| Class | Description |
|---|---|
| [Application](./core.application.md) | Application is the container for various types of artifacts, such as components, servers, controllers, repositories, datasources, connectors, and models. |
| [LifeCycleObserverRegistry](./core.lifecycleobserverregistry.md) | A context-based registry for life cycle observers |
| Function | Description |
|---|---|
| [addExtension(context, extensionPointName, extensionClass, options)](./core.addextension.md) | Register an extension for the given extension point to the context |
| [asLifeCycleObserver(binding)](./core.aslifecycleobserver.md) | A `BindingTemplate` function to configure the binding as life cycle observer by tagging it with `CoreTags.LIFE_CYCLE_OBSERVER`. |
| [asService(serviceInterface)](./core.asservice.md) | Create a binding template for a service interface |
| [createServiceBinding(cls, options)](./core.createservicebinding.md) | Create a service binding from a class or provider |
| [extensionFilter(extensionPointNames)](./core.extensionfilter.md) | A factory function to create binding filter for extensions of a named extension point |
| [extensionFor(extensionPointNames)](./core.extensionfor.md) | A factory function to create binding template for extensions of the given extension point |
| [extensionPoint(name, specs)](./core.extensionpoint.md) | Decorate a class as a named extension point. If the decoration is not present, the name of the class will be used. |
| [extensions(extensionPointName, metadata)](./core.extensions.md) | Shortcut to inject extensions for the given extension point. |
| [filterByServiceInterface(serviceInterface)](./core.filterbyserviceinterface.md) | Create a binding filter by service class |
| [isLifeCycleObserver(obj)](./core.islifecycleobserver.md) | Test if an object implements LifeCycleObserver |
| [isLifeCycleObserverClass(ctor)](./core.islifecycleobserverclass.md) | Test if a class implements LifeCycleObserver |
| [lifeCycleObserver(group, specs)](./core.lifecycleobserver.md) | Sugar decorator to mark a class as life cycle observer |
| [mountComponent(app, component)](./core.mountcomponent.md) | Mount a component to an Application. |
| [service(serviceInterface, metadata)](./core.service.md) | `@service` injects a service instance that matches the class or interface. |
| Interface | Description |
|---|---|
| [ApplicationConfig](./core.applicationconfig.md) | Configuration for application |
| [ApplicationMetadata](./core.applicationmetadata.md) | Type description for `package.json` |
| [ClassMap](./core.classmap.md) | A map of classes to be bound to a context |
| [Component](./core.component.md) | A component declares a set of artifacts so that they can be contributed to an application as a group |
| [LifeCycleObserver](./core.lifecycleobserver.md) | Observers to handle life cycle init/start/stop events |
| [ProviderMap](./core.providermap.md) | A map of provider classes to be bound to a context |
| [Server](./core.server.md) |
Defines the requirements to implement a Server for LoopBack applications: start() : Promise |
| [ServiceOptions](./core.serviceoptions.md) | Options to register a service binding |
| Namespace | Description |
|---|---|
| [CoreBindings](./core.corebindings.md) | Namespace for core binding keys |
| [CoreTags](./core.coretags.md) | |
| [extensions](./core.extensions.md) |
| Variable | Description |
|---|---|
| [DEFAULT\_ORDERED\_GROUPS](./core.default_ordered_groups.md) | |
| [lifeCycleObserverFilter](./core.lifecycleobserverfilter.md) | Find all life cycle observer bindings. By default, a binding tagged with `CoreTags.LIFE_CYCLE_OBSERVER`. It's used as `BindingFilter`. |
| Type Alias | Description |
|---|---|
| [ControllerClass](./core.controllerclass.md) | |
| [LifeCycleObserverGroup](./core.lifecycleobservergroup.md) | A group of life cycle observers |
| [LifeCycleObserverOptions](./core.lifecycleobserveroptions.md) | |
| [MixinTarget](./core.mixintarget.md) | A replacement for `typeof Target` to be used in mixin class definitions. This is a workaround for TypeScript limitation described in - https://github.com/microsoft/TypeScript/issues/17293 - https://github.com/microsoft/TypeScript/issues/17744 - https://github.com/microsoft/TypeScript/issues/36060 |
| [ServiceInterface](./core.serviceinterface.md) | Representing an interface for services. In TypeScript, the `interface` does not have reflections at runtime. We use a string, a symbol or a Function as the type for the service interface. |
| [ServiceOrProviderClass](./core.serviceorproviderclass.md) | |
| [ShutdownOptions](./core.shutdownoptions.md) | Options to set up application shutdown |