Generic type ‘modulewithproviders‘ requires 1 type argument(s).

In Angular, the ModuleWithProviders is an interface that is used to define a module with providers. It is commonly used when creating feature modules or modules that provide services.

The error occurs when the ModuleWithProviders interface is used without specifying the required type argument. The type argument is used to define the providers that the module will provide.

Here is an example to illustrate the issue:

“`typescript
import { NgModule } from ‘@angular/core’;
import { ModuleWithProviders } from ‘@angular/core’;

import { MyService } from ‘./my-service’;

// Incorrect usage of ModuleWithProviders
@NgModule({
providers: [
MyService
]
})
export class MyModule {
static forRoot(): ModuleWithProviders {
return {
ngModule: MyModule,
providers: [
MyService
]
};
}
}
“`

In the above example, the MyModule class uses the ModuleWithProviders interface to define the module with providers. However, it fails to specify the required type argument.

To fix this error, you need to provide the required type argument when defining the ModuleWithProviders. In this case, the type argument should be an object that specifies the providers.

Here is an updated example with the correct usage of ModuleWithProviders:

“`typescript
import { NgModule } from ‘@angular/core’;
import { ModuleWithProviders } from ‘@angular/core’;

import { MyService } from ‘./my-service’;

// Correct usage of ModuleWithProviders
@NgModule({
providers: [
MyService
]
})
export class MyModule {
static forRoot(): ModuleWithProviders {
return {
ngModule: MyModule,
providers: [
MyService
]
};
}
}
“`

In the updated example, the MyModule class specifies the required type argument for the ModuleWithProviders interface by using `ModuleWithProviders`. This indicates that the module will provide the MyModule class as the root module and the MyService as a provider.

By providing the required type argument, the error should be resolved, and the module can be used correctly.