What is the purpose of the forRoot() and forChild() methods in Angular?

• Used mainly by feature modules that provide services and routes.
• forRoot() configures and provides singleton services for the app. Usually called

in the root module.

• forChild() configures child routes without providing new service instances.

Example:

RouterModule.forRoot(routes) // for root app routing

RouterModule.forChild(childRoutes) // for feature module routing