sourcemapIgnoreList

• Type: boolean | string | RegExp | ((relativeSourcePath, sourcemapPath) => boolean)
• Optional

Defined in: packages/rolldown/src/options/output-options.ts:273

Control which source files are included in the sourcemap ignore list.

Files in the ignore list are excluded from debugger stepping and error stack traces.

• false: Include no source files in the ignore list
• true: Include all source files in the ignore list
• string: Files containing this string in their path will be included in the ignore list
• RegExp: Files matching this regular expression will be included in the ignore list
• function: Custom function to determine if a source should be ignored

Performance

Using static values (boolean, string, or RegExp) is significantly more performant than functions. Calling JavaScript functions from Rust has extremely high overhead, so prefer static patterns when possible.

Union Members

boolean

---

string | RegExp

---

Function

(relativeSourcePath, sourcemapPath) => boolean

Parameters

relativeSourcePath

string

The relative path from the generated .map file to the corresponding source file.

sourcemapPath

string

The fully resolved path of the generated sourcemap file.

Returns

boolean

Example

// ✅ Preferred: Use RegExp for better performance
sourcemapIgnoreList: /node_modules/

// ✅ Preferred: Use string pattern for better performance
sourcemapIgnoreList: "vendor"

// ! Use sparingly: Function calls have high overhead
sourcemapIgnoreList: (source, sourcemapPath) => {
  return source.includes('node_modules') || source.includes('.min.');
}

Default

/node_modules/