`node:module` API

Added in: v12.20.0

Added in: v0.3.7

The Module object

• Object

Provides general utility methods when interacting with instances of Module, the module variable often seen in CommonJS modules. Accessed via import 'node:module' or require('node:module').

M module.builtinModules

Added in: v9.3.0, v8.10.0, v6.13.0

• string[]

A list of the names of all modules provided by Node.js. Can be used to verify if a module is maintained by a third party or not.

module in this context isn't the same object that's provided by the module wrapper. To access it, require the Module module:

MJScopy

CJScopy

M module.createRequire(filename)

Added in: v12.2.0

• filename string | URL Filename to be used to construct the require function. Must be a file URL object, file URL string, or absolute path string.
• Returns: require Require function

MJScopy

M module.isBuiltin(moduleName)

Added in: v18.6.0, v16.17.0

• moduleName string name of the module
• Returns: boolean returns true if the module is builtin else returns false

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M module.syncBuiltinESMExports()

Added in: v12.12.0

The module.syncBuiltinESMExports() method updates all the live bindings for builtin ES Modules to match the properties of the CommonJS exports. It does not add or remove exported names from the ES Modules.

JScopy

Source map v3 support

Added in: v13.7.0, v12.17.0

Helpers for interacting with the source map cache. This cache is populated when source map parsing is enabled and source map include directives are found in a modules' footer.

To enable source map parsing, Node.js must be run with the flag --enable-source-maps, or with code coverage enabled by setting NODE_V8_COVERAGE=dir.

MJScopy

CJScopy

M module.findSourceMap(path)

Added in: v13.7.0, v12.17.0

• path string
• Returns: module.SourceMap | undefined Returns module.SourceMap if a source map is found, undefined otherwise.

path is the resolved path for the file for which a corresponding source map should be fetched.

C module.SourceMap

Added in: v13.7.0, v12.17.0

M new SourceMap(payload)

• payload Object

Creates a new sourceMap instance.

payload is an object with keys matching the Source map v3 format:

• file: string
• version: number
• sources: string[]
• sourcesContent: string[]
• names: string[]
• mappings: string
• sourceRoot: string

M sourceMap.payload

• Returns: Object

Getter for the payload used to construct the SourceMap instance.

M sourceMap.findEntry(lineNumber, columnNumber)

• lineNumber number
• columnNumber number
• Returns: Object

Given a line number and column number in the generated source file, returns an object representing the position in the original file. The object returned consists of the following keys:

• generatedLine: number
• generatedColumn: number
• originalSource: string
• originalLine: number
• originalColumn: number
• name: string