalone

packages/@tailwindcss-turbopack

packages/@tailwindcss-turbopack

Support

Tools

  • Webpack1 file

packages/@tailwindcss-upgrade

Frontend

Styles

  • PostCSS18 files
  • postcss-selector-parser1 file
packages/@tailwindcss-upgrade

Support

Testing

  • Vitest28 files

Tools

  • globby2 files
  • Prettier1 file
  • tree-sitter1 file
  • tree-sitter-typescript1 file

Other

  • picocolors3 files
  • dedent1 file
  • SemVer1 file

packages/@tailwindcss-vite

Frontend

The base

packages/@tailwindcss-vite

packages/@tailwindcss-webpack

packages/@tailwindcss-webpack

Support

Tools

  • Webpack1 file

packages/tailwindcss

packages/tailwindcss

Support

Testing

  • Vitest58 files
  • @playwright/test1 file

Tools

  • magic-string1 file
  • source-map-js1 file

Other

  • dedent5 files

Other repos with a similar stack

Ordered by how much of its stack they share with tailwindcss, then by stars.

Frequently asked questions

What language is tailwindcss written in?
tailwindcss is written in TypeScript, with 165,694 written lines.
What framework does tailwindcss use?
tailwindcss is built with H3 and Vite.
Does tailwindcss have tests?
Yes. tailwindcss has 137 test files and is tested with libfuzzer-sys, @playwright/test, and Vitest.
Which repos have a stack like tailwindcss's?
The ones that share most of its stack:CapSoftware/CapNousResearch/hermes-agentclash-verge-rev/clash-verge-rev

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