express-flags is a small plugin that provides a cascading feature flag implementation for Express.

You initialise it with a set of base flags (from a json file or similar)

You can then override the base flags with flags in:

• ENV variables
• Cookies

Installation

$ npm install express-flags

Usage

const expressFlags = require('express-flags')
const baseFlags = require('your-flags.json')
const featureFlags = expressFlags({
  env: /^FLAG_/,
  cookies: /^FLAG_/,
  flags: baseFlags
})

app.use(featureFLags)

Running tests

Install dependencies:

$ npm install

Run tests:

$ npm test

License

MIT