is-main-module

Problem description

The standard way to detect whether NodeJS module was called directly (via CLI) or required by another module is to use module === require.main. When using Webpack both that objects do not refer to the original objects module and require.main provided by NodeJS, as we expect by default. See this issue

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How to use

1. npm i --save is-main-module
2. Make sure you have set externals: [nodeExternals()] in your Webpack config.
3. Check if your module is required by another one with !isMain(). In addition you can get refs to this module and require.main

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Example

const thisModule = require('is-main-module');

const isThisModuleRequired = thisModule.!isMain();
const isThisModuleMain = thisModule.isMain();
const refToThisModule = thisModule.moduleRef;
const refToMainModule = thisModule.mainRef;