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typed-feature-flagging

v1.1.3

Published

[![NPM Version](https://img.shields.io/npm/v/typed-feature-flagging)](https://www.npmjs.com/package/typed-feature-flagging)

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Links

Git

Maintainers

aren55555aren55555

Keywords

typescript

Readme

typed-feature-flagging

NPM Version

Goals

  • able to substitute drivers
    • ie Unleash, LaunchDarkly, etc.
  • boolean feature flag (true/false) results
    • upstream driver failures will result in false (disabled)
  • exhaustive list of feature flags are defined ahead of time and typed (enums)
  • each feature flag may have a context type
    • if there was a context for the feature flag it MUST BE provided
    • the context is typed on a per feature flag basis (the user of the library must define the mapping of the feature flag name to the type of its value)

Desired API

Without a Context

enabled(FeatureFlag.WITHOUT_CONTEXT): boolean

If the developer had attempted to provide a context, there should have been a TS lint error indicating that the context value was not needed.

With a Context

enabled(FeatureFlag.WITH_CONTEXT, { ... }): boolean

If the developer had attempted to NOT provide a context, there should have been a TS lint error indicating that the context value was mandatory.