• Angular, view encapsulation



    Angular View Encapsulation

    In Angular, view encapsulation is a mechanism that helps to isolate the styles of a component to prevent them from affecting other components in the application. Angular uses a concept called "Shadow DOM" for view encapsulation, but it also provides other strategies. There are three types of view encapsulation in Angular:

    Features Emulated
    This is the default view encapsulation strategy. It emulates the Shadow DOM behavior by adding a unique attribute to the component's elements and styling them using this attribute. The encapsulated styles only affect the component and its children, not the entire application. 
       
    

  import { Component, ViewEncapsulation } from '@angular/core';

@Component({
  selector: 'app-example',
  template: `
    
    This is an example component.
    
  `,
  styles: [`
    p {
      color: red;
    }
  `],
  encapsulation: ViewEncapsulation.Emulated
})
export class ExampleComponent { }
    No view encapsulation is applied. Styles defined in the component are globally available and can potentially affect other components. Use this strategy cautiously, as it can lead to style conflicts. 
       
    

import { Component, ViewEncapsulation } from '@angular/core';

@Component({
  selector: 'app-example',
  template: `
    
    This is an example component.
    
  `,
  styles: [`
    p {
      color: red;
    }
  `],
  encapsulation: ViewEncapsulation.None
})
export class ExampleComponent { }

    In summary, Choose the view encapsulation strategy based on your project's requirements. Generally, the default "Emulated" strategy provides a good balance between encapsulation and browser compatibility.


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