Creating a global component in Angular 2: A step-by-step guide

Question

Creating a global component in Angular 2: A step-by-step guide

I attempted to create a component with global scope, but encountered an error:

Uncaught Error: Can't export directive LanguageComponent from SharedModule as it was neither declared nor imported!

To address this, I included the component in ShareModule like this:

exports: [
    LoaderComponent,
    LanguageComponent
  ]

I also tried adding the component to core.module as a declaration, but that did not resolve the issue.

ShareModule structure:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { LoaderComponent } from './loader/loader.component';
import {LanguageComponent} from "../language/language.component";
import {HiderPipe} from "../pipes/Hider";

@NgModule({
  imports: [
    CommonModule
  ],
  declarations: [
    LanguageComponent,
    LoaderComponent,
    HiderPipe
  ],
  exports: [
    LoaderComponent,
    LanguageComponent,
    HiderPipe

  ]
})
export class SharedModule { }

This module is only imported in the main core.module like so:

@NgModule({
  imports: [

    SharedModule
  ],

angular typescript

Answer 1

Answer №1

To ensure a component is accessible to the module importing the SharedModule, you must include the LanguageComponent in both the declarations and exports fields of your SharedModule.

@NgModule({
  imports: [
    // ...
  ],
  declarations: [
    // ...
    LanguageComponent
  ],
  exports: [
    // ...
    LanguageComponent
  ]
})
export class SharedModule {
  // ...
}

If you encounter an error indicating that the component was not declared or imported, make sure it is added to the declarations field:

Uncaught Error: Can't export directive LanguageComponent from SharedModule as it was neither declared nor imported

If the LanguageComponent is part of another module (e.g., LanguageModule), import that module and reexport it if needed.

To use the component in a different module, such as AppModule, add the SharedModule to the imports array of that module.

@NgModule({
  imports: [
    // ...
    SharedModule
  ],
  declarations: [
    // ...
  ],
  exports: [
    // ...
  ]
})
export class AppModule {
  // ...
}

Then, utilize the component in your template using its selector. For more information, refer to the Feature Module section in the documentation.

Answer 2

To ensure a component is accessible to the module importing the SharedModule, you must include the LanguageComponent in both the declarations and exports fields of your SharedModule.

@NgModule({
  imports: [
    // ...
  ],
  declarations: [
    // ...
    LanguageComponent
  ],
  exports: [
    // ...
    LanguageComponent
  ]
})
export class SharedModule {
  // ...
}

If you encounter an error indicating that the component was not declared or imported, make sure it is added to the declarations field:

Uncaught Error: Can't export directive LanguageComponent from SharedModule as it was neither declared nor imported

If the LanguageComponent is part of another module (e.g., LanguageModule), import that module and reexport it if needed.

To use the component in a different module, such as AppModule, add the SharedModule to the imports array of that module.

@NgModule({
  imports: [
    // ...
    SharedModule
  ],
  declarations: [
    // ...
  ],
  exports: [
    // ...
  ]
})
export class AppModule {
  // ...
}

Then, utilize the component in your template using its selector. For more information, refer to the Feature Module section in the documentation.

Answer 3

Answer №2

Another key step is incorporating the declarations array.

declarations:[LanguageComponent]

Answer 4

Another key step is incorporating the declarations array.

declarations:[LanguageComponent]

Creating a global component in Angular 2: A step-by-step guide

Answer №1

Answer №2

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