LaunchDarkly sample TypeScript Node.js (server-side) application

We've built a simple console application that demonstrates how LaunchDarkly's SDK works.


Below, you'll find the build procedure. For more comprehensive instructions, you can visit your Quickstart page or the Node.js (server-side) reference guide.

The LaunchDarkly server-side SDK for Node.js is designed primarily for use in multi-user systems such as web servers and applications. It follows the server-side LaunchDarkly model for multi-user contexts. It is not intended for use in desktop and embedded systems applications.

For a sample application demonstrating how to use LaunchDarkly in client-side Node.js applications, refer to our Client-side Node.js SDK sample application.

Build instructions

1. Install the LaunchDarkly Node.js SDK by running npm install
2. Edit index.ts and set the value of sdkKey to your LaunchDarkly SDK key. If there is an existing boolean feature flag in your LaunchDarkly project that you want to evaluate, set featureFlagKey to the flag key.

  const sdkKey = "1234567890abcdef";

  const featureFlagKey = "my-flag";

3. Run npm start