Same Code in Multiple Components Angular 6

Same Code in Multiple Components Angular 6

In Angular 6, you can create reusable components by creating a base component and then extending it in other components. Here's how you can achieve this:

  1. Create a Base Component:

    // base-component.ts import { Component, Input } from '@angular/core'; @Component({ template: '' }) export class BaseComponent { @Input() inputValue: string; }

  2. Extend the Base Component:

    // my-component1.ts import { Component } from '@angular/core'; import { BaseComponent } from './base-component'; @Component({ selector: 'app-my-component1', templateUrl: './my-component1.html' }) export class MyComponent1 extends BaseComponent { // Add any additional functionality specific to MyComponent1 } 
    <!-- my-component1.html --> <div>{{ inputValue }}</div> 
    // my-component2.ts import { Component } from '@angular/core'; import { BaseComponent } from './base-component'; @Component({ selector: 'app-my-component2', templateUrl: './my-component2.html' }) export class MyComponent2 extends BaseComponent { // Add any additional functionality specific to MyComponent2 } 
    <!-- my-component2.html --> <input [(ngModel)]="inputValue" />

  3. Use the Components:

    You can now use app-my-component1 and app-my-component2 in your templates as usual.

    <!-- parent-component.html --> <app-my-component1 [inputValue]="'Value for Component 1'"></app-my-component1> <app-my-component2 [inputValue]="'Value for Component 2'"></app-my-component2>

In this setup:

  • BaseComponent defines a common property inputValue that can be shared among multiple components.
  • MyComponent1 and MyComponent2 extend BaseComponent and inherit the inputValue property.
  • Each component can have its own template and additional functionality specific to that component while still sharing the common functionality provided by BaseComponent.

Examples

  1. Angular 6 share code between components

    • Description: Developers often need to reuse code across multiple Angular components. One approach is to create a shared service to encapsulate the common functionality.
    // shared.service.ts import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SharedService { commonFunctionality() { // Code to be shared across components } }

    This service can then be injected into any component where the shared functionality is required.

  2. Angular 6 reuse code in multiple components

    • Description: Reusing code in multiple Angular components can be achieved by creating a shared module that exports the common functionality.
    // shared.module.ts import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { SharedModule } from '../shared/shared.module'; @NgModule({ declarations: [], imports: [ CommonModule, ], exports: [SharedModule] }) export class SharedModule { }

    Components requiring the shared functionality can import and use the SharedModule.

  3. Angular 6 same code in different components

    • Description: Angular provides various mechanisms for sharing code between components, including services, shared modules, and component inheritance.
    // base.component.ts export class BaseComponent { commonFunctionality() { // Shared code } } 
    // child.component.ts import { BaseComponent } from '../base/base.component'; @Component({ // Component decorator }) export class ChildComponent extends BaseComponent { // Component-specific code }

    In this example, BaseComponent contains the shared code, and ChildComponent inherits from BaseComponent.

  4. Angular 6 sharing code between components best practices

    • Description: When sharing code between Angular components, it's essential to follow best practices to maintain code cleanliness and modularity.
    // 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 { }

    Define shared components within a SharedModule and import this module wherever the shared functionality is required.

  5. Angular 6 reuse component logic

    • Description: To reuse component logic in Angular 6, consider extracting common functionality into a service and injecting it into multiple components.
    // shared.service.ts import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SharedService { commonFunctionality() { // Shared logic } }

    Components can then use methods from SharedService to access the shared functionality.

  6. Angular 6 share code between sibling components

    • Description: Sharing code between sibling components in Angular 6 can be achieved by creating a shared service that holds the common functionality.
    // shared.service.ts import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SharedService { sharedData: any; }

    Both sibling components can inject SharedService to access and modify shared data or functionality.

  7. Angular 6 extend component functionality

    • Description: Extending component functionality in Angular 6 can be done by creating a base component with shared functionality and inheriting from it.
    // base.component.ts export class BaseComponent { commonFunctionality() { // Shared functionality } } 
    // child.component.ts import { BaseComponent } from './base.component'; @Component({ // Component decorator }) export class ChildComponent extends BaseComponent { // Additional functionality }

    ChildComponent extends BaseComponent to inherit its functionality while adding component-specific logic.

  8. Angular 6 multiple components same logic

    • Description: When multiple Angular components require the same logic, consider creating a shared service to encapsulate the common functionality.
    // shared.service.ts import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SharedService { commonFunctionality() { // Shared logic } }

    This service can then be injected into any component requiring the shared functionality.

  9. Angular 6 code reuse between parent and child components

    • Description: Reusing code between parent and child components in Angular 6 can be achieved by extracting the common functionality into a service.
    // shared.service.ts import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SharedService { commonFunctionality() { // Shared logic } }

    Both parent and child components can inject SharedService to access the shared functionality.

  10. Angular 6 sharing state between components

    • Description: Sharing state between components in Angular 6 can be accomplished using services or shared observables.
    // shared.service.ts import { Injectable } from '@angular/core'; import { BehaviorSubject } from 'rxjs'; @Injectable({ providedIn: 'root' }) export class SharedService { private sharedData = new BehaviorSubject<any>(null); sharedData$ = this.sharedData.asObservable(); updateData(data: any) { this.sharedData.next(data); } }

    Components can subscribe to sharedData$ to receive updates and use updateData() to modify the shared state.

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