Inject Style Declarations Using Hostbinding in Angular

You need to pass the same value you would add to an element like <div style="..."> and sanitize the styles

  @HostBinding('style')
  get myStyle(): SafeStyle {
    return this.sanitizer.bypassSecurityTrustStyle('background: red; display: block;');
  }

  constructor(private sanitizer:DomSanitizer) {}

working demo