configcat-common

What is configcat-common?

The configcat-common npm package is a client library for ConfigCat, a feature flag and configuration management service. It allows developers to manage feature flags and remote configurations in their applications, enabling them to toggle features on and off without deploying new code.

What are configcat-common's main functionalities?

Initialize ConfigCat Client

This feature allows you to initialize the ConfigCat client with your SDK key, which is necessary to interact with the ConfigCat service.

const { createClient } = require('configcat-common');
const client = createClient('YOUR-SDK-KEY');

Get Feature Flag Value

This feature allows you to retrieve the value of a feature flag. The method takes the feature flag key, a default value, and a callback function to handle the retrieved value.

client.getValue('isMyFeatureEnabled', false, (value) => {
  console.log('Feature flag value:', value);
});

Get Configuration Value

This feature allows you to retrieve the value of a configuration setting. Similar to feature flags, it takes the configuration key, a default value, and a callback function.

client.getValue('myConfigKey', 'defaultValue', (value) => {
  console.log('Configuration value:', value);
});

Set User Context

This feature allows you to set the user context, which can be used to serve different configurations or feature flags based on the user.

const user = { identifier: 'user123', email: '[e-mail]' };
client.setUser(user);

Other packages similar to configcat-common

launchdarkly-node-client-sdk

LaunchDarkly is a feature management platform that allows you to control the release of features to users. It offers similar functionality to ConfigCat, such as feature flag management and user targeting. However, LaunchDarkly is generally considered to be more enterprise-focused with additional features like experimentation and advanced analytics.

unleash-client

Unleash is an open-source feature management solution. It provides similar capabilities for managing feature flags and configurations. Unleash is a good alternative for those looking for an open-source solution with a self-hosted option.

flagr

Flagr is another open-source feature flagging and A/B testing tool. It allows you to create and manage feature flags and perform A/B testing. Flagr is suitable for teams looking for a customizable and self-hosted feature management solution.

README

ConfigCat Common library for JavaScript

ConfigCat Common library for JavaScript is a shared package that provides the common ConfigCat SDK logic for ConfigCat SDK for Node.js and ConfigCat SDK for JavaScript.

ConfigCat is a feature flag, feature toggle, and configuration management service that lets you launch new features and change your software configuration remotely without actually (re)deploying code. ConfigCat even helps you do controlled roll-outs like canary releases and blue-green deployments.

ConfigCat is a hosted feature flag service. Manage feature toggles across frontend, backend, mobile, desktop apps. Alternative to LaunchDarkly. Management app + feature flag SDKs.

Installing

npm install

Running the tests

npm test

Need help?

https://configcat.com/support

Contributing

Contributions are welcome. For more info please read the Contribution Guideline.

About ConfigCat

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