Set fixed values to align variable

Author: jeroni

src/app/components/button/button.ts

@@ -7,7 +7,7 @@ import {CommonModule} from '@angular/common';
 })
 export class ButtonDirective implements AfterViewInit, OnDestroy {
 
-    @Input() iconPos: string = 'left';
+    @Input() iconPos: 'left' | 'right' = 'left';
 
     @Input() cornerStyleClass: string = 'ui-corner-all';