Interface: InlineConfig

Defined in: src/config/types.ts:607

Options for tsdown.

Extends

• UserConfig

Properties

alias?

optional alias: Record<string, string>;

Defined in: src/config/types.ts:194

Inherited from

UserConfig.alias

---

attw?

optional attw: WithEnabled<AttwOptions>;

Defined in: src/config/types.ts:540

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

Default

false

See

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

Inherited from

UserConfig.attw

---

banner?

optional banner: ChunkAddon;

Defined in: src/config/types.ts:391

Inherited from

UserConfig.banner

---

bundle?

optional bundle: boolean;

Defined in: src/config/types.ts:404

Deprecated

Use unbundle instead.

Default

true

Inherited from

UserConfig.bundle

---

checks?

optional checks: ChecksOptions & object;

Defined in: src/config/types.ts:319

Controls which warnings are emitted during the build process. Each option can be set to true (emit warning) or false (suppress warning).

Type Declaration

legacyCjs?

optional legacyCjs: boolean;

If the config includes the cjs format and one of its target >= node 20.19.0 / 22.12.0, warn the user about the deprecation of CommonJS.

Default

true

Inherited from

UserConfig.checks

---

cjsDefault?

optional cjsDefault: boolean;

Defined in: src/config/types.ts:430

Default

true

Inherited from

UserConfig.cjsDefault

---

clean?

optional clean: boolean | string[];

Defined in: src/config/types.ts:385

Clean directories before build.

Default to output directory.

Default

true

Inherited from

UserConfig.clean

---

config?

optional config: string | boolean;

Defined in: src/config/types.ts:611

Config file path

---

configLoader?

optional configLoader: "auto" | "native" | "unrun";

Defined in: src/config/types.ts:617

Config loader to use. It can only be set via CLI or API.

Default

'auto'

---

copy?

optional copy:
  | CopyOptions
  | CopyOptionsFn;

Defined in: src/config/types.ts:586

Copy files to another directory.

Example

;[
  'src/assets',
  'src/env.d.ts',
  'src/styles/**/*.css',
  { from: 'src/assets', to: 'dist/assets' },
  { from: 'src/styles/**/*.css', to: 'dist', flatten: true },
]

Inherited from

UserConfig.copy

---

css?

optional css: CssOptions;

Defined in: src/config/types.ts:566

[experimental] CSS options.

Inherited from

UserConfig.css

---

customLogger?

optional customLogger: Logger;

Defined in: src/config/types.ts:472

Custom logger.

Inherited from

UserConfig.customLogger

---

cwd?

optional cwd: string;

Defined in: src/config/types.ts:450

The working directory of the config file.

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

Inherited from

UserConfig.cwd

---

define?

optional define: Record<string, string>;

Defined in: src/config/types.ts:263

Inherited from

UserConfig.define

---

deps?

optional deps: DepsConfig;

Defined in: src/config/types.ts:174

Dependency handling options.

Inherited from

UserConfig.deps

---

devtools?

optional devtools: WithEnabled<DevtoolsOptions>;

Defined in: src/config/types.ts:498

[experimental] Enable devtools.

DevTools is still under development, and this is for early testers only.

This may slow down the build process significantly.

Default

false

Inherited from

UserConfig.devtools

---

dts?

optional dts: WithEnabled<DtsOptions>;

Defined in: src/config/types.ts:517

Enables generation of TypeScript declaration files (.d.ts).

By default, this option is auto-detected based on your project's package.json:

• If exe is enabled, declaration file generation is disabled by default.
• If the types field is present, or if the main exports contains a types entry, declaration file generation is enabled by default.
• Otherwise, declaration file generation is disabled by default.

Inherited from

UserConfig.dts

---

entry?

optional entry: TsdownInputOption;

Defined in: src/config/types.ts:169

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

Supports glob patterns with negation to exclude files:

Example

entry: {
  "hooks/*": ["./src/hooks/*.ts", "!./src/hooks/index.ts"],
}

Inherited from

UserConfig.entry

---

env?

optional env: Record<string, any>;

Defined in: src/config/types.ts:251

Compile-time env variables, which can be accessed via import.meta.env or process.env.

Example

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

Inherited from

UserConfig.env

---

envFile?

optional envFile: string;

Defined in: src/config/types.ts:257

Path to env file providing compile-time env variables.

Example

`.env`, `.env.production`, etc.

Inherited from

UserConfig.envFile

---

envPrefix?

optional envPrefix: string | string[];

Defined in: src/config/types.ts:262

When loading env variables from envFile, only include variables with these prefixes.

Default

'TSDOWN_'

Inherited from

UserConfig.envPrefix

---

exe?

optional exe: WithEnabled<ExeOptions>;

Defined in: src/config/types.ts:598

[experimental] Bundle as executable using Node.js SEA (Single Executable Applications).

This will bundle the output into a single executable file using Node.js SEA. Note that this is only supported on Node.js 25.5.0 and later, and is not supported in Bun or Deno.

Inherited from

UserConfig.exe

---

exports?

optional exports: WithEnabled<ExportsOptions>;

Defined in: src/config/types.ts:561

Generate package exports for package.json.

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

Inherited from

UserConfig.exports

---

external?

optional external: string | RegExp | (string | RegExp)[] | ExternalOptionFunction;

Defined in: src/config/types.ts:179

Deprecated

Use deps.neverBundle instead.

Inherited from

UserConfig.external

---

failOnWarn?

optional failOnWarn: boolean | CIOption;

Defined in: src/config/types.ts:468

If true, fails the build on warnings.

Default

false

Inherited from

UserConfig.failOnWarn

---

filter?

optional filter: RegExp | Arrayable<string>;

Defined in: src/config/types.ts:622

Filter configs by cwd or name.

---

fixedExtension?

optional fixedExtension: boolean;

Defined in: src/config/types.ts:413

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

Defaults to true if platform is set to node, false otherwise.

Inherited from

UserConfig.fixedExtension

---

footer?

optional footer: ChunkAddon;

Defined in: src/config/types.ts:390

Inherited from

UserConfig.footer

---

format?

optional format:
  | "es" | "cjs" | "iife" | "umd" | "commonjs" | "module" | "esm"
  | Partial<Record<"es" | "cjs" | "iife" | "umd" | "commonjs" | "module" | "esm", Partial<ResolvedConfig>>>
  | ("es" | "cjs" | "iife" | "umd" | "commonjs" | "module" | "esm")[];

Defined in: src/config/types.ts:359

Output format(s). Available formats are

• esm: ESM
• cjs: CommonJS
• iife: IIFE
• umd: UMD

Defaults to ESM.

Usage with exe

If exe is enabled, the default format will depend on support level of SEA in the target Node.js version:

• If ESM SEA is supported (Node.js > v25.7), the default format will be ESM.
• If only CJS SEA is supported, the default format will be CJS.

Inherited from

UserConfig.format

---

fromVite?

optional fromVite: boolean | "vitest";

Defined in: src/config/types.ts:478

Reuse config from Vite or Vitest (experimental)

Default

false

Inherited from

UserConfig.fromVite

---

globalName?

optional globalName: string;

Defined in: src/config/types.ts:360

Inherited from

UserConfig.globalName

---

globImport?

optional globImport: boolean;

Defined in: src/config/types.ts:553

import.meta.glob support.

See

https://vite.dev/guide/features.html#glob-import

Default

true

Inherited from

UserConfig.globImport

---

hash?

optional hash: boolean;

Defined in: src/config/types.ts:425

If enabled, appends hash to chunk filenames.

Default

true

Inherited from

UserConfig.hash

---

hooks?

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

Defined in: src/config/types.ts:588

Inherited from

UserConfig.hooks

---

ignoreWatch?

optional ignoreWatch: Arrayable<string | RegExp>;

Defined in: src/config/types.ts:487

Files or patterns to not watch while in watch mode.

Inherited from

UserConfig.ignoreWatch

---

inlineOnly?

optional inlineOnly: false | Arrayable<string | RegExp>;

Defined in: src/config/types.ts:187

Deprecated

Use deps.onlyAllowBundle instead.

Inherited from

UserConfig.inlineOnly

---

inputOptions?

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

Defined in: src/config/types.ts:335

Use with caution; ensure you understand the implications.

Inherited from

UserConfig.inputOptions

---

loader?

optional loader: ModuleTypes;

Defined in: src/config/types.ts:284

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" }

Inherited from

UserConfig.loader

---

logLevel?

optional logLevel: LogLevel;

Defined in: src/config/types.ts:463

Log level.

Default

'info'

Inherited from

UserConfig.logLevel

---

minify?

optional minify: boolean | MinifyOptions | "dce-only";

Defined in: src/config/types.ts:389

Default

false

Inherited from

UserConfig.minify

---

name?

optional name: string;

Defined in: src/config/types.ts:457

The name to show in CLI output. This is useful for monorepos or workspaces. When using workspace mode, this option defaults to the package name from package.json. In non-workspace mode, this option must be set explicitly for the name to show in the CLI output.

Inherited from

UserConfig.name

---

nodeProtocol?

optional nodeProtocol: boolean | "strip";

Defined in: src/config/types.ts:314

• 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')

Inherited from

UserConfig.nodeProtocol

---

noExternal?

optional noExternal:
  | Arrayable<string | RegExp>
  | NoExternalFn;

Defined in: src/config/types.ts:183

Deprecated

Use deps.alwaysBundle instead.

Inherited from

UserConfig.noExternal

---

onSuccess?

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

Defined in: src/config/types.ts:505

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

Inherited from

UserConfig.onSuccess

---

outDir?

optional outDir: string;

Defined in: src/config/types.ts:362

Default

'dist'

Inherited from

UserConfig.outDir

---

outExtensions?

optional outExtensions: OutExtensionFactory;

Defined in: src/config/types.ts:419

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

Inherited from

UserConfig.outExtensions

---

outputOptions?

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

Defined in: src/config/types.ts:435

Use with caution; ensure you understand the implications.

Inherited from

UserConfig.outputOptions

---

platform?

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

Defined in: src/config/types.ts:208

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

Inherited from

UserConfig.platform

---

plugins?

optional plugins: RolldownPluginOption<any>;

Defined in: src/config/types.ts:330

Inherited from

UserConfig.plugins

---

publicDir?

optional publicDir:
  | CopyOptions
  | CopyOptionsFn;

Defined in: src/config/types.ts:571

Deprecated

Alias for copy, will be removed in the future.

Inherited from

UserConfig.publicDir

---

publint?

optional publint: WithEnabled<PublintOptions>;

Defined in: src/config/types.ts:531

Run publint after bundling. Requires publint to be installed.

Default

false

Inherited from

UserConfig.publint

---

removeNodeProtocol?

optional removeNodeProtocol: boolean;

Defined in: src/config/types.ts:296

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')

Inherited from

UserConfig.removeNodeProtocol

---

report?

optional report: WithEnabled<ReportOptions>;

Defined in: src/config/types.ts:546

Enable size reporting after bundling.

Default

true

Inherited from

UserConfig.report

---

shims?

optional shims: boolean;

Defined in: src/config/types.ts:266

Default

false

Inherited from

UserConfig.shims

---

skipNodeModulesBundle?

optional skipNodeModulesBundle: boolean;

Defined in: src/config/types.ts:192

Deprecated

Use deps.skipNodeModulesBundle instead.

Default

false

Inherited from

UserConfig.skipNodeModulesBundle

---

sourcemap?

optional sourcemap: Sourcemap;

Defined in: src/config/types.ts:378

Whether to generate source map files.

Note that this option will always be true if you have declarationMap option enabled in your tsconfig.json.

Default

false

Inherited from

UserConfig.sourcemap

---

target?

optional target: string | false | string[];

Defined in: src/config/types.ts:239

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. If no engines.node field exists, no syntax transformations are applied.

Accepts a single target (e.g., 'es2020', 'node18'), an array of targets, or false to disable all transformations.

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"] }

// Disable all syntax transformations
{ "target": false }

Inherited from

UserConfig.target

---

treeshake?

optional treeshake: boolean | TreeshakingOptions;

Defined in: src/config/types.ts:273

Configure tree shaking options.

See

https://rolldown.rs/options/treeshake for more details.

Default

true

Inherited from

UserConfig.treeshake

---

tsconfig?

optional tsconfig: string | boolean;

Defined in: src/config/types.ts:195

Inherited from

UserConfig.tsconfig

---

unbundle?

optional unbundle: boolean;

Defined in: src/config/types.ts:398

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

Default

false

Inherited from

UserConfig.unbundle

---

unused?

optional unused: WithEnabled<UnusedOptions>;

Defined in: src/config/types.ts:524

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

Default

false

Inherited from

UserConfig.unused

---

watch?

optional watch: boolean | Arrayable<string>;

Defined in: src/config/types.ts:483

Default

false

Inherited from

UserConfig.watch

---

workspace?

optional workspace: true | Arrayable<string> | Workspace;

Defined in: src/config/types.ts:604

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

Inherited from

UserConfig.workspace

---

write?

optional write: boolean;

Defined in: src/config/types.ts:368

Whether to write the files to disk. This option is incompatible with watch mode.

Default

true

Inherited from

UserConfig.write