Minor fixes

src/Squidex/app/framework/angular/cloak.directive.spec.ts

@@ -12,16 +12,20 @@ describe('CloakDirective', () => {
         let called = false;
 
         const element = {
-            nativeElement: {
-                classList: {
-                    remove: () => {
+            nativeElement: {}
+        };
+
+        const renderer = {
+            setElementClass: (target: any, className: string, isAdd: boolean) => {
                 called = true;
-                    }
-                }
+
+                expect(target).toBe(element.nativeElement);
+                expect(className).toBe('sqx-cloak');
+                expect(isAdd).toBeFalsy();
             }
         };
 
-        new CloakDirective(element).ngOnInit();
+        new CloakDirective(<any>element, <any>renderer).ngOnInit();
 
         expect(called).toBeTruthy();
     });

src/Squidex/app/framework/angular/cloak.directive.ts

@@ -5,18 +5,19 @@
  * Copyright (c) Sebastian Stehle. All rights reserved
  */
 
-import { Directive, ElementRef, OnInit } from '@angular/core';
+import { Directive, ElementRef, OnInit, Renderer } from '@angular/core';
 
 @Directive({
     selector: '.sqx-cloak'
 })
 export class CloakDirective implements OnInit {
     constructor(
-        private readonly element: ElementRef
+        private readonly element: ElementRef,
+        private readonly renderer: Renderer
     ) {
     }
 
     public ngOnInit() {
-        this.element.nativeElement.classList.remove('sqx-cloak');
+        this.renderer.setElementClass(this.element.nativeElement, 'sqx-cloak', false);
     }
 }