Eppo SDK for Dart and Flutter

The Eppo SDK enables feature flags and experiments in your Dart and Flutter applications with only a few lines of code.

The SDK handles all the complexity of feature flag evaluation and experiment assignment locally in your application. The guide below will walk you through installing the SDK and implementing your first feature flag, experiment, and contextual bandit.

See https://docs.geteppo.com/sdks/client-sdks/dart/quickstart/ for detailed usage instructions.

import 'package:eppo/eppo.dart';

// Initialize the SDK
await Eppo.initialize(
  'your-sdk-key',
  SubjectEvaluation(
    subject: Subject(
      subjectKey: 'user-identifier'
    )
  )
);

// Make an assignment
final String variation = Eppo.getStringAssignment(
  'my-neat-feature',
  'default-value',
);

// Render different components based on assignment
switch(variation) {
  case 'landing-page-a':
    return renderLandingPageA();
  case 'landing-page-b':
    return renderLandingPageB();
  default:
    return renderLandingPageC();
}

Installation

Add the following to your pubspec.yaml file:

dependencies:
  eppo: ^1.0.0

Contributing

dart pub get
dart analyze

Running the tests

dart test

Running the benchmarks

The SDK includes a benchmark for evaluating the performance of the SDK when evaluating feature flags.

dart run benchmark/flag_evaluation.dart <sdk-key> <subject-key>

The SDK also includes a benchmark for evaluating the performance of the SDK when fetching configurations.

dart run benchmark/configuration_fetch.dart <sdk-key> <subject-key>

Libraries

eppo