[Angular 2] 6. Factory Provider

In this lesson, we discuss how and if to use factory providers, to enable dependencies that shouldn ' t is available to an Gular ' s DI.

If you have the This service:

class Loggerprovider {    Constructor (Enabled:boolean) {        if(enabled) {            Console.log ( " Logger is enabled " )        }    }}

which requires you provide Param in constructor function.

If you just the it like normal provider:

@Component ({   'todos',   providers: [Todoservice, Loggerprovider],   Template: ' ... '  })

It won't work, because when init the Loggerprovider instance, we need to pass a Boolean value as a param.

But you can use the factory provider for this:

providers: [    todoservice   , {        = =             {returnnew Loggerprovider (true)        }    }],    

[Angular 2] 6. Factory Provider