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
INSTALL
npm install check-esm --save
USAGE
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)
Package APIs
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)
Contributions
Contributions, Feature Improvements, Bugs, and Issues are invited. raising an issue