Featurevisor is a solution for managing your feature flags, experiments, and remote config declaratively via a Git repository.

Workflow can be broken down into 3 steps:

• 1️⃣ Manage feature flags, experiments, and remote config in your Git repository
• 2️⃣ Trigger CI/CD pipeline to generate and upload datafiles (static JSON files) to your CDN
• 3️⃣ Fetch and evaluate datafiles in your applications using Featurevisor SDKs

More documentation available at https://featurevisor.com.

Supported features:

• 🚩 Feature flags: classic on/off switches
• 🆎 Experimentation: a/b and multivariate tests
• 👥 Segmentation: reusable conditions for targeting groups of users
• ↗️ Gradual rollouts: avoid big bang releases, and go from 0% to 100% rollout gradually
• 🔧 Variables: store key/value pairs for remote config namespaced under each feature
• 🎯 Consistent bucketing: makes sure same user gets same variation across devices/sessions
• 🌏 Multiple environments: Go beyond just staging and production to fit your needs
• 🏷️ Tagging: Load only features relevant to your application, avoiding bloat
• 👁️ Tracking: Track experiment activations with your favourite analytics tool

SDK support:

• JavaScript (both Node.js and browser environments)
• Go
• PHP
• Ruby
• Java
• Swift
• React
• React Native
• Next.js
• Vue.js

You are recommended to see a more detailed quick start guide here: https://featurevisor.com/docs/quick-start/.

The whole process can be broken down into 3 steps:

Use npx to scaffold a new Featurevisor project:

$ mkdir my-featurevisor-project && cd my-featurevisor-project

$ npx @featurevisor/cli init
$ npm install

You can now create and manage your feature flags, experiments, and remote config in this directory expressed as YAMLs.

See the building block guides here:

• Attributes: building block for conditions
• Segments: conditions for targeting users
• Features: feature flags and variables with rollout rules

Once the project is initialized, you can build your datafiles (JSON files containing configuration of your feature flags):

$ npx featurevisor build

You will find the output in datafiles directory, that you can upload to your CDN.

See further guides here:

• Building datafiles: how to build datafiles
• Deploying datafiles: how to deploy datafiles to your CDN

A fully functioning example for deploying with Cloudflare and GitHub Actions (for free) is available here.

You can now consume the datafiles from your CDN in your applications directly using Featurevisor SDKs.

For Node.js and browser environments, install the JavaScript SDK:

$ npm install --save @featurevisor/sdk

Now you can initialize the SDK with the URL of your datafile, and evaluate your feature flags:

import { createInstance } from "@featurevisor/sdk";

// fetch datafile
const DATAFILE_URL = "https://cdn.yoursite.com/datafile.json";
const datafileContent = await fetch(DATAFILE_URL)
  .then((res) => res.json());

// initialize the SDK
const f = createInstance({
  datafile: datafileContent,
});

// set user context
f.setContext({
  appVersion: "1.0.0",
  userId: "user-123",
  country: "nl",
});

// evaluate values
const isEnabled = f.isEnabled("myFeatureKey");
const variation = f.getVariation("myFeatureKey");
const variable  = f.getVariable("myFeatureKey", "someVariableKey");

Learn more about SDK usage here: https://featurevisor.com/docs/sdks/javascript/.

Package	Version	Description
@featurevisor/cli		CLI package
@featurevisor/core		Core package used by CLI
@featurevisor/react		React package
@featurevisor/sdk		Universal SDK for both Node.js and browser
@featurevisor/site		Static site generator for your project
@featurevisor/types		Common typings
@featurevisor/vue		Vue.js package

MIT © Fahad Heylaal