check-esm

Module to fetch all required and imported modules in Javascript and NodeJS. The module has JS functions to check all imports or required modules and check if the file is a ES Module or a CJS/ JS Module or Script

Find the demos in the demos folder

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``npm install check-esm --save`


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ESM Module

import { _isESCode } from "check-esm";


CommonJS Script/ Module

`
const checkEsm = require("check-esm");
isESCode("./path/to/file.mjs")
``


[Simple Medium blog for usage] (https://medium.com/@ganeshsurfs/exploring-node-js-and-js-checking-is-a-package-is-a-commonjs-script-module-or-a-esm-module-2847c456d93f)


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There are other script APIs you may wish to explore that includes the following:

.checkModuleImports


Check if a module can be imported using import()

Usage:

.checkModuleImports(absPath)

.requiresObject

Check require.cache list in code - used in your code's process global context.

Usage:

.requiresObject()

.requireRegex


Check to see if there are require() syntax in code.

Usage:

.requireRegex(absPath, basePath = "", useProcessCwd = false)

.requireRegex(absPath)

.importRegex


Check to see if there are import() syntax in code.

Usage:

.importRegex(absPath, basePath = "", useProcessCwd = false)

.importRegex(absPath)

.importESRegex


Check to see if there are import x from "" syntax in code.

Usage:

.importESRegex(absPath, basePath = "", useProcessCwd = false)

.importESRegex(absPath)

.importRegexExtended


Check to see if there are import() syntax in code.

Usage:

.importRegexExtended(absPath, basePath = "", useProcessCwd = false)

.importRegexExtended(absPath)

.isESMFileExtension


Check to see if the file has .mjs/ .cjs/ .js extension.

Usage:

.isESMFileExtension(absPath)

.isNodeCompatibleFileExtension


Check to see if the file has .mjs/ .cjs/ .js / .node / .wasm extension.

Usage:

.isNodeCompatibleFileExtension(absPath)

.isESMCodeBase

Check to see if the code is ESM Module.

Usage:

.isESMCodeBase(absPath)

isCJSCodeBase

Check to see if the code is CommonJS Script or Module.

Usage:

isCJSCodeBase(absPath)

isModuleInPackageJson

Checks type key's value in package.json.

Usage:

getPackageJsonRoot(startdirectory, options)

isESCode

Multiple checks to check if the code is ESM Module (other than package.json type key's value check in package.json).

Usage:

isModuleInPackageJson(absPath, packagejsonPath, returns)`

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Contributions, Feature Improvements, Bugs, and Issues are invited. raising an issue

License

MIT License