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Home > @loopback/core > Application > interceptor
Application.interceptor() method
Register an interceptor
Signature:
interceptor(interceptor: Interceptor | Constructor<Provider<Interceptor>>, nameOrOptions?: string | InterceptorBindingOptions): Binding<Interceptor>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| interceptor | [Interceptor](/doc/en/lb4/apidocs.context.interceptor.html) \| [Constructor](/doc/en/lb4/apidocs.context.constructor.html)<[Provider](/doc/en/lb4/apidocs.context.provider.html)<[Interceptor](/doc/en/lb4/apidocs.context.interceptor.html)>> | An interceptor function or provider class |
| nameOrOptions | string \| [InterceptorBindingOptions](/doc/en/lb4/apidocs.context.interceptorbindingoptions.html) | _(Optional)_ Binding name or options |
Returns: