Angular 6 References/ Core
References
Oleksa Novyk | GitHub

@HostBinding

This is the documentation for Angular 6.
You can switch to the latest version Angular 10.

Binds a host element property to a directive/component property.

Example

export class MyComponent {
  @HostBinding('class.valid') isValid;
}

Or use getter for binding:

export class MyComponent {
  @HostBinding('class.error') get isError() {
    ...
  }
}
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