Reference
RouterInstrumentation
Registers optional hooks for app-router request, middleware, and route instrumentation.
Signature
interface RouterInstrumentationMembers
onLoaderEnd?: (event: RouterRouteEndInstrumentationEvent): void | Promise<void>onLoaderStart?: (event: RouterRouteInstrumentationEvent): void | Promise<void>onMiddlewareEnd?: (event: RouterMiddlewareEndInstrumentationEvent): void | Promise<void>onMiddlewareStart?: (event: RouterMiddlewareInstrumentationEvent): void | Promise<void>onRequestEnd?: (event: RouterRequestEndInstrumentationEvent): void | Promise<void>onRequestStart?: (event: RouterRequestInstrumentationEvent): void | Promise<void>