diff --git a/src/core/siteplugins/classes/call-ws-click-directive.ts b/src/core/siteplugins/classes/call-ws-click-directive.ts
index 7f535eaad..c6c598b53 100644
--- a/src/core/siteplugins/classes/call-ws-click-directive.ts
+++ b/src/core/siteplugins/classes/call-ws-click-directive.ts
@@ -15,6 +15,7 @@
 import { Input, OnInit, ElementRef } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
+import { CoreUtilsProvider } from '@providers/utils/utils';
 import { CoreSitePluginsProvider } from '../providers/siteplugins';
 import { CoreSitePluginsPluginContentComponent } from '../components/plugin-content/plugin-content';
 import { CoreSitePluginsCallWSBaseDirective } from './call-ws-directive';
@@ -28,10 +29,11 @@ import { CoreSitePluginsCallWSBaseDirective } from './call-ws-directive';
  */
 export class CoreSitePluginsCallWSOnClickBaseDirective extends CoreSitePluginsCallWSBaseDirective implements OnInit {
     @Input() confirmMessage: string; // Message to confirm the action. If not supplied, no confirmation. If empty, default message.
+    @Input() showError: boolean | string; // Whether to show an error message if the WS call fails. Defaults to true.
 
     constructor(element: ElementRef, protected translate: TranslateService, protected domUtils: CoreDomUtilsProvider,
             protected sitePluginsProvider: CoreSitePluginsProvider,
-            protected parentContent: CoreSitePluginsPluginContentComponent) {
+            protected parentContent: CoreSitePluginsPluginContentComponent, protected utils: CoreUtilsProvider) {
         super(element, translate, domUtils, sitePluginsProvider, parentContent);
     }
 
@@ -66,7 +68,11 @@ export class CoreSitePluginsCallWSOnClickBaseDirective extends CoreSitePluginsCa
     protected callWS(): Promise<any> {
         const modal = this.domUtils.showModalLoading();
 
-        return super.callWS().finally(() => {
+        return super.callWS().catch((error) => {
+            if (typeof this.showError == 'undefined' || this.utils.isTrueOrOne(this.showError)) {
+                this.domUtils.showErrorModalDefault(error, 'core.serverconnection', true);
+            }
+        }).finally(() => {
             modal.dismiss();
         });
     }
diff --git a/src/core/siteplugins/classes/call-ws-directive.ts b/src/core/siteplugins/classes/call-ws-directive.ts
index 8d7dedc4b..8716afdd0 100644
--- a/src/core/siteplugins/classes/call-ws-directive.ts
+++ b/src/core/siteplugins/classes/call-ws-directive.ts
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Input, OnInit, OnDestroy, ElementRef } from '@angular/core';
+import { Input, OnInit, OnDestroy, ElementRef, Output, EventEmitter } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
 import { CoreSitePluginsProvider } from '../providers/siteplugins';
@@ -30,6 +30,9 @@ export class CoreSitePluginsCallWSBaseDirective implements OnInit, OnDestroy {
                                        // @see CoreSitePluginsProvider.loadOtherDataInArgs.
     @Input() form: string; // ID or name to identify a form. The form will be obtained from document.forms.
                            // If supplied and form is found, the form data will be retrieved and sent to the WS.
+    @Output() onSuccess: EventEmitter<any> = new EventEmitter<any>(); // Sends the result when the WS call succeeds.
+    @Output() onError: EventEmitter<any> = new EventEmitter<any>(); // Sends the error when the WS call fails.
+    @Output() onDone: EventEmitter<void> = new EventEmitter<void>(); // Notifies when the WS call is done (either success or fail).
 
     protected element: HTMLElement;
     protected invalidateObserver: Subscription;
@@ -60,9 +63,15 @@ export class CoreSitePluginsCallWSBaseDirective implements OnInit, OnDestroy {
         const params = this.getParamsForWS();
 
         return this.sitePluginsProvider.callWS(this.name, params, this.preSets).then((result) => {
+            this.onSuccess.emit(result);
+
             return this.wsCallSuccess(result);
         }).catch((error) => {
-            this.domUtils.showErrorModalDefault(error, 'core.serverconnection', true);
+            this.onError.emit(error);
+
+            return Promise.reject(error);
+        }).finally(() => {
+            this.onDone.emit();
         });
     }
 
diff --git a/src/core/siteplugins/directives/call-ws-new-content.ts b/src/core/siteplugins/directives/call-ws-new-content.ts
index 9d67ccba0..9117b831e 100644
--- a/src/core/siteplugins/directives/call-ws-new-content.ts
+++ b/src/core/siteplugins/directives/call-ws-new-content.ts
@@ -62,8 +62,8 @@ export class CoreSitePluginsCallWSNewContentDirective extends CoreSitePluginsCal
 
     constructor(element: ElementRef, translate: TranslateService, domUtils: CoreDomUtilsProvider,
             sitePluginsProvider: CoreSitePluginsProvider, @Optional() parentContent: CoreSitePluginsPluginContentComponent,
-            protected utils: CoreUtilsProvider, @Optional() protected navCtrl: NavController) {
-        super(element, translate, domUtils, sitePluginsProvider, parentContent);
+            utils: CoreUtilsProvider, @Optional() protected navCtrl: NavController) {
+        super(element, translate, domUtils, sitePluginsProvider, parentContent, utils);
     }
 
     /**
diff --git a/src/core/siteplugins/directives/call-ws.ts b/src/core/siteplugins/directives/call-ws.ts
index 7880ad64a..9a0742ed2 100644
--- a/src/core/siteplugins/directives/call-ws.ts
+++ b/src/core/siteplugins/directives/call-ws.ts
@@ -56,8 +56,8 @@ export class CoreSitePluginsCallWSDirective extends CoreSitePluginsCallWSOnClick
 
     constructor(element: ElementRef, translate: TranslateService, domUtils: CoreDomUtilsProvider,
             sitePluginsProvider: CoreSitePluginsProvider, @Optional() parentContent: CoreSitePluginsPluginContentComponent,
-            protected utils: CoreUtilsProvider, protected navCtrl: NavController) {
-        super(element, translate, domUtils, sitePluginsProvider, parentContent);
+            utils: CoreUtilsProvider, protected navCtrl: NavController) {
+        super(element, translate, domUtils, sitePluginsProvider, parentContent, utils);
     }
 
     /**