nativeElement.classList.add() alternative

Question

I\'m trying to create a button component in angular 2. At the host I have to set a dynamically generated css classname. (depending on binded property)

\'[ngClass]\'

Answer 1

Thanks to Günter I've found the solution. This is his code but cleaned for anyone who can use it in the future.

private color_: string;

@Input()
set color(value: string) {
    this.color_ = value;

    this.renderer.setElementClass(this.elementRef, 'md-' + this.color_, true);
}

get color(): string {
    return this.color_;
}

constructor(private elementRef: ElementRef, private renderer: Renderer) { }

Answer 2

@Component({
    selector: '[md-button]' //,
    // host: { '[class]': 'classList()' }
})
export class MdButton {
    color_: string;

    // classList() {
    //  return 'md-' + this.color_;
    // }

    @Input
    set color() {
        this.color_ = value;
        // if (this.elementRef !== undefined) {
        //    this.elementRef.nativeElement.classList.add('md-' + this.color_);
        // }   

        this.renderer.setElementClass(this.elementRef, 'md-' + this.color_, true);
    }

    get color(): string {
        return this.color_;
    }

    constructor(public elementRef: ElementRef, private renderer: Renderer2){}
}