Next.js · Senior · Question 19 of 75

What is the `instrumentation.ts` file with a `register()` function for?

✓Correct answer: Running code once on server startup, e.g. to set up OpenTelemetry
2Adding a global click handler to all pages for analytics
3Describing the module build and loading order for Turbopack

Explanation

register is called when a new server instance starts - suitable for initializing tracing, monitoring and logging. onRequestError lets you send server errors to a monitoring system. For the client side there's instrumentation-client.ts.

What is the `instrumentation.ts` file with a `register()` function for?

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What is the instrumentation.ts file with a register() function for?

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What is the `instrumentation.ts` file with a `register()` function for?