Interface: Options

Defined in: types.ts:69

Options for tsdown.

Properties

alias?

optional alias: Record<string, string>

Defined in: types.ts:82

---

attw?

optional attw: boolean | AttwOptions

Defined in: types.ts:263

Run arethetypeswrong after bundling. Requires @arethetypeswrong/core to be installed.

Default

false

See

https://github.com/arethetypeswrong/arethetypeswrong.github.io

---

banner?

optional banner: ChunkAddon

Defined in: types.ts:365

---

bundle?

optional bundle: boolean

Defined in: types.ts:156

Deprecated

Use unbundle instead.

Default

true

---

clean?

optional clean: boolean | string[]

Defined in: types.ts:118

Clean directories before build.

Default to output directory.

Default

true

---

config?

optional config: string | boolean

Defined in: types.ts:208

Config file path

---

copy?

optional copy: CopyOptions | CopyOptionsFn

Defined in: types.ts:306

Copy files to another directory.

Example

[
  'src/assets',
  { from: 'src/assets', to: 'dist/assets' },
]

---

cwd?

optional cwd: string

Defined in: types.ts:353

The working directory of the config file.

• Defaults to process.cwd() for root config.
• Defaults to the package directory for workspace config.

---

define?

optional define: Record<string, string>

Defined in: types.ts:158

---

dts?

optional dts: boolean | Options

Defined in: types.ts:240

Emit TypeScript declaration files (.d.ts).

By default, this feature is auto-detected based on the presence of the types field in the package.json file.

• If the types field is present in package.json, declaration file emission is enabled.
• If the types field is absent, declaration file emission is disabled by default.

---

entry?

optional entry: InputOption

Defined in: types.ts:74

Defaults to 'src/index.ts' if it exists.

---

env?

optional env: Record<string, any>

Defined in: types.ts:289

Compile-time env variables.

Example

{
  "DEBUG": true,
  "NODE_ENV": "production"
}

---

exports?

optional exports: boolean | ExportsOptions

Defined in: types.ts:277

[experimental] Generate package exports for package.json.

This will set the main, module, types, exports fields in package.json to point to the generated files.

---

external?

optional external: ExternalOption

Defined in: types.ts:75

---

filter?

optional filter: string | RegExp | string[]

Defined in: types.ts:363

Filter workspace packages. This option is only available in workspace mode.

---

fixedExtension?

optional fixedExtension: boolean

Defined in: types.ts:174

Use a fixed extension for output files. The extension will always be .cjs or .mjs. Otherwise, it will depend on the package type.

Default

false

---

footer?

optional footer: ChunkAddon

Defined in: types.ts:364

---

format?

optional format: ModuleFormat | ModuleFormat[]

Defined in: types.ts:106

Default

['es']

---

fromVite?

optional fromVite: boolean | "vitest"

Defined in: types.ts:230

Reuse config from Vite or Vitest (experimental)

Default

false

---

globalName?

optional globalName: string

Defined in: types.ts:107

---

hash?

optional hash: boolean

Defined in: types.ts:346

If enabled, appends hash to chunk filenames.

Default

true

---

hooks?

optional hooks: Partial<TsdownHooks> | (hooks) => Awaitable<void>

Defined in: types.ts:308

---

ignoreWatch?

optional ignoreWatch: string | string[]

Defined in: types.ts:211

---

inputOptions?

optional inputOptions: InputOptions | (options, format, context) => Awaitable<null | void | InputOptions>

Defined in: types.ts:96

---

loader?

optional loader: ModuleTypes

Defined in: types.ts:201

Sets how input files are processed. For example, use 'js' to treat files as JavaScript or 'base64' for images. Lets you import or require files like images or fonts.

Example

{ '.jpg': 'asset', '.png': 'base64' }

---

minify?

optional minify: boolean | "dce-only" | BindingMinifyOptions

Defined in: types.ts:120

Default

false

---

name?

optional name: string

Defined in: types.ts:166

The name to show in CLI output. This is useful for monorepos or workspaces. Defaults to the package name from package.json.

---

nodeProtocol?

optional nodeProtocol: boolean | "strip"

Defined in: types.ts:340

• If true, add node: prefix to built-in modules.
• If 'strip', strips the node: protocol prefix from import source.
• If false, does not modify the import source.

Default

false

Example

// With nodeProtocol enabled:
import('fs'); // becomes import('node:fs')
// With nodeProtocol set to 'strip':
import('node:fs'); // becomes import('fs')
// With nodeProtocol set to false:
import('node:fs'); // remains import('node:fs')

---

noExternal?

optional noExternal: Arrayable<string | RegExp> | (id, importer) => undefined | null | boolean | void

Defined in: types.ts:76

---

onSuccess?

optional onSuccess: string | (config, signal) => void | Promise<void>

Defined in: types.ts:216

You can specify command to be executed after a successful build, specially useful for Watch mode

---

outDir?

optional outDir: string

Defined in: types.ts:109

Default

'dist'

---

outExtensions?

optional outExtensions: OutExtensionFactory

Defined in: types.ts:179

Custom extensions for output files. fixedExtension will be overridden by this option.

---

outputOptions?

optional outputOptions: OutputOptions | (options, format, context) => Awaitable<null | void | OutputOptions>

Defined in: types.ts:181

---

platform?

optional platform: "node" | "neutral" | "browser"

Defined in: types.ts:95

Specifies the target runtime platform for the build.

• node: Node.js and compatible runtimes (e.g., Deno, Bun). For CJS format, this is always set to node and cannot be changed.
• neutral: A platform-agnostic target with no specific runtime assumptions.
• browser: Web browsers.

Default

'node'

See

https://tsdown.dev/options/platform

---

plugins?

optional plugins: RolldownPluginOption<any>

Defined in: types.ts:191

---

publicDir?

optional publicDir: CopyOptions | CopyOptionsFn

Defined in: types.ts:294

Deprecated

Alias for copy, will be removed in the future.

---

publint?

optional publint: boolean | Options

Defined in: types.ts:254

Run publint after bundling. Requires publint to be installed.

Default

false

---

removeNodeProtocol?

optional removeNodeProtocol: boolean

Defined in: types.ts:322

If enabled, strips the node: protocol prefix from import source.

Default

false

Deprecated

Use nodeProtocol: 'strip' instead.

Example

// With removeNodeProtocol enabled:
import('node:fs'); // becomes import('fs')

---

report?

optional report: boolean | ReportOptions

Defined in: types.ts:269

Enable size reporting after bundling.

Default

true

---

shims?

optional shims: boolean

Defined in: types.ts:160

Default

false

---

silent?

optional silent: boolean

Defined in: types.ts:204

Default

false

---

skipNodeModulesBundle?

optional skipNodeModulesBundle: boolean

Defined in: types.ts:224

Skip bundling node_modules.

Default

false

---

sourcemap?

optional sourcemap: Sourcemap

Defined in: types.ts:111

Default

false

---

target?

optional target: string | false | string[]

Defined in: types.ts:143

Specifies the compilation target environment(s).

Determines the JavaScript version or runtime(s) for which the code should be compiled. If not set, defaults to the value of engines.node in your project's package.json.

Accepts a single target (e.g., 'es2020', 'node18') or an array of targets.

See

https://tsdown.dev/options/target#supported-targets for a list of valid targets and more details.

Examples

// Target a single environment
{ "target": "node18" }

// Target multiple environments
{ "target": ["node18", "es2020"] }

---

treeshake?

optional treeshake: boolean

Defined in: types.ts:190

Default

true

---

tsconfig?

optional tsconfig: string | boolean

Defined in: types.ts:83

---

unbundle?

optional unbundle: boolean

Defined in: types.ts:150

Determines whether unbundle mode is enabled. When set to true, the output files will mirror the input file structure.

Default

false

---

unused?

optional unused: boolean | Options

Defined in: types.ts:247

Enable unused dependencies check with unplugin-unused Requires unplugin-unused to be installed.

Default

false

---

watch?

optional watch: string | boolean | string[]

Defined in: types.ts:210

Default

false

---

workspace?

optional workspace: true | Workspace | Arrayable<string>

Defined in: types.ts:359

[experimental] Enable workspace mode. This allows you to build multiple packages in a monorepo.