Angular 2 - How do I conditionally add styles to my component?

Question

I have a component with a stylesheet that loads correctly like this:

@Component({
  selector: \'open-account\',
  styleUrls: [\'open-account.component.scss\'         


        

Answer 1

 import { Component, Inject } from '@angular/core';
 import { DOCUMENT } from '@angular/platform-browser';

 @Component({
 })

 export class SomeComponent {

    constructor (@Inject(DOCUMENT) private document) { }

        LightTheme() {
            this.document.getElementById('theme').setAttribute('href', 'light-theme.css');


        DarkTheme() {
            this.document.getElementById('theme').setAttribute('href', 'dark-theme.css');
    }
}