v2.31.1

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Patch Changes

• #​2159 15cf592 Thanks @​ingvaldlorentzen! - Fixed already-published version detection with npm 12, which always wraps successful npm info --json output in an array. The unwrapped output made changeset publish treat every package as unpublished and fail attempting to republish existing versions.

v3.7.0

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Minor Changes

• Feat: update dependencies #463 25f1200 @​ymehmetcan

v3.3.0

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Minor Changes

• Feat: update dependencies #463 25f1200 @​ymehmetcan

v9.39.5

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Bug Fixes

• 253be16 fix: handle unavailable require cache (backport of #​20812 to v9.x) (#​21065) (Eric)

Documentation

• 74930ed docs: switch build to Node.js 24 (#​20894) (Milos Djermanovic)
• eaec8bb docs: Add ESLint v9.x EOL notice (#​20828) (Milos Djermanovic)

Chores

• 458205f chore: update @eslint/eslintrc and @eslint/js for v9.39.5 (#​21077) (Francesco Trotta)
• 202117b chore: package.json update for @​eslint/js release (Jenkins)
• d9eb6ed test: disable warning for vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER (#​21074) (Francesco Trotta)
• 7b431a7 chore: override re2 dependency for @metascraper/helpers (#​21068) (Milos Djermanovic)
• daf7791 chore: pin fflate@​0.8.2 (#​20895) (Milos Djermanovic)
• daee8ba ci: use pnpm in eslint-flat-config-utils type integration test (#​20829) (Milos Djermanovic)
• 116d4be ci: unpin Node.js 25.x in CI (#​20619) (Copilot)

v9.4.1

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• Fix type definitions (#​257) 431ebc4

v3.9.5

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diff

Markdown: Cap ordered list mark at 999,999,999 (#​19351 by @​tats-u)

CommonMark parsers only support ordered list item numbers up to 999,999,999.

With this change, Prettier now caps the ordered list item number at 999,999,999 to ensure that the output is correctly parsed as an ordered list by CommonMark parsers. Numbers larger than 999,999,999 are not parsed as list item numbers and are left unchanged in the output:

<!-- Input -->
999999998. text
999999998. text
999999998. text
999999998. text

1234567890123456789012) text

<!-- Prettier 3.9.4 -->
999999998. text
999999999. text
1000000000. text
1000000001. text

1234567890123456789012) text

<!-- Prettier 3.9.5 -->
999999998. text
999999999. text
999999999. text
999999999. text

1234567890123456789012) text

Markdown: Avoid corrupting empty link with title (#​19487 by @​andersk)

Do not remove <> from an inline link or image with an empty URL and a title, as this removal would change its interpretation.

<!-- Input -->
[link](<> "title")

<!-- Prettier 3.9.4 -->
[link]( "title")

<!-- Prettier 3.9.5 -->
[link](<> "title")

Less: Remove extra spaces after [ in map lookups (#​19503 by @​kovsu)

// Input
.foo {
  color: #theme[ primary];
  color: #theme[@​name];
  color: #theme[@​@​name];
}

// Prettier 3.9.4
.foo {
  color: #theme[ primary];
  color: #theme[ @​name];
  color: #theme[ @​@​name];
}

// Prettier 3.9.5
.foo {
  color: #theme[primary];
  color: #theme[@​name];
  color: #theme[@​@​name];
}

CSS: Prevent addition space in type() with + (#​19516 by @​bigandy)

This fixes the addition space before + in CSS type() declaration. For example type(<number>+) was being converted into type(<number> +) which is invalid CSS and does not work.

/* Input */
div {
  border-radius: attr(br type(<length>+));
}

/* Prettier 3.9.4 */
div {
  border-radius: attr(br type(<length> +));
}

/* Prettier 3.9.5 */
div {
  border-radius: attr(br type(<length>+));
}

Less: Remove spaces between merge markers and colons (#​19517 by @​kovsu)

// Input
a {
  box-shadow  +  : 0 0 1px #​000;
}

// Prettier 3.9.4
a {
  box-shadow+  : 0 0 1px #​000;
}

// Prettier 3.9.5
a {
  box-shadow+: 0 0 1px #​000;
}

Markdown: Preserve wiki links with aliases (#​19527 by @​kovsu)

<!-- Input -->
[[Foo:Bar]]

<!-- Prettier 3.9.4 -->
[[Foo]]

<!-- Prettier 3.9.5 -->
[[Foo:Bar]]

TypeScript: Fix comments being dropped on shorthand type import/export specifiers (#​19565 by @​kirkwaiblinger)

// Input
export { type /* comment */ T } from "foo";
import { type /* comment */ T } from "foo";

// Prettier 3.9.4
Error: Comment "comment" was not printed. Please report this error!

// Prettier 3.9.5
export { type /* comment */ T } from "foo";
import { type /* comment */ T } from "foo";

Miscellaneous: Preserving comments' placement property (#​19567 by @​Janther)

Prettier@​3.9.0 deleted an undocumented property on comments, which was already used by plugins, comment.placement is now available again after comment attach.

Flow: Stop enforcing empty module declaration to break (#​19568 by @​fisker)

// Input
declare module "foo" {}

// Prettier 3.9.4
declare module "foo" {
}

// Prettier 3.9.5
declare module "foo" {}

Angular: Support expression for exhaustive typechecking (#​19571 by @​fisker)

<!-- Input -->
@&#8203;switch (state.mode) {
  @&#8203;default never(state);
}

<!-- Prettier 3.9.4 -->
@&#8203;switch (state.mode) {
  @&#8203;default never;
}

<!-- Prettier 3.9.5 -->
@&#8203;switch (state.mode) {
  @&#8203;default never(state);
}

TypeScript: Ignore comments inside mapped type when checking type parameter comments (#​19572 by @​fisker)

// Input
foo<{
  // comment
  [key in keyof Foo]: number
}>();

// Prettier 3.9.4
foo<
  {
    // comment
    [key in keyof Foo]: number;
  }
>();

// Prettier 3.9.5
foo<{
  // comment
  [key in keyof Foo]: number;
}>();

Less: Fix adjacent block comments being corrupted (#​19574 by @​kovsu)

// Input
/* a *//* b */
/* a */* {
  color: red;
}

// Prettier 3.9.4
/* a */
/* b */
/* a * {
  color: red;
}

// Prettier 3.9.5
/* a */ /* b */
/* a */
* {
  color: red;
}

JavaScript: Handle dangling comments in SwitchStatement (#​19581 by @​fisker)

// Input
switch (foo) {
 // comment
}

// Prettier 3.9.4
switch (
  foo
  // comment
) {
}

// Prettier 3.9.5
switch (foo) {
  // comment
}

TypeScript: Remove space in comment-only object type (#​19583 by @​fisker)

// Input
var foo = {
  /* comment */
};
type Foo = {
  /* comment */
};

// Prettier 3.9.4
var foo = {/* comment */};
type Foo = { /* comment */ };

// Prettier 3.9.5
var foo = {/* comment */};
type Foo = {/* comment */};

v3.9.4

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v3.9.3

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v3.9.2

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v3.9.1

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v3.9.0

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diff

🔗 Release Notes

v3.8.5

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v3.8.4

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diff

Markdown: Fix blank lines between list items and nested sub-lists being removed in Markdown/MDX (#​17746 by @​byplayer)

Prettier was removing blank lines between list items and their nested sub-lists, converting loose lists into tight lists and changing their semantic meaning.

<!-- Input -->
- a

  - b

- c

  - d

<!-- Prettier 3.8.3 -->
- a
  - b
- c
  - d

<!-- Prettier 3.8.4 -->
- a

  - b

- c

  - d

v0.22.9

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   🚀 Features

• Upgrade rolldown to v1.2  -  by @​sxzz (91bb5)

   🐞 Bug Fixes

• deps: Check dynamic imports in onlyImport  -  by @​sxzz in #​1019 (a625a)

    View changes on GitHub

v0.22.8

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   🚀 Features

• deps: Add onlyImport option  -  by @​sxzz and Claude Fable 5 (c5798)

   🐞 Bug Fixes

• config: Concat plugins arrays when merging config  -  by @​sxzz (b1c80)

    View changes on GitHub

v0.22.7

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   🚀 Features

• logger: Add suppressWarnings option to filter warnings  -  by @​sxzz (dc510)

    View changes on GitHub

v0.22.6

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No significant changes

    View changes on GitHub

v0.22.5

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   🚀 Features

• Support TS 7  -  by @​sxzz (b21f1)

   🐞 Bug Fixes

• Evaluate banner/footer function addon per chunk  -  by @​spokodev in #​1011 (517c5)
• shims: Don't emit esm shim banner in cjs output for unbundle  -  by @​materwelonDhruv in #​991 (4bb30)

    View changes on GitHub

v0.22.4

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   🚀 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

v0.22.3

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   🚨 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

v0.22.2

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   🐞 Bug Fixes

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

    View changes on GitHub

v0.22.1

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   🚀 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

v0.22.0

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   🚨 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