Set up Node.js (client-side) SDK

Install and initialize the LaunchDarkly Node.js (client-side) SDK

Install the package

  yarn add launchdarkly-node-client-sdk

Initialize the SDK

import * as LaunchDarkly from 'launchdarkly-node-client-sdk';

// A "context" is a data object representing users, devices, organizations, and other entities.
const context = {
  kind: 'user',
  key: 'EXAMPLE_CONTEXT_KEY',
};

const client = LaunchDarkly.initialize('YOUR_CLIENT_SIDE_ID', context);

try {
  await client.waitForInitialization(5);
  // Initialization succeeded
} catch (err) {
  // Initialization failed or did not complete before timeout
}

Finding your SDK credentials

You can find your server-side SDK key, client-side ID, and mobile key in the “Resources” section of the help menu. Click the help icon at the bottom left corner of the LaunchDarkly UI, then choose SDK keys:

To learn more, read Initialize the client in the Node.js (client-side) SDK reference guide.