MOBILE-3413 h5p: Fix h5p iframe not visible in offline

Author: dpalou

src/components/iframe/iframe.ts

@@ -75,17 +75,17 @@ export class CoreIframeComponent implements OnInit, OnChanges {
         const navCtrl = this.svComponent ? this.svComponent.getMasterNav() : this.navCtrl;
         this.iframeUtils.treatFrame(iframe, false, navCtrl);
 
-        if (this.loading) {
-            iframe.addEventListener('load', () => {
-                this.loading = false;
-                this.loaded.emit(iframe); // Notify iframe was loaded.
-            });
+        iframe.addEventListener('load', () => {
+            this.loading = false;
+            this.loaded.emit(iframe); // Notify iframe was loaded.
+        });
 
-            iframe.addEventListener('error', () => {
-                this.loading = false;
-                this.domUtils.showErrorModal('core.errorloadingcontent', true);
-            });
+        iframe.addEventListener('error', () => {
+            this.loading = false;
+            this.domUtils.showErrorModal('core.errorloadingcontent', true);
+        });
 
+        if (this.loading) {
             setTimeout(() => {
                 this.loading = false;
             }, this.IFRAME_TIMEOUT);

src/providers/utils/iframe.ts

@@ -55,7 +55,7 @@ export class CoreIframeUtilsProvider {
     checkOnlineFrameInOffline(element: any, isSubframe?: boolean): boolean {
         const src = element.src || element.data;
 
-        if (src && !this.urlUtils.isLocalFileUrl(src) && !this.appProvider.isOnline()) {
+        if (src && src != 'about:blank' && !this.urlUtils.isLocalFileUrl(src) && !this.appProvider.isOnline()) {
             if (element.classList.contains('core-iframe-offline-disabled')) {
                 // Iframe already hidden, stop.
                 return true;