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:261

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

Default

false

See

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

---

bundle?

optional bundle: boolean

Defined in: types.ts:155

Deprecated

Use unbundle instead.

Default

true

---

clean?

optional clean: boolean | string[]

Defined in: types.ts:117

Clean directories before build.

Default to output directory.

Default

true

---

config?

optional config: string | boolean

Defined in: types.ts:206

Config file path

---

copy?

optional copy: CopyOptions | CopyOptionsFn

Defined in: types.ts:304

Copy files to another directory.

Example

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

---

cwd?

optional cwd: string

Defined in: types.ts:351

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:157

---

dts?

optional dts: boolean | Options

Defined in: types.ts:238

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:287

Compile-time env variables.

Example

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

---

exports?

optional exports: boolean | ExportsOptions

Defined in: types.ts:275

[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:361

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

---

fixedExtension?

optional fixedExtension: boolean

Defined in: types.ts:173

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

---

format?

optional format: ModuleFormat | ModuleFormat[]

Defined in: types.ts:105

Default

['es']

---

fromVite?

optional fromVite: boolean | "vitest"

Defined in: types.ts:228

Reuse config from Vite or Vitest (experimental)

Default

false

---

globalName?

optional globalName: string

Defined in: types.ts:106

---

hash?

optional hash: boolean

Defined in: types.ts:344

If enabled, appends hash to chunk filenames.

Default

true

---

hooks?

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

Defined in: types.ts:306

---

ignoreWatch?

optional ignoreWatch: string | string[]

Defined in: types.ts:209

---

inputOptions?

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

Defined in: types.ts:96

---

loader?

optional loader: ModuleTypes

Defined in: types.ts:199

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:119

Default

false

---

name?

optional name: string

Defined in: types.ts:165

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:338

• 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:214

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

---

outDir?

optional outDir: string

Defined in: types.ts:108

Default

'dist'

---

outExtensions?

optional outExtensions: OutExtensionFactory

Defined in: types.ts:178

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

---

outputOptions?

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

Defined in: types.ts:180

---

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:189

---

publicDir?

optional publicDir: CopyOptions | CopyOptionsFn

Defined in: types.ts:292

Deprecated

Alias for copy, will be removed in the future.

---

publint?

optional publint: boolean | Options

Defined in: types.ts:252

Run publint after bundling. Requires publint to be installed.

Default

false

---

removeNodeProtocol?

optional removeNodeProtocol: boolean

Defined in: types.ts:320

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:267

Enable size reporting after bundling.

Default

true

---

shims?

optional shims: boolean

Defined in: types.ts:159

Default

false

---

silent?

optional silent: boolean

Defined in: types.ts:202

Default

false

---

skipNodeModulesBundle?

optional skipNodeModulesBundle: boolean

Defined in: types.ts:222

Skip bundling node_modules.

Default

false

---

sourcemap?

optional sourcemap: Sourcemap

Defined in: types.ts:110

Default

false

---

target?

optional target: string | false | string[]

Defined in: types.ts:142

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:188

Default

true

---

tsconfig?

optional tsconfig: string | boolean

Defined in: types.ts:83

---

unbundle?

optional unbundle: boolean

Defined in: types.ts:149

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:245

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:208

Default

false

---

workspace?

optional workspace: true | Workspace | Arrayable<string>

Defined in: types.ts:357

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