🚀 Features

• Export tsdown version  -  by @userquin in #976 (a0938)

   🐞 Bug Fixes

• Respect failOnWarn regardless of logger level  -  by @spokodev and @sxzz in #960 (f635a)
• create-tsdown: Skip cd hint for current directory  -  by @jong-kyung in #1002 (66983)
• css: Generate source maps to avoid SOURCEMAP_BROKEN warning  -  by @ocavue in #982 (84b7c)
• pkg: Await readFile before removing temp pack directory  -  by @azais-corentin in #999 (c0a48)

   🏎 Performance

• Reduce install size  -  by @sxzz (10e6f)
• css: Reuse Sass async compiler  -  by @sxzz in #1001 (0aa2b)

    View changes on GitHub

   🚨 Breaking Changes

• Drop node 24.0 - 24.10 support  -  by @sxzz (a2eac)

   🐞 Bug Fixes

• Inline CI detection  -  by @sxzz (bfc64)

   🏎 Performance

• css: Skip renderChunk when no CSS has been collected  -  by @ShMcK in #967 (9f051)

    View changes on GitHub

   🐞 Bug Fixes

• Pin rolldown to minor  -  by @sxzz (69e78)

    View changes on GitHub

   🚀 Features

• dts: Add deps.dts option to override dependency bundling for declaration files  -  by @sxzz (881bf)

   🐞 Bug Fixes

• Improve error handling for unsupported TypeScript syntax on Node.js  -  by @sxzz (b93db)
• Add extra space for emoji rendering in Windows Terminal  -  by @sxzz (925cc)
• unbundle: Add shims support for unbundled builds  -  by @sxzz (fc991)

    View changes on GitHub

   🚨 Breaking Changes

• Drop Node.js < 22.18.0 support, make unrun optional, add tsx config loader  -  by @sxzz (a1042)
• dts: Auto-enable dts when tsconfig declaration is true  -  by @sxzz in #872 (085f0)
• publint: Use pkg from publint results, require publint v0.3.8+  -  by @sxzz (413bb)

   🚀 Features

• Upgrade rolldown to 1.0.0-rc.18  -  by @sxzz (66085)
• Upgrade rolldown to v1.0.0  -  by @sxzz (fabba)
• exports: Auto-enable bin detection by default  -  by @sxzz in #873 (abda9)

   🐞 Bug Fixes

• Explicitly drop node 23 support  -  by @sxzz (85e65)
• debug: Enhance debug logging for pack tarball  -  by @sxzz and Copilot (5de04)
• exports: Detect types fields nested in conditional exports  -  by @sxzz (82fa1)
• pkg: Fix duplicate configuration warning logic  -  by @ho991217 and @sxzz in #935 (6a0d9)

🔄 Migration Guide

Node.js version

Upgrade to Node.js 22.18.0 or later. Bun and Deno remain supported (experimental).

unrun is no longer bundled

If your environment relies on the unrun config loader (i.e. you're on a Node version without native TypeScript support and use the default auto loader), install it manually:

npm i -D unrun
# or, alternatively, the new tsx loader:
npm i -D tsx

If you use Node.js 22.18.0+ with native TypeScript support, no change is needed — the auto loader will pick native.

dts auto-enabled from tsconfig

If your tsconfig.json has compilerOptions.declaration: true but you do not want tsdown to emit .d.ts files, opt out explicitly:

// tsdown.config.ts
export default defineConfig({
  dts: false,
})

exports.bin auto-detection

Any entry chunk containing a shebang (e.g. #!/usr/bin/env node) now causes tsdown to write a bin field in package.json automatically. The semantics differ slightly from explicit bin: true:

To opt out entirely:

export default defineConfig({
  exports: { bin: false },
})

Links

• tsdown Documentation
• v0.22.0-beta.1 Release
• v0.22.0-beta.2 Release
• v0.22.0-beta.3 Release
• Full diff from v0.21.10

No significant changes

    View changes on GitHub

   🚀 Features

• Upgrade rolldown to 1.0.0-rc.18  -  by @sxzz (66085)

    View changes on GitHub

   🚨 Breaking Changes

• Drop Node.js < 22.18.0 support, make unrun optional, add tsx config loader  -  by @sxzz (a1042)
• dts: Auto-enable dts when tsconfig declaration is true  -  by @sxzz in #872 (085f0)
• publint: Use pkg from publint results, require publint v0.3.8+  -  by @sxzz (413bb)

Migration Guide

Node.js version

Upgrade to Node.js 22.18.0 or later. Bun and Deno remain supported (experimental).

unrun is no longer bundled

If your environment relies on the unrun config loader (i.e. you're on a Node version without native TypeScript support and use the default auto loader), install it manually:

npm i -D unrun
# or, alternatively, the new tsx loader:
npm i -D tsx

If you use Node.js 22.18.0+ with native TypeScript support, no change is needed — the auto loader will pick native.

dts auto-enabled from tsconfig

If your tsconfig.json has compilerOptions.declaration: true but you do not want tsdown to emit .d.ts files, opt out explicitly:

// tsdown.config.ts
export default defineConfig({
  dts: false,
})

exports.bin auto-detection

Any entry chunk containing a shebang (e.g. #!/usr/bin/env node) now causes tsdown to write a bin field in package.json automatically. The semantics differ slightly from explicit bin: true:

To opt out entirely:

export default defineConfig({
  exports: { bin: false },
})

   🚀 Features

• exports: Auto-enable bin detection by default  -  by @sxzz in #873 (abda9)

   🐞 Bug Fixes

• debug: Enhance debug logging for pack tarball  -  by @sxzz and Copilot (5de04)
• exports: Detect types fields nested in conditional exports  -  by @sxzz (82fa1)

    View changes on GitHub

   🚀 Features

• Upgrade rolldown  -  by @sxzz (8a449)

    View changes on GitHub

   🚀 Features

• Upgrade rolldown  -  by @sxzz (2d74e)
• config: Track transitive config dependencies for watch reload  -  by @sxzz in #919 (16e27)
• exports: Add bin to publishConfig when devExports is enabled  -  by @sxzz in #911 (60592)
• plugin: Add tsdownConfig and tsdownConfigResolved plugin hooks  -  by @sxzz in #918 (665e5)

   🐞 Bug Fixes

• Skip package.json writting when content is deeply equal  -  by @ocavue and @sxzz in #913 (d8e1c)
• Skip Node.js version check in Bun  -  by @sxzz (38afd)
• css: Detect css modules from full id for vue virtual sfc styles  -  by @sxzz in #917 (e6021)

    View changes on GitHub