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ViewEncapsulation

enum

Defines template and style encapsulation options available for Component's Component.

enum ViewEncapsulation {
  Emulated: 0
  None: 2
  ShadowDom: 3
}

Description

See encapsulation.

Further information is available in the Usage Notes...

Members

Member Description

Member	Description
`Emulated: 0`	Emulate `Native` scoping of styles by adding an attribute containing surrogate id to the Host Element and pre-processing the style rules provided via styles or styleUrls, and adding the new Host Element attribute to all selectors. This is the default option.
`None: 2`	Don't provide any template or style encapsulation.
`ShadowDom: 3`	Use Shadow DOM to encapsulate styles. For the DOM this means using modern Shadow DOM and creating a ShadowRoot for Component's Host Element.

Emulated: 0

Emulate Native scoping of styles by adding an attribute containing surrogate id to the Host Element and pre-processing the style rules provided via styles or styleUrls, and adding the new Host Element attribute to all selectors.

This is the default option.

None: 2

Don't provide any template or style encapsulation.

ShadowDom: 3

Use Shadow DOM to encapsulate styles.

For the DOM this means using modern Shadow DOM and creating a ShadowRoot for Component's Host Element.

Usage notes

Example

@Component({
  selector: 'app-root',
  template: `
    <h1>Hello World!</h1>
    <span class="red">Shadow DOM Rocks!</span>
  `,
  styles: [`
    :host {
      display: block;
      border: 1px solid black;
    }
    h1 {
      color: blue;
    }
    .red {
      background-color: red;
    }

  `],
  encapsulation: ViewEncapsulation.ShadowDom
})
class MyApp {
}

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Licensed under the Creative Commons Attribution License 4.0.
https://v12.angular.io/api/core/ViewEncapsulation