# OpenTelemetry for SvelteKit

Instrument your SvelteKit applications with OpenTelemetry using the the Baselime Node.js OpenTelemetry SDK and the SvelteKit OpenTelemetry Middleware.

If you deploy your SvelteKit applications on Vercel, install the Vercel Baselime Integration to enable logs in addition to distributed tracing.

# Instrumentation

Check out a complete example in our GitHub Examples Repo.

# Step 1: Install the SDK

Install @baselime/node-opentelemetry in your project.

 terminal
npm i @baselime/node-opentelemetry @baselime/sveltekit-opentelemetry-middleware

# Step 2: Initialise the tracer

Create a file instrumentation.ts in the root of your project and add the following code to configure and initialize OpenTelemetry.

 instrumentation.ts
import { withOpenTelemetry } from '@baselime/sveltekit-opentelemetry-middleware'
import { BaselimeSDK } from '@baselime/node-opentelemetry';

new BaselimeSDK({}).start();

export const handle = withOpenTelemetry(async ({ event, resolve }) => resolve(event));

If you use a /src folder your project, add the instrumentation.ts file in the /src folder instead of the root folder.

# Step 3: Set the Baselime environment variables

Set the BASELIME_KEY environment variable to your Baselime public API Key. Get your pulic API key from the Baselime console.