babel-plugin-register-universal-module

A babel plugin to register a library on global with universal namespace.

Table of Contents

1. Usage
   1. Options
   2. Output
2. License

Usage

npm i babel-plugin-register-universal-module

// babel.config.js
module.exports = {
  plugins: [
    /*...*/
    [
      'register-universal-module', {
        libName,
        entry,
        prefix,
        version
      }
    ]
  ]
}

View examples for more types of setups.

Options

Name	Required	Type	Default
entry	No	String or Array	src/index.js
libName	No	String or Array	name from package.json
prefix	No	String or Array	undefined
version	No	Boolean	false

entry

This can be a String or an Array. By default it points to src/index.js. When multiple entries are provided, the plugin will try to insert the registration code in all entries. This also extends the existing entry. Try version option to avoid any potential conflicts. See the output sample output for inserted code.

Example 1:

{ "entry": "./index.js" }

Example 2:

{ "entry": [ "./src/entry1.js", "./src/entry2.js" ] }

libName

The namespace under which the module will be registered in global. The global can be either Node global or window of a browser, is available in the scope will be chosen. The libName defaults to the package name. See the output sample output for generated code.

Example 1:

{ "libName": "my.library" }

Example 2:

{ "libName": ["my", "library"] }

prefix

To scope different modules, a prefix can be used. Similar to the libName, this can also be a String or an Array.

For example:

{ "prefix": "my.tools" }

And the library will be available at global.my.tools.my.library.

version

This is a Boolean set to avoid collisions when used in multiple versions of same library. For example, consider following dependency structure:

+ my-project
|
+--+-- dependency1
|  |
|  +-- my.libaray@1.0.0
|
+--+-- dependency2
   |
   +-- my.libarry@2.0.0

When my-project imports dependency1 and dependency2, their transitive dependency my.library can override/extend each other. This may not be a desired outcome. So the version option can be used to scope the exports. The version will be used from package.json.

When set to true, the library will be available at global.my.library['1.0.0']

Output

After babel transpiles the source code down to es5 (or env), this plugin will insert code in the entry file that will make the module available in the global namespace. For example, with following setup,

// package.json
{
  "name": "my-module"
}

// babel.config.js
module.exports = {
  plugins: [
    /*...*/
    'register-universal-module'
  ]
}

// src/index.js
import {MyLibrary} from './my-library';

export const MyLibrary = MyLibrary;

The output will be:

// lib/index.js
"use strict";

var MyLibrary = require("./my-library").MyLibrary;

exports.__esModule = true;
exports.MyLibrary = MyLibrary;

(function(root) {
  root["test"] = root["test"] || {};
  root["test"]["module"] = typeof exports !== 'undefined' ? exports : {};
})(typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : this)

Thus enabling the consuming module to access this from window.my.module.

License

MIT License

Copyright (c) 2019 Gopikrishna Sathyamurthy

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.