EZMM

An easy ES Module Manager to use modern javascript.

Table of Content

• Getting Started
  • Prerequisites
  • Installation
  • Usage
• Commands
• Configuration
  • Providers
• License
• Contact

🚀 Getting Started

🏠 Prerequisites

• NodeJS
• NPM or Yarn (or your favorite node package manager)

📦 Installation

The installation is pretty simple, just install the package.

# NPM
npm install [-g] ezmm

# Yarn
yarn [global] add ezmm

🏄 Usage

EZMM is super simple to use, just use the link command to add a module to your modules directory and modules.json file. If the modules directory and the modules.json files do not exist they will be created.

ezmm link react

Then in your javascript you can import linked modules from the modules directory.

import react from 'modules/react.js';

Note: Be sure to link your javascript in your html with type="module".

You can overwrite the provider and/or the version you are using with the link command.

ezmm link react -p esm.sh -t 16.10
# React will now use the version 16.10 provided by esm.sh

Afterward, if you want to remove a module that you don't use anymore, use the unlink command.

ezmm unlink react

Once a module is linked you will see it in the modules.json file that is automatically created on the first link command (given you used the name argument). This file has a simple structure and is made to help with maintenance.

{
  "react": {
    "provider": "skypack",
    "tag": "16.10"
  },
  "darken": {
    "url": "https://unpkg.com/darken@latest/dist/darken.mjs"
  }
}

You can modify everything in this file and use the link command without arguments to update your links.

ezmm link
# Given the example above, 
# will link react 16.10 from skypack and darken from custom url

⌨️ Commands

link [name]

• -p, --provider : Defines the CDN provider. (default: "skypack")
• -u, --url : If used, uses this value as the CDN url.
• -t, --tag : Specifies a version/dist tag to the module (only if the provider is compatible).
• -nc, --no-check : If used, do not check the status of the CDN provider.
• -nd, --no-default : If used do not try to import the export named "default".

The link command will link a module <name> in your modules directory and create an entry for the module in the modules.json file (will create new ones if they do not exist).

# Using the default provider
ezmm link react

# Using a custom CDN url
ezmm link react -u https://unpkg.com/react@16/umd/react.development.js 

You can also use the link command without argument to link all the modules in you modules.json file.

ezmm link

unlink <name>

The unlink command will delete a module <name> of your modules directory.

ezmm unlink react

help [command]

The help command will display the program help or the [command] help if specified.

# Program help
ezmm help

# Link command help
ezmm help link

You can also use the -h or --help option on any command to display the help.

ezmm link -h

⚙️ Configuration

📫 Providers

You can configure the providers of EZMM by editing the provider.json file in the package directory.

The default file will look like this:

{
  "default": "skypack",
  "providers": {
    "skypack": "https://cdn.skypack.dev/%n@%t",
    "jspm": "https://jspm.dev/%n@%t",
    "esm.sh": "https://esm.sh/%n@%t"
  }
}

On any provider you add you will probably need to give the module's name with %n and/or the module's version/dist tag with %t.

Do not hesitate to do a pull request to add providers to ezmm default provider.json.

📜 License

EZMM is distributed under the MIT License. See LICENSE for more information.

✉️ Contact

I am Colin Espinas you can contact me using my

This project source's are at https://github.com/ColinEspinas/ezmm.