Feature Toggle Package

A lightweight and flexible feature toggle (feature flag) implementation for JavaScript/TypeScript applications.

Installation

``bash
npm install feature-toggle-package
`

Features

- Hierarchical configuration with modules, submodules, and features
- TypeScript support with full type definitions
- Zero dependencies
- Simple and intuitive API

Usage

`typescript
import { FeatureToggle, AppConfig } from 'feature-toggle-package';

const config: AppConfig = {
modules: {
authentication: {
enabled: true,
submodules: {
social: {
enabled: true,
features: {
googleLogin: true,
facebookLogin: false
}
}
}
}
}
};

const featureToggle = new FeatureToggle(config);

// Check if a module is enabled
const isAuthEnabled = featureToggle.isFeatureEnabled('authentication');

// Check if a submodule is enabled
const isSocialEnabled = featureToggle.isFeatureEnabled('authentication', 'social');

// Check if a specific feature is enabled
const isGoogleLoginEnabled = featureToggle.isFeatureEnabled('authentication', 'social', 'googleLogin');
`

Configuration Structure

`typescript
interface AppConfig {
modules: {
[moduleName: string]: {
enabled: boolean;
submodules?: {
[submoduleName: string]: {
enabled: boolean;
features?: {
[featureName: string]: boolean;
};
};
};
};
};
}
``

License

ISC