Getting Started with the Node SDK

Create the AppFlags Client

To create a new AppFlagsClient:

const {AppFlagsClient} = require("appflags-node");

const appflagsClient = new AppFlagsClient("YOUR_SDK_KEY");

This will return immediately and the client will initialize asynchronously in the background.

caution

You should only create one instance of AppFlagsClient in your application. Creating multiple instances is inefficient and will log warnings in your application.

If you need to get feature flags from multiple AppFlags projects, you can create an AppFlagsClient instance for each project.

Client Initialization

It takes the AppFlags client around 100ms to download your Feature Flag configuration from the AppFlags edge servers and fully initialize. Using the AppFlags client before initialization is complete will result in an error.

The client returns a promise that resolves when initialization is complete. You can get this promise by calling onInitialized.

Using async/await:

await appflagsClient.onInitialized();

Using promises:

appflagsClient.onInitialized().then(() => {
    // the client is initialized and ready to use
});