@featureflip-io/feature-flip-js

✨ Features:

• Local feature flag management
• Undefined feature failover

🔧 Installation

npm i @featureflip-io/feature-flip-js

</> FeatureFlag

{
  id: string; // 123
  token: string; // my-feature
  slug: string; // my-feature-123
  description: string; // My new feature
  enabled: boolean; // on/off switch
}

🌐 Basic usage

import FeatureFlipJS, { FeatureFlag } from '@featureflip-io/feature-flip-js';

const features: FeatureFlag[] = [
  {
    id: '1234',
    token: 'my_feature_123',
    slug: 'my-feature-123',
    enabled: !isProduction,
    description: 'My feature',
  },
]

const featureFlags = new FeatureFlipJS({ features });

const { enabled: myFeatureEnabled } = featureFlags.getFeatureByToken('my-feature');

if (myFeatureEnabled) {
  ...
}

❗Failover

Accessing a feature that is not defined will return a null FeatureFlag with enabled: false

const { enabled: failFeatureEnabled } = featureFlags.getFeatureByToken('fail');
// enabled will be false

💂‍♂️ Accessors

// Returns the feature flags as an object
// where the feature flag token is the object key
featureFlags.getFeaturesMap();

// Access by the id property
featureFlags.getFeatureById('1234');

// Access by the slug property
featureFlags.getFeatureBySlug('my-feature-1234');

// Access by the token property
featureFlags.getFeatureByToken('my-feature');