theme spinner

src/app/theme/theme.spinner.ts

@@ -0,0 +1,22 @@
+import {Injectable} from '@angular/core';
+
+@Injectable()
+export class BaThemeSpinner {
+
+  private _selector:string = 'preloader';
+  private _element:HTMLElement;
+
+  constructor() {
+    this._element = document.getElementById(this._selector);
+  }
+
+  public show():void {
+    this._element.style['display'] = 'block';
+  }
+
+  public hide(delay:number = 0):void {
+    setTimeout(() => {
+      this._element.style['display'] = 'none';
+    }, delay);
+  }
+}