Installation

There are several ways to install the ExtensionLogin SDK in your Chrome extension.

NPM (Recommended)

The recommended way to install ExtensionLogin is via npm:

npm install extensionlogin

Then import it in your JavaScript:

import ExtensionLogin from 'extensionlogin';

With a Bundler

If you're using a bundler like Webpack, Rollup, or Vite:

// ES Modules
import ExtensionLogin from 'extensionlogin';

// CommonJS
const ExtensionLogin = require('extensionlogin');

CDN

You can also load ExtensionLogin from a CDN:

<script src="https://cdn.jsdelivr.net/npm/extensionlogin@latest/dist/extensionlogin.min.js"></script>

When loaded via CDN, ExtensionLogin is available as a global:

window.ExtensionLogin.init({ apiKey: 'el_live_xxx' });

Specific Version

For production, pin to a specific version:

<script src="https://cdn.jsdelivr.net/npm/extensionlogin@1.0.0/dist/extensionlogin.min.js"></script>

Manual Download

1. Download the latest release from GitHub
2. Copy extensionlogin.min.js to your extension directory
3. Include it in your HTML:

<script src="extensionlogin.min.js"></script>

Manifest V3 Configuration

Add the required permissions to your manifest.json:

{
  "manifest_version": 3,
  "name": "Your Extension",
  "version": "1.0.0",

  "host_permissions": [
    "https://api.extensionlogin.com/*"
  ],

  "permissions": [
    "storage"
  ]
}

Required Permissions

Permission	Purpose
host_permissions for api.extensionlogin.com	API communication
storage	Storing user session data locally

Optional Permissions

Permission	Purpose
identity	Required for Google OAuth integration

TypeScript Support

ExtensionLogin includes TypeScript definitions. No additional packages needed:

import ExtensionLogin from 'extensionlogin';
import type { User, IdentifyResult, InitOptions } from 'extensionlogin';

const options: InitOptions = {
  apiKey: 'el_live_xxx'
};

ExtensionLogin.init(options);

const result: IdentifyResult = await ExtensionLogin.identify({
  email: 'user@example.com'
});

Bundle Size

ExtensionLogin is designed to be lightweight:

File	Size	Gzipped
extensionlogin.min.js	~25KB	~8KB
extensionlogin.esm.js	~28KB	~9KB

Browser Support

ExtensionLogin works in all Chromium-based browsers:

• Chrome 88+
• Edge 88+
• Brave
• Opera
• Vivaldi

Manifest V2 Support

While we recommend Manifest V3, ExtensionLogin also works with Manifest V2 extensions. The same SDK works for both.

Verifying Installation

After installation, verify everything is working:

import ExtensionLogin from 'extensionlogin';

console.log('ExtensionLogin loaded:', typeof ExtensionLogin);
// Should output: "ExtensionLogin loaded: object"

ExtensionLogin.init({
  apiKey: 'el_live_xxx',
  debug: true // Enable debug logging
});
// Should see initialization message in console

Next Steps

• Configuration - Configure SDK options
• Quick Start - Build your first integration