angular - Share a component between two different modules

Angular - Share a component between two different modules

Sharing a component between two different modules in Angular involves a few steps to ensure that the component is correctly imported and accessible in both modules. Here's a detailed guide on how to achieve this:

Scenario

Assume you have two modules: ModuleA and ModuleB, and you want to share a component called SharedComponent between these two modules.

Step-by-Step Guide

1. Create the Shared Component

First, create your shared component using the Angular CLI or manually:

ng generate component shared

2. Export the Shared Component

In the shared.component.ts file, make sure to export the component class:

import { Component } from '@angular/core'; @Component({ selector: 'app-shared', templateUrl: './shared.component.html', styleUrls: ['./shared.component.css'] }) export class SharedComponent { // Component logic here }

3. Import and Declare Shared Component in ModuleA

In moduleA.module.ts, import and declare SharedComponent:

import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedComponent } from '../path-to-shared/shared.component'; @NgModule({ declarations: [ SharedComponent ], imports: [ CommonModule ], exports: [ SharedComponent // Export the component if needed by other modules ] }) export class ModuleA { }

4. Import and Declare Shared Component in ModuleB

Similarly, in moduleB.module.ts, import and declare SharedComponent:

import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedComponent } from '../path-to-shared/shared.component'; @NgModule({ declarations: [ SharedComponent ], imports: [ CommonModule ], exports: [ SharedComponent // Export the component if needed by other modules ] }) export class ModuleB { }

5. Use the Shared Component in Templates

Now, you can use SharedComponent in the templates of components belonging to both ModuleA and ModuleB. For example, in any component template in ModuleA or ModuleB:

<!-- Example usage in ModuleA component template --> <app-shared></app-shared> <!-- Example usage in ModuleB component template --> <app-shared></app-shared>

Explanation

  • Component Declaration: By declaring SharedComponent in both ModuleA and ModuleB, Angular ensures that the component is available for use within the scope of these modules.
  • CommonModule: Importing CommonModule ensures that common directives like ngIf, ngFor, etc., are available.
  • Exports: Use the exports array in the module metadata to make SharedComponent available for use in components of other modules that import ModuleA or ModuleB.

Notes

  • Ensure that the path to SharedComponent is correctly specified in the import statements (../path-to-shared/shared.component).
  • If SharedComponent uses services or other resources, ensure they are correctly provided or imported to avoid duplication or dependency issues.
  • Use Angular's module structure to organize and encapsulate components, services, and other resources effectively.

By following these steps, you can successfully share a component between different modules in Angular, promoting reusability and maintaining modular structure in your application.

Examples

  1. Angular share component between modules stackoverflow

    • Description: Learn how to share a component between two Angular modules using exports and imports.
    • Code Implementation:
      // Module A (e.g., SharedModule) import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedComponent } from './shared.component'; @NgModule({ declarations: [SharedComponent], imports: [CommonModule], exports: [SharedComponent] }) export class SharedModule { }

  2. Angular component reuse between modules

    • Description: Understand how to reuse an Angular component across multiple modules without duplicating code.
    • Code Implementation:
      // Module B import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedModule } from './shared.module'; @NgModule({ imports: [CommonModule, SharedModule], // other declarations and exports }) export class ModuleB { }

  3. Angular import component from another module

    • Description: Find out how to import a component defined in one module into another Angular module.
    • Code Implementation:
      // Module B import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedModule } from './shared.module'; import { SharedComponent } from './shared.component'; @NgModule({ imports: [CommonModule, SharedModule], declarations: [], exports: [SharedComponent] }) export class ModuleB { }

  4. Angular component in multiple modules

    • Description: Discover best practices for using an Angular component across multiple feature modules.
    • Code Implementation:
      // SharedModule (shared.module.ts) import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedComponent } from './shared.component'; @NgModule({ declarations: [SharedComponent], imports: [CommonModule], exports: [SharedComponent] }) export class SharedModule { }

  5. Angular import module into another module

    • Description: Understand how to import an entire Angular module, including its components, into another module.
    • Code Implementation:
      // Module B import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedModule } from './shared.module'; @NgModule({ imports: [CommonModule, SharedModule], // other declarations and exports }) export class ModuleB { }

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