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Version: Config V1 (legacy)

Getting Started

This page is an overview and a short guide on how to get started.

ConfigCat is a cloud-based service that lets you release features without code deployments.

You can use it with many similar techniques such as feature flags/toggles, canary releases, soft launches, A-B testing, remote configuration management, and phased rollouts. Configure your application and features even after deployment.

The birth of a Feature Flag

First, add a feature flag on the ConfigCat Dashboard, then you can connect your application to the ConfigCat service to access your feature flag.

Create a feature flag on the ConfigCat Dashboard

  1. Log in to the Dashboard
  2. Click ADD FEATURE FLAG and give it a name.

Connect your application

There are ready to use code snippets for .NET, Java, Android (Java), Kotlin, iOS (Swift), Dart (Flutter), Node, JavaScript, React, Python, Go, PHP, Ruby, Elixir, C++ on the ConfigCat Dashboard, just scroll down to the SDK Key and steps to connect your application section.

All the ConfigCat SDKs are open-source and available on GitHub.

See the detailed Docs on how to use the ConfigCat SDKs.

Here's a short example to demonstrate the concept:

// 0. If necessary, install the ConfigCat SDK package for the platform you use.
// E.g. `npm install configcat-js`

// 1. Import the ConfigCat SDK package.
import * as configcat from 'configcat-js';

// 2. Get a client object for the SDK Key of your config.
const client = configcat.getClient('YOUR SDK KEY HERE');

// 3. Evaluate a feature flag using the client object.
const value = await client.getValueAsync('isMyFeatureEnabled', false);

// 4. Based on the value of the feature flag decide whether or not to enable the related feature.
if (value) {
} else {