From 741c6009f4e6c917d729f4ef57e0c687a333a438 Mon Sep 17 00:00:00 2001
From: Yury Bondarenko <ybnd@tuta.io>
Date: Tue, 27 Jun 2023 14:06:36 +0200
Subject: [PATCH] ESLint: fix no-negated-async violations

---
 .../epeople-registry.component.html            |  2 +-
 .../eperson-form/eperson-form.component.html   | 18 +++++++++---------
 .../eperson-form/eperson-form.component.ts     | 18 ++++++++++++++----
 .../group-form/group-form.component.html       |  4 ++--
 .../subgroups-list.component.html              |  6 +++---
 .../subgroup-list/subgroups-list.component.ts  |  6 ++++++
 .../groups-registry.component.html             |  2 +-
 .../admin-sidebar/admin-sidebar.component.html |  6 +++---
 .../delete-collection-page.component.html      |  2 +-
 .../collection-source-controls.component.html  |  6 +++---
 .../collection-source.component.html           | 14 +++++++-------
 .../delete-community-page.component.html       |  2 +-
 .../header-navbar-wrapper.component.html       |  2 +-
 src/app/health-page/health-page.component.html |  2 +-
 .../edit-item-page.component.html              |  2 +-
 .../item-bitstreams.component.html             | 12 ++++++------
 ...drag-and-drop-bitstream-list.component.html |  2 +-
 .../edit-relationship-list.component.html      |  2 +-
 .../item-relationships.component.html          | 12 ++++++------
 .../collections/collections.component.html     |  2 +-
 .../orcid-auth/orcid-auth.component.html       |  6 +++---
 .../orcid-page/orcid-page.component.html       |  6 +++---
 .../orcid-queue/orcid-queue.component.html     |  4 ++--
 .../item-versions-summary-modal.component.html |  2 +-
 ...dspace-new-external-dropdown.component.html |  6 +++---
 ...pace-new-submission-dropdown.component.html |  6 +++---
 src/app/navbar/navbar.component.html           |  4 ++--
 .../detail/process-detail.component.html       |  4 ++--
 .../new/new-process.component.html             |  2 +-
 .../overview/process-overview.component.html   |  2 +-
 ...profile-page-researcher-form.component.html |  4 ++--
 .../register-email-form.component.html         |  2 +-
 src/app/root/root.component.html               |  2 +-
 .../auth-nav-menu/auth-nav-menu.component.html |  6 +++---
 .../user-menu/user-menu.component.html         |  2 +-
 .../collection-dropdown.component.html         |  2 +-
 .../comcol-role/comcol-role.component.html     |  2 +-
 .../entity-dropdown.component.html             |  2 +-
 .../file-download-link.component.html          |  2 +-
 ...isting-metadata-list-element.component.html |  2 +-
 ...isting-relation-list-element.component.html |  2 +-
 .../onebox/dynamic-onebox.component.html       |  2 +-
 .../dynamic-relation-group.component.html      |  6 +++---
 ...c-lookup-relation-search-tab.component.html |  2 +-
 src/app/shared/form/form.component.html        |  2 +-
 .../vocabulary-treeview.component.html         |  2 +-
 src/app/shared/log-in/log-in.component.html    |  2 +-
 ...claimed-task-actions-approve.component.html |  2 +-
 ...ed-task-actions-decline-task.component.html |  2 +-
 .../claimed-task-actions-reject.component.html |  4 ++--
 ...-task-actions-return-to-pool.component.html |  2 +-
 .../pool-task/pool-task-actions.component.html |  2 +-
 .../workspaceitem-actions.component.html       |  2 +-
 ...m-search-result-list-element.component.html |  2 +-
 ...tem-search-result-list-element.component.ts | 18 +++++++++---------
 ...m-search-result-list-element.component.html |  2 +-
 ...tem-search-result-list-element.component.ts | 18 +++++++++---------
 .../item-select/item-select.component.html     |  2 +-
 .../form/resource-policy-form.component.html   |  4 ++--
 .../resource-policies.component.html           |  4 ++--
 .../search-authority-filter.component.html     |  2 +-
 .../search-boolean-filter.component.html       |  2 +-
 .../search-hierarchy-filter.component.html     |  2 +-
 .../search-text-filter.component.html          |  2 +-
 src/app/shared/search/search.component.html    |  4 ++--
 .../subscription-modal.component.html          |  2 +-
 .../statistics-page.component.html             |  2 +-
 .../submission-form-collection.component.html  |  4 ++--
 .../submission-form-footer.component.html      |  8 ++++----
 .../submission-form-section-add.component.html |  4 ++--
 .../form/submission-form.component.html        |  4 ++--
 ...on-import-external-searchbar.component.html |  4 ++--
 .../submission-import-external.component.html  |  6 +++---
 .../container/section-container.component.html |  4 ++--
 .../file/section-upload-file.component.html    |  2 +-
 .../subscriptions-page.component.html          |  4 ++--
 .../header-navbar-wrapper.component.html       |  2 +-
 .../dspace/app/navbar/navbar.component.html    |  4 ++--
 78 files changed, 175 insertions(+), 159 deletions(-)

diff --git a/src/app/access-control/epeople-registry/epeople-registry.component.html b/src/app/access-control/epeople-registry/epeople-registry.component.html
index e3a8e2c590..8fff24e3b4 100644
--- a/src/app/access-control/epeople-registry/epeople-registry.component.html
+++ b/src/app/access-control/epeople-registry/epeople-registry.component.html
@@ -47,7 +47,7 @@
 
         <ds-themed-loading *ngIf="searching$ | async"></ds-themed-loading>
         <ds-pagination
-          *ngIf="(pageInfoState$ | async)?.totalElements > 0 && !(searching$ | async)"
+          *ngIf="(pageInfoState$ | async)?.totalElements > 0 && (searching$ | async) === false"
           [paginationOptions]="config"
           [pageInfoState]="pageInfoState$"
           [collectionSize]="(pageInfoState$ | async)?.totalElements"
diff --git a/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.html b/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.html
index 228449a8a5..b41472d82c 100644
--- a/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.html
+++ b/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.html
@@ -20,19 +20,19 @@
             class="btn btn-outline-secondary"><i class="fas fa-arrow-left"></i> {{messagePrefix + '.return' | translate}}</button>
   </div>
   <div *ngIf="displayResetPassword" between class="btn-group">
-    <button class="btn btn-primary" [disabled]="!(canReset$ | async)" (click)="resetPassword()">
+    <button class="btn btn-primary" [disabled]="(canReset$ | async) === false" (click)="resetPassword()">
       <i class="fa fa-key"></i> {{'admin.access-control.epeople.actions.reset' | translate}}
     </button>
   </div>
   <div between class="btn-group ml-1">
-    <button *ngIf="!isImpersonated" class="btn btn-primary" [ngClass]="{'d-none' : !(canImpersonate$ | async)}" (click)="impersonate()">
+    <button *ngIf="!isImpersonated" class="btn btn-primary" [ngClass]="{'d-none' : (canImpersonate$ | async) === false}" (click)="impersonate()">
       <i class="fa fa-user-secret"></i> {{'admin.access-control.epeople.actions.impersonate' | translate}}
     </button>
     <button *ngIf="isImpersonated" class="btn btn-primary" (click)="stopImpersonating()">
       <i class="fa fa-user-secret"></i> {{'admin.access-control.epeople.actions.stop-impersonating' | translate}}
     </button>
   </div>
-  <button after class="btn btn-danger delete-button" [disabled]="!(canDelete$ | async)" (click)="delete()">
+  <button after class="btn btn-danger delete-button" [disabled]="(canDelete$ | async) === false" (click)="delete()">
     <i class="fas fa-trash"></i> {{'admin.access-control.epeople.actions.delete' | translate}}
   </button>
 </ds-form>
@@ -42,13 +42,13 @@
 <div *ngIf="epersonService.getActiveEPerson() | async">
   <h5>{{messagePrefix + '.groupsEPersonIsMemberOf' | translate}}</h5>
 
-  <ds-themed-loading [showMessage]="false" *ngIf="!(groups | async)"></ds-themed-loading>
+  <ds-themed-loading [showMessage]="false" *ngIf="(groups$ | async) === undefined"></ds-themed-loading>
 
   <ds-pagination
-    *ngIf="(groups | async)?.payload?.totalElements > 0"
+    *ngIf="(groups$ | async)?.payload?.totalElements > 0"
     [paginationOptions]="config"
-    [pageInfoState]="(groups | async)?.payload"
-    [collectionSize]="(groups | async)?.payload?.totalElements"
+    [pageInfoState]="groupsPageInfoState$"
+    [collectionSize]="(groups$ | async)?.payload?.totalElements"
     [hideGear]="true"
     [hidePagerWhenSinglePage]="true"
     (pageChange)="onPageChange($event)">
@@ -63,7 +63,7 @@
         </tr>
         </thead>
         <tbody>
-        <tr *ngFor="let group of (groups | async)?.payload?.page">
+        <tr *ngFor="let group of (groups$ | async)?.payload?.page">
           <td class="align-middle">{{group.id}}</td>
           <td class="align-middle">
             <a (click)="groupsDataService.startEditingNewGroup(group)"
@@ -79,7 +79,7 @@
 
   </ds-pagination>
 
-  <div *ngIf="(groups | async)?.payload?.totalElements == 0" class="alert alert-info w-100 mb-2" role="alert">
+  <div *ngIf="(groups$ | async)?.payload?.totalElements == 0" class="alert alert-info w-100 mb-2" role="alert">
     <div>{{messagePrefix + '.memberOfNoGroups' | translate}}</div>
     <div>
       <button [routerLink]="[groupsDataService.getGroupRegistryRouterLink()]"
diff --git a/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.ts b/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.ts
index d009d56058..7665cb24da 100644
--- a/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.ts
+++ b/src/app/access-control/epeople-registry/eperson-form/eperson-form.component.ts
@@ -38,6 +38,7 @@ import { Registration } from '../../../core/shared/registration.model';
 import { EpersonRegistrationService } from '../../../core/data/eperson-registration.service';
 import { TYPE_REQUEST_FORGOT } from '../../../register-email-form/register-email-form.component';
 import { DSONameService } from '../../../core/breadcrumbs/dso-name.service';
+import { PageInfo } from '../../../core/shared/page-info.model';
 
 @Component({
   selector: 'ds-eperson-form',
@@ -145,7 +146,12 @@ export class EPersonFormComponent implements OnInit, OnDestroy {
   /**
    * A list of all the groups this EPerson is a member of
    */
-  groups: Observable<RemoteData<PaginatedList<Group>>>;
+  groups$: Observable<RemoteData<PaginatedList<Group>>>;
+
+  /**
+   * The pagination of the {@link groups$} list.
+   */
+  groupsPageInfoState$: Observable<PageInfo>;
 
   /**
    * Pagination config used to display the list of groups
@@ -279,7 +285,7 @@ export class EPersonFormComponent implements OnInit, OnDestroy {
       this.formGroup = this.formBuilderService.createFormGroup(this.formModel);
       this.subs.push(this.epersonService.getActiveEPerson().subscribe((eperson: EPerson) => {
         if (eperson != null) {
-          this.groups = this.groupsDataService.findListByHref(eperson._links.groups.href, {
+          this.groups$ = this.groupsDataService.findListByHref(eperson._links.groups.href, {
             currentPage: 1,
             elementsPerPage: this.config.pageSize
           });
@@ -302,7 +308,7 @@ export class EPersonFormComponent implements OnInit, OnDestroy {
 
       const activeEPerson$ = this.epersonService.getActiveEPerson();
 
-      this.groups = activeEPerson$.pipe(
+      this.groups$ = activeEPerson$.pipe(
         switchMap((eperson) => {
           return observableCombineLatest([observableOf(eperson), this.paginationService.getFindListOptions(this.config.id, {
             currentPage: 1,
@@ -317,6 +323,10 @@ export class EPersonFormComponent implements OnInit, OnDestroy {
         })
       );
 
+      this.groupsPageInfoState$ = this.groups$.pipe(
+        map(groupsRD => groupsRD.payload.pageInfo),
+      );
+
       this.canImpersonate$ = activeEPerson$.pipe(
         switchMap((eperson) => {
           if (hasValue(eperson)) {
@@ -578,7 +588,7 @@ export class EPersonFormComponent implements OnInit, OnDestroy {
    */
   private updateGroups(options) {
     this.subs.push(this.epersonService.getActiveEPerson().subscribe((eperson: EPerson) => {
-      this.groups = this.groupsDataService.findListByHref(eperson._links.groups.href, options);
+      this.groups$ = this.groupsDataService.findListByHref(eperson._links.groups.href, options);
     }));
   }
 }
diff --git a/src/app/access-control/group-registry/group-form/group-form.component.html b/src/app/access-control/group-registry/group-form/group-form.component.html
index 77a81a8daa..3117ae0b1d 100644
--- a/src/app/access-control/group-registry/group-form/group-form.component.html
+++ b/src/app/access-control/group-registry/group-form/group-form.component.html
@@ -25,7 +25,7 @@
 
       <ds-alert *ngIf="groupBeingEdited?.permanent" [type]="AlertTypeEnum.Warning"
                 [content]="messagePrefix + '.alert.permanent'"></ds-alert>
-      <ds-alert *ngIf="!(canEdit$ | async) && (groupDataService.getActiveGroup() | async)" [type]="AlertTypeEnum.Warning"
+      <ds-alert *ngIf="(canEdit$ | async) === false && (groupDataService.getActiveGroup() | async)" [type]="AlertTypeEnum.Warning"
                 [content]="(messagePrefix + '.alert.workflowGroup' | translate:{ name: dsoNameService.getName((getLinkedDSO(groupBeingEdited) | async)?.payload), comcol: (getLinkedDSO(groupBeingEdited) | async)?.payload?.type, comcolEditRolesRoute: (getLinkedEditRolesRoute(groupBeingEdited) | async) })">
       </ds-alert>
 
@@ -40,7 +40,7 @@
                   class="btn btn-outline-secondary"><i class="fas fa-arrow-left"></i> {{messagePrefix + '.return' | translate}}</button>
         </div>
         <div after *ngIf="groupBeingEdited != null" class="btn-group">
-          <button class="btn btn-danger delete-button" [disabled]="!(canEdit$ | async) || groupBeingEdited.permanent"
+          <button class="btn btn-danger delete-button" [disabled]="(canEdit$ | async) === false || groupBeingEdited.permanent"
                   (click)="delete()">
             <i class="fa fa-trash"></i> {{ messagePrefix + '.actions.delete' | translate}}
           </button>
diff --git a/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.html b/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.html
index d009f0283e..10e0530f6b 100644
--- a/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.html
+++ b/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.html
@@ -62,7 +62,7 @@
           <td class="align-middle">{{ dsoNameService.getName((group.object | async)?.payload) }}</td>
           <td class="align-middle">
             <div class="btn-group edit-field">
-              <button *ngIf="(isSubgroupOfGroup(group) | async) && !(isActiveGroup(group) | async)"
+              <button *ngIf="(isSubgroupOfGroup(group) | async) && (isActiveGroup(group) | async) === false"
                       (click)="deleteSubgroupFromGroup(group)"
                       class="btn btn-outline-danger btn-sm deleteButton"
                       title="{{messagePrefix + '.table.edit.buttons.remove' | translate: { name: dsoNameService.getName(group) } }}">
@@ -71,7 +71,7 @@
 
               <span *ngIf="(isActiveGroup(group) | async)">{{ messagePrefix + '.table.edit.currentGroup' | translate }}</span>
 
-              <button *ngIf="!(isSubgroupOfGroup(group) | async) && !(isActiveGroup(group) | async)"
+              <button *ngIf="(isSubgroupOfGroup(group)  | async) === false && (isActiveGroup(group) | async) === false"
                       (click)="addSubgroupToGroup(group)"
                       class="btn btn-outline-primary btn-sm addButton"
                       title="{{messagePrefix + '.table.edit.buttons.add' | translate: { name: dsoNameService.getName(group) } }}">
@@ -94,7 +94,7 @@
 
   <ds-pagination *ngIf="(subGroups$ | async)?.payload?.totalElements > 0"
                  [paginationOptions]="config"
-                 [pageInfoState]="(subGroups$ | async)?.payload"
+                 [pageInfoState]="subGroupsPageInfoState$"
                  [collectionSize]="(subGroups$ | async)?.payload?.totalElements"
                  [hideGear]="true"
                  [hidePagerWhenSinglePage]="true">
diff --git a/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.ts b/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.ts
index 0cff730c62..b154c38b6e 100644
--- a/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.ts
+++ b/src/app/access-control/group-registry/group-form/subgroup-list/subgroups-list.component.ts
@@ -19,6 +19,7 @@ import { NoContent } from '../../../../core/shared/NoContent.model';
 import { PaginationService } from '../../../../core/pagination/pagination.service';
 import { followLink } from '../../../../shared/utils/follow-link-config.model';
 import { DSONameService } from '../../../../core/breadcrumbs/dso-name.service';
+import { PageInfo } from '../../../../core/shared/page-info.model';
 
 /**
  * Keys to keep track of specific subscriptions
@@ -50,6 +51,8 @@ export class SubgroupsListComponent implements OnInit, OnDestroy {
    */
   subGroups$: BehaviorSubject<RemoteData<PaginatedList<Group>>> = new BehaviorSubject(undefined);
 
+  subGroupsPageInfoState$: Observable<PageInfo>;
+
   /**
    * Map of active subscriptions
    */
@@ -105,6 +108,9 @@ export class SubgroupsListComponent implements OnInit, OnDestroy {
         this.retrieveSubGroups();
       }
     }));
+    this.subGroupsPageInfoState$ = this.subGroups$.pipe(
+      map(subGroupsRD => subGroupsRD?.payload?.pageInfo),
+    );
   }
 
   /**
diff --git a/src/app/access-control/group-registry/groups-registry.component.html b/src/app/access-control/group-registry/groups-registry.component.html
index 828aadc95a..989250653b 100644
--- a/src/app/access-control/group-registry/groups-registry.component.html
+++ b/src/app/access-control/group-registry/groups-registry.component.html
@@ -35,7 +35,7 @@
 
       <ds-themed-loading *ngIf="loading$ | async"></ds-themed-loading>
       <ds-pagination
-        *ngIf="(pageInfoState$ | async)?.totalElements > 0 && !(loading$ | async)"
+        *ngIf="(pageInfoState$ | async)?.totalElements > 0 && (loading$ | async) === false"
         [paginationOptions]="config"
         [pageInfoState]="pageInfoState$"
         [collectionSize]="(pageInfoState$ | async)?.totalElements"
diff --git a/src/app/admin/admin-sidebar/admin-sidebar.component.html b/src/app/admin/admin-sidebar/admin-sidebar.component.html
index ef220b834b..be83554921 100644
--- a/src/app/admin/admin-sidebar/admin-sidebar.component.html
+++ b/src/app/admin/admin-sidebar/admin-sidebar.component.html
@@ -1,7 +1,7 @@
 <nav class="navbar navbar-dark p-0"
      [ngClass]="{'active': sidebarOpen, 'inactive': sidebarClosed}"
      [@slideSidebar]="{
-      value: (!(sidebarExpanded | async) ? 'collapsed' : 'expanded'),
+      value: ((sidebarExpanded | async) === false ? 'collapsed' : 'expanded'),
       params: {sidebarWidth: (sidebarWidth | async)}
      }" (@slideSidebar.done)="finishSlide($event)" (@slideSidebar.start)="startSlide($event)"
      *ngIf="menuVisible | async"
@@ -42,12 +42,12 @@
               <div class="shortcut-icon">
                 <i *ngIf="(menuCollapsed | async)" class="fas fa-fw fa-angle-double-right"
                    [title]="'menu.section.icon.pin' | translate"></i>
-                <i *ngIf="!(menuCollapsed | async)" class="fas fa-fw fa-angle-double-left"
+                <i *ngIf="(menuCollapsed | async) === false" class="fas fa-fw fa-angle-double-left"
                    [title]="'menu.section.icon.unpin' | translate"></i>
               </div>
               <div class="sidebar-collapsible">
                 <span *ngIf="menuCollapsed | async" class="section-header-text">{{'menu.section.pin' | translate }}</span>
-                <span *ngIf="!(menuCollapsed | async)" class="section-header-text">{{'menu.section.unpin' | translate }}</span>
+                <span *ngIf="(menuCollapsed | async) === false" class="section-header-text">{{'menu.section.unpin' | translate }}</span>
               </div>
             </a>
         </div>
diff --git a/src/app/collection-page/delete-collection-page/delete-collection-page.component.html b/src/app/collection-page/delete-collection-page/delete-collection-page.component.html
index ba54bbabd5..0617b0dc60 100644
--- a/src/app/collection-page/delete-collection-page/delete-collection-page.component.html
+++ b/src/app/collection-page/delete-collection-page/delete-collection-page.component.html
@@ -11,7 +11,7 @@
                     </button>
                     <button class="btn btn-danger" (click)="onConfirm(dso)" [disabled]="(processing$ | async)">
                       <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'collection.delete.processing' | translate}}</span>
-                      <span *ngIf="!(processing$ | async)"><i class="fas fa-trash"></i> {{'collection.delete.confirm' | translate}}</span>
+                      <span *ngIf="(processing$ | async) === false"><i class="fas fa-trash"></i> {{'collection.delete.confirm' | translate}}</span>
                     </button>
                   </div>
                 </div>
diff --git a/src/app/collection-page/edit-collection-page/collection-source/collection-source-controls/collection-source-controls.component.html b/src/app/collection-page/edit-collection-page/collection-source/collection-source-controls/collection-source-controls.component.html
index 4d7b3e657e..7bb4ce22ad 100644
--- a/src/app/collection-page/edit-collection-page/collection-source/collection-source-controls/collection-source-controls.component.html
+++ b/src/app/collection-page/edit-collection-page/collection-source/collection-source-controls/collection-source-controls.component.html
@@ -18,7 +18,7 @@
             <span>{{contentSource?.message ? contentSource?.message: 'collection.source.controls.harvest.no-information'|translate }}</span>
         </div>
 
-        <button *ngIf="!(testConfigRunning$ |async)" class="btn btn-secondary"
+        <button *ngIf="(testConfigRunning$ |async) === false" class="btn btn-secondary"
                 [disabled]="!(isEnabled)"
                 (click)="testConfiguration(contentSource)">
             <span>{{'collection.source.controls.test.submit' | translate}}</span>
@@ -28,7 +28,7 @@
             <span class="spinner-border spinner-border-sm spinner-button" role="status" aria-hidden="true"></span>
             <span>{{'collection.source.controls.test.running' | translate}}</span>
         </button>
-        <button *ngIf="!(importRunning$ |async)" class="btn btn-primary"
+        <button *ngIf="(importRunning$ |async) === false" class="btn btn-primary"
                 [disabled]="!(isEnabled)"
                 (click)="importNow()">
             <span class="d-none d-sm-inline">{{'collection.source.controls.import.submit' | translate}}</span>
@@ -38,7 +38,7 @@
             <span class="spinner-border spinner-border-sm spinner-button" role="status" aria-hidden="true"></span>
             <span class="d-none d-sm-inline">{{'collection.source.controls.import.running' | translate}}</span>
         </button>
-        <button *ngIf="!(reImportRunning$ |async)" class="btn btn-primary"
+        <button *ngIf="(reImportRunning$ |async) === false" class="btn btn-primary"
                 [disabled]="!(isEnabled)"
                 (click)="resetAndReimport()">
             <span class="d-none d-sm-inline">&nbsp;{{'collection.source.controls.reset.submit' | translate}}</span>
diff --git a/src/app/collection-page/edit-collection-page/collection-source/collection-source.component.html b/src/app/collection-page/edit-collection-page/collection-source/collection-source.component.html
index d7b0d0c475..ccc7e887f7 100644
--- a/src/app/collection-page/edit-collection-page/collection-source/collection-source.component.html
+++ b/src/app/collection-page/edit-collection-page/collection-source/collection-source.component.html
@@ -1,7 +1,7 @@
 <div class="container-fluid">
     <div class="d-inline-block float-right space-children-mr">
-        <button class=" btn btn-danger" *ngIf="!(isReinstatable() | async)"
-                [disabled]="!(hasChanges() | async)"
+        <button class=" btn btn-danger" *ngIf="(isReinstatable()  | async) === false"
+                [disabled]="(hasChanges()  | async) === false"
                 (click)="discard()"><i
                 class="fas fa-times"></i>
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
@@ -12,7 +12,7 @@
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
         </button>
         <button class="btn btn-primary"
-                [disabled]="!(hasChanges() | async) || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
+                [disabled]="(hasChanges()  | async) === false || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
                 (click)="onSubmit()"><i
                 class="fas fa-save"></i>
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
@@ -44,8 +44,8 @@
     <div class="row">
         <div class="col-12">
             <div class="d-inline-block float-right ml-1 space-children-mr">
-                <button class=" btn btn-danger" *ngIf="!(isReinstatable() | async)"
-                        [disabled]="!(hasChanges() | async)"
+                <button class=" btn btn-danger" *ngIf="(isReinstatable()  | async) === false"
+                        [disabled]="(hasChanges()  | async) === false"
                         (click)="discard()"><i
                         class="fas fa-times"></i>
                     <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
@@ -56,7 +56,7 @@
                     <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
                 </button>
                 <button class="btn btn-primary"
-                        [disabled]="!(hasChanges() | async) || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
+                        [disabled]="(hasChanges()  | async) === false || !isValid() || (initialHarvestType === harvestTypeNone && contentSource.harvestType === initialHarvestType)"
                         (click)="onSubmit()"><i
                         class="fas fa-save"></i>
                     <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
@@ -66,7 +66,7 @@
     </div>
 </div>
 <ds-collection-source-controls
-        [isEnabled]="!(hasChanges()|async)"
+        [isEnabled]="(hasChanges() | async) === false"
         [shouldShow]="contentSource?.harvestType !== harvestTypeNone"
         [collection]="(collectionRD$ |async)?.payload"
 >
diff --git a/src/app/community-page/delete-community-page/delete-community-page.component.html b/src/app/community-page/delete-community-page/delete-community-page.component.html
index 6bb8460bc9..2c40f4f969 100644
--- a/src/app/community-page/delete-community-page/delete-community-page.component.html
+++ b/src/app/community-page/delete-community-page/delete-community-page.component.html
@@ -11,7 +11,7 @@
                         </button>
                         <button class="btn btn-danger" (click)="onConfirm(dso)" [disabled]="(processing$ | async)">
                             <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'community.delete.processing' | translate}}</span>
-                            <span *ngIf="!(processing$ | async)"><i class="fas fa-trash"></i> {{'community.delete.confirm' | translate}}</span>
+                            <span *ngIf="(processing$ | async) === false"><i class="fas fa-trash"></i> {{'community.delete.confirm' | translate}}</span>
                         </button>
                     </div>
                 </div>
diff --git a/src/app/header-nav-wrapper/header-navbar-wrapper.component.html b/src/app/header-nav-wrapper/header-navbar-wrapper.component.html
index f99070b738..5312ef1e19 100644
--- a/src/app/header-nav-wrapper/header-navbar-wrapper.component.html
+++ b/src/app/header-nav-wrapper/header-navbar-wrapper.component.html
@@ -1,4 +1,4 @@
-<div [ngClass]="{'open': !(isNavBarCollapsed | async)}">
+<div [ngClass]="{'open': (isNavBarCollapsed | async) === false}">
     <ds-themed-header></ds-themed-header>
     <ds-themed-navbar></ds-themed-navbar>
 </div>
diff --git a/src/app/health-page/health-page.component.html b/src/app/health-page/health-page.component.html
index 8083389e1b..9a93c22a22 100644
--- a/src/app/health-page/health-page.component.html
+++ b/src/app/health-page/health-page.component.html
@@ -21,7 +21,7 @@
     </ul>
     <div [ngbNavOutlet]="nav" class="mt-2"></div>
   </div>
-  <ds-alert *ngIf="!(healthResponse | async) || !(healthInfoResponse | async)" [type]="'alert-danger'" [content]="'health-page.error.msg'"></ds-alert>
+  <ds-alert *ngIf="(healthResponse | async) === null || (healthInfoResponse | async) === null" [type]="'alert-danger'" [content]="'health-page.error.msg'"></ds-alert>
 </div>
 
 
diff --git a/src/app/item-page/edit-item-page/edit-item-page.component.html b/src/app/item-page/edit-item-page/edit-item-page.component.html
index c370fe4f20..5ec2e992d9 100644
--- a/src/app/item-page/edit-item-page/edit-item-page.component.html
+++ b/src/app/item-page/edit-item-page/edit-item-page.component.html
@@ -12,7 +12,7 @@
                             {{'item.edit.tabs.' + page.page + '.head' | translate}}
                         </a>
                         <span [ngbTooltip]="'item.edit.tabs.disabled.tooltip' | translate">
-                            <button *ngIf="!(page.enabled | async)"
+                            <button *ngIf="(page.enabled | async) === false"
                                  class="nav-link disabled">
                                 {{'item.edit.tabs.' + page.page + '.head' | translate}}
                             </button>
diff --git a/src/app/item-page/edit-item-page/item-bitstreams/item-bitstreams.component.html b/src/app/item-page/edit-item-page/item-bitstreams/item-bitstreams.component.html
index 4cb9577fcb..d2de98fdd4 100644
--- a/src/app/item-page/edit-item-page/item-bitstreams/item-bitstreams.component.html
+++ b/src/app/item-page/edit-item-page/item-bitstreams/item-bitstreams.component.html
@@ -10,13 +10,13 @@
             class="fas fa-undo-alt"></i>
       <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.reinstate-button" | translate}}</span>
     </button>
-    <button class="btn btn-primary" [disabled]="!(hasChanges() | async) || submitting"
+    <button class="btn btn-primary" [disabled]="(hasChanges()  | async) === false || submitting"
             (click)="submit()"><i
             class="fas fa-save"></i>
       <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.save-button" | translate}}</span>
     </button>
-    <button class="btn btn-danger" *ngIf="!(isReinstatable() | async)"
-            [disabled]="!(hasChanges() | async) || submitting"
+    <button class="btn btn-danger" *ngIf="(isReinstatable()  | async) === false"
+            [disabled]="(hasChanges()  | async) === false || submitting"
             (click)="discard()"><i
             class="fas fa-times"></i>
       <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.discard-button" | translate}}</span>
@@ -53,13 +53,13 @@
         class="fas fa-undo-alt"></i>
         <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.reinstate-button" | translate}}</span>
       </button>
-      <button class="btn btn-primary" [disabled]="!(hasChanges() | async) || submitting"
+      <button class="btn btn-primary" [disabled]="(hasChanges()  | async) === false || submitting"
               (click)="submit()"><i
         class="fas fa-save"></i>
         <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.save-button" | translate}}</span>
       </button>
-      <button class="btn btn-danger" *ngIf="!(isReinstatable() | async)"
-              [disabled]="!(hasChanges() | async) || submitting"
+      <button class="btn btn-danger" *ngIf="(isReinstatable()  | async) === false"
+              [disabled]="(hasChanges()  | async) === false || submitting"
               (click)="discard()"><i
         class="fas fa-times"></i>
         <span class="d-none d-sm-inline">&nbsp;{{"item.edit.bitstreams.discard-button" | translate}}</span>
diff --git a/src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/paginated-drag-and-drop-bitstream-list/paginated-drag-and-drop-bitstream-list.component.html b/src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/paginated-drag-and-drop-bitstream-list/paginated-drag-and-drop-bitstream-list.component.html
index f54aa73597..d0d3c5d5c0 100644
--- a/src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/paginated-drag-and-drop-bitstream-list/paginated-drag-and-drop-bitstream-list.component.html
+++ b/src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/paginated-drag-and-drop-bitstream-list/paginated-drag-and-drop-bitstream-list.component.html
@@ -5,7 +5,7 @@
                [paginationOptions]="options"
                [pageInfoState]="(objectsRD$ | async)?.payload"
                [collectionSize]="(objectsRD$ | async)?.payload?.totalElements">
-  <ng-container *ngIf="!(loading$ | async)">
+  <ng-container *ngIf="(loading$ | async) === false">
     <div [id]="bundle.id" class="bundle-bitstreams-list"
          [ngClass]="{'mb-3': (objectsRD$ | async)?.payload?.totalElements > pageSize}"
          *ngVar="(updates$ | async) as updates" cdkDropList (cdkDropListDropped)="drop($event)">
diff --git a/src/app/item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.html b/src/app/item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.html
index 7cdc903f24..907c0ccec1 100644
--- a/src/app/item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.html
+++ b/src/app/item-page/edit-item-page/item-relationships/edit-relationship-list/edit-relationship-list.component.html
@@ -6,7 +6,7 @@
     </button>
 </h5>
 <ng-container *ngVar="updates$ | async as updates">
-    <ng-container *ngIf="updates && !(loading$ | async)">
+    <ng-container *ngIf="updates && (loading$ | async) === false">
         <ng-container *ngVar="updates | dsObjectValues as updateValues">
           <ds-pagination
             [paginationOptions]="paginationConfig"
diff --git a/src/app/item-page/edit-item-page/item-relationships/item-relationships.component.html b/src/app/item-page/edit-item-page/item-relationships/item-relationships.component.html
index c1505deb58..3dea5d7d10 100644
--- a/src/app/item-page/edit-item-page/item-relationships/item-relationships.component.html
+++ b/src/app/item-page/edit-item-page/item-relationships/item-relationships.component.html
@@ -2,8 +2,8 @@
   <ng-container *ngVar="entityType$ | async as entityType">
     <ng-container *ngIf="entityType">
       <div class="button-row top d-flex space-children-mr">
-        <button class="btn btn-danger ml-auto" *ngIf="!(isReinstatable() | async)"
-                [disabled]="!(hasChanges() | async)"
+        <button class="btn btn-danger ml-auto" *ngIf="(isReinstatable()  | async) === false"
+                [disabled]="(hasChanges()  | async) === false"
                 (click)="discard()"><i
           class="fas fa-times"></i>
           <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
@@ -13,7 +13,7 @@
           class="fas fa-undo-alt"></i>
           <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
         </button>
-        <button class="btn btn-primary" [disabled]="!(hasChanges() | async)"
+        <button class="btn btn-primary" [disabled]="(hasChanges()  | async) === false"
                 (click)="submit()"><i
           class="fas fa-save"></i>
           <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
@@ -36,8 +36,8 @@
       </ng-container>
       <div class="button-row bottom">
         <div class="float-right space-children-mr ml-gap">
-          <button class="btn btn-danger" *ngIf="!(isReinstatable() | async)"
-                  [disabled]="!(hasChanges() | async)"
+          <button class="btn btn-danger" *ngIf="(isReinstatable()  | async) === false"
+                  [disabled]="(hasChanges()  | async) === false"
                   (click)="discard()"><i
             class="fas fa-times"></i>
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.discard-button" | translate}}</span>
@@ -47,7 +47,7 @@
             class="fas fa-undo-alt"></i>
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.reinstate-button" | translate}}</span>
           </button>
-          <button class="btn btn-primary" [disabled]="!(hasChanges() | async)"
+          <button class="btn btn-primary" [disabled]="(hasChanges()  | async) === false"
                   (click)="submit()"><i
             class="fas fa-save"></i>
             <span class="d-none d-sm-inline">&nbsp;{{"item.edit.metadata.save-button" | translate}}</span>
diff --git a/src/app/item-page/field-components/collections/collections.component.html b/src/app/item-page/field-components/collections/collections.component.html
index 27ebb41d61..70eb25ccf1 100644
--- a/src/app/item-page/field-components/collections/collections.component.html
+++ b/src/app/item-page/field-components/collections/collections.component.html
@@ -10,7 +10,7 @@
     </div>
 
     <a
-        *ngIf="!(isLoading$ | async) && (hasMore$ | async)"
+        *ngIf="(isLoading$ | async) === false && (hasMore$ | async)"
         (click)="$event.preventDefault(); handleLoadMore()"
         class="load-more-btn btn btn-sm btn-outline-secondary"
         role="button"
diff --git a/src/app/item-page/orcid-page/orcid-auth/orcid-auth.component.html b/src/app/item-page/orcid-page/orcid-auth/orcid-auth.component.html
index e57ce33008..dfa481a612 100644
--- a/src/app/item-page/orcid-page/orcid-auth/orcid-auth.component.html
+++ b/src/app/item-page/orcid-page/orcid-auth/orcid-auth.component.html
@@ -25,7 +25,7 @@
           <div class="card-header">{{ 'person.page.orcid.missing-authorizations'| translate }}</div>
           <div class="card-body">
             <div class="container">
-              <ds-alert *ngIf="!(hasMissingOrcidAuthorizations() | async)" [type]="'alert-success'" data-test="noMissingOrcidAuthorizations">
+              <ds-alert *ngIf="(hasMissingOrcidAuthorizations()  | async) === false" [type]="'alert-success'" data-test="noMissingOrcidAuthorizations">
                 {{'person.page.orcid.no-missing-authorizations-message' | translate}}
               </ds-alert>
               <ds-alert *ngIf="(hasMissingOrcidAuthorizations() | async)" [type]="'alert-warning'" data-test="missingOrcidAuthorizations">
@@ -41,7 +41,7 @@
         </div>
       </div>
     </div>
-    <ds-alert *ngIf="(onlyAdminCanDisconnectProfileFromOrcid() | async) && !(ownerCanDisconnectProfileFromOrcid() | async)"
+    <ds-alert *ngIf="(onlyAdminCanDisconnectProfileFromOrcid() | async) && (ownerCanDisconnectProfileFromOrcid()  | async) === false"
               [type]="'alert-warning'" data-test="unlinkOnlyAdmin">
       {{ 'person.page.orcid.remove-orcid-message' | translate}}
     </ds-alert>
@@ -49,7 +49,7 @@
       <div class="col">
         <button type="submit" class="btn btn-danger float-right" (click)="unlinkOrcid()"
                 [disabled]="(unlinkProcessing | async)">
-          <span *ngIf="!(unlinkProcessing | async)"><i
+          <span *ngIf="(unlinkProcessing | async) === false"><i
             class="fas fa-unlink"></i> {{ 'person.page.orcid.unlink' | translate }}</span>
           <span *ngIf="(unlinkProcessing | async)"><i
             class='fas fa-circle-notch fa-spin'></i> {{'person.page.orcid.unlink.processing' | translate}}</span>
diff --git a/src/app/item-page/orcid-page/orcid-page.component.html b/src/app/item-page/orcid-page/orcid-page.component.html
index 33c3125d67..c2b54045c5 100644
--- a/src/app/item-page/orcid-page/orcid-page.component.html
+++ b/src/app/item-page/orcid-page/orcid-page.component.html
@@ -1,4 +1,4 @@
-<div *ngIf="!(processingConnection | async) && (item | async)" class="container">
+<div *ngIf="(processingConnection | async) === false && (item | async)" class="container">
   <div class="button-row bottom mb-3">
     <div class="text-right">
       <a [routerLink]="getItemPage()" role="button" class="btn btn-outline-secondary" data-test="back-button">
@@ -9,10 +9,10 @@
 </div>
 
 <ds-loading *ngIf="(processingConnection | async)" [message]="'person.page.orcid.link.processing' | translate"></ds-loading>
-<div class="container" *ngIf="!(processingConnection | async) && !(connectionStatus | async)" data-test="error-box">
+<div class="container" *ngIf="(processingConnection | async) === false && (connectionStatus | async) === false" data-test="error-box">
   <ds-alert [type]="'alert-danger'">{{'person.page.orcid.link.error.message' | translate}}</ds-alert>
 </div>
-<ng-container *ngIf="!(processingConnection | async) && (item | async) && (connectionStatus | async)" >
+<ng-container *ngIf="(processingConnection | async) === false && (item | async) && (connectionStatus | async)" >
   <ds-orcid-auth [item]="(item | async)" (unlink)="updateItem()" data-test="orcid-auth"></ds-orcid-auth>
   <ds-orcid-sync-setting *ngIf="isLinkedToOrcid()" [item]="(item | async)" (settingsUpdated)="updateItem()" data-test="orcid-sync-setting"></ds-orcid-sync-setting>
   <ds-orcid-queue *ngIf="isLinkedToOrcid()" [item]="(item | async)"></ds-orcid-queue>
diff --git a/src/app/item-page/orcid-page/orcid-queue/orcid-queue.component.html b/src/app/item-page/orcid-page/orcid-queue/orcid-queue.component.html
index 6ba318f7fd..f70b37b5e9 100644
--- a/src/app/item-page/orcid-page/orcid-queue/orcid-queue.component.html
+++ b/src/app/item-page/orcid-page/orcid-queue/orcid-queue.component.html
@@ -3,11 +3,11 @@
   <div class="container">
     <h2>{{ 'person.orcid.registry.queue' | translate }}</h2>
 
-    <ds-alert *ngIf="!(processing$ | async) && (getList() | async)?.payload?.totalElements == 0"
+    <ds-alert *ngIf="(processing$ | async) === false && (getList() | async)?.payload?.totalElements == 0"
               [type]="AlertTypeEnum.Info">
       {{ 'person.page.orcid.sync-queue.empty-message' | translate}}
     </ds-alert>
-    <ds-pagination *ngIf="!(processing$ | async) && (getList() | async)?.payload?.totalElements > 0"
+    <ds-pagination *ngIf="(processing$ | async) === false && (getList() | async)?.payload?.totalElements > 0"
                    [paginationOptions]="paginationOptions"
                    [collectionSize]="(getList() | async)?.payload?.totalElements"
                    [retainScrollPosition]="false" [hideGear]="true" (paginationChange)="updateList()">
diff --git a/src/app/item-page/versions/item-versions-summary-modal/item-versions-summary-modal.component.html b/src/app/item-page/versions/item-versions-summary-modal/item-versions-summary-modal.component.html
index 0aa22f80cf..98a6045475 100644
--- a/src/app/item-page/versions/item-versions-summary-modal/item-versions-summary-modal.component.html
+++ b/src/app/item-page/versions/item-versions-summary-modal/item-versions-summary-modal.component.html
@@ -1,4 +1,4 @@
-<div *ngIf="!(this.submitted$ | async); else waiting">
+<div *ngIf="(this.submitted$ | async) === false; else waiting">
   <div class="modal-header">{{'item.version.create.modal.header' | translate}}
     <button type="button" class="close" (click)="onModalClose()" aria-label="Close">
       <span aria-hidden="true">×</span>
diff --git a/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-external-dropdown/my-dspace-new-external-dropdown.component.html b/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-external-dropdown/my-dspace-new-external-dropdown.component.html
index 7db6db9a8d..b9912a895e 100644
--- a/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-external-dropdown/my-dspace-new-external-dropdown.component.html
+++ b/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-external-dropdown/my-dspace-new-external-dropdown.component.html
@@ -1,5 +1,5 @@
-  <div class="add" *ngIf="!(moreThanOne$ | async)">
-    <button class="btn btn-lg btn-outline-primary mt-1 ml-2" [disabled]="!(initialized$|async)"
+  <div class="add" *ngIf="(moreThanOne$ | async) === false">
+    <button class="btn btn-lg btn-outline-primary mt-1 ml-2" [disabled]="(initialized$ | async) === false"
             (click)="openPage(singleEntity)" role="button"
             title="{{'mydspace.new-submission-external' | translate}}">
       <i class="fa fa-file-import" aria-hidden="true"></i>
@@ -9,7 +9,7 @@
        ngbDropdown
        *ngIf="(moreThanOne$ | async)">
     <button class="btn btn-lg btn-outline-primary mt-1 ml-2" id="dropdownImport" ngbDropdownToggle
-            type="button" [disabled]="!(initialized$|async)"
+            type="button" [disabled]="(initialized$ | async) === false"
             attr.aria-label="{{'mydspace.new-submission-external' | translate}}"
             [attr.data-test]="'import-dropdown' | dsBrowserOnly"
             title="{{'mydspace.new-submission-external' | translate}}">
diff --git a/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-submission-dropdown/my-dspace-new-submission-dropdown.component.html b/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-submission-dropdown/my-dspace-new-submission-dropdown.component.html
index 84d0649277..73070deb28 100644
--- a/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-submission-dropdown/my-dspace-new-submission-dropdown.component.html
+++ b/src/app/my-dspace-page/my-dspace-new-submission/my-dspace-new-submission-dropdown/my-dspace-new-submission-dropdown.component.html
@@ -1,5 +1,5 @@
-  <div class="add" *ngIf="!(moreThanOne$ | async)">
-    <button class="btn btn-lg btn-primary mt-1 ml-2" [disabled]="!(initialized$|async)" (click)="openDialog(singleEntity)" role="button">
+  <div class="add" *ngIf="(moreThanOne$ | async) === false">
+    <button class="btn btn-lg btn-primary mt-1 ml-2" [disabled]="(initialized$ | async) === false" (click)="openDialog(singleEntity)" role="button">
       <i class="fa fa-plus-circle" aria-hidden="true"></i>
     </button>
   </div>
@@ -7,7 +7,7 @@
        ngbDropdown
        *ngIf="(moreThanOne$ | async)">
     <button class="btn btn-lg btn-primary mt-1 ml-2" id="dropdownSubmission" ngbDropdownToggle
-            type="button"  [disabled]="!(initialized$|async)"
+            type="button"  [disabled]="(initialized$ | async) === false"
             attr.aria-label="{{'mydspace.new-submission' | translate}}"
             [attr.data-test]="'submission-dropdown' | dsBrowserOnly"
             title="{{'mydspace.new-submission' | translate}}">
diff --git a/src/app/navbar/navbar.component.html b/src/app/navbar/navbar.component.html
index bc1e04f513..fece444298 100644
--- a/src/app/navbar/navbar.component.html
+++ b/src/app/navbar/navbar.component.html
@@ -1,7 +1,7 @@
-<nav [ngClass]="{'open': !(menuCollapsed | async)}" [@slideMobileNav]="!(windowService.isXsOrSm() | async) ? 'default' : ((menuCollapsed | async) ? 'collapsed' : 'expanded')"
+<nav [ngClass]="{'open': (menuCollapsed | async) === false}" [@slideMobileNav]="(windowService.isXsOrSm()  | async) === false ? 'default' : ((menuCollapsed | async) ? 'collapsed' : 'expanded')"
     class="navbar navbar-light navbar-expand-md p-md-0 navbar-container" role="navigation" [attr.aria-label]="'nav.main.description' | translate">
     <!-- TODO remove navbar-container class when https://github.com/twbs/bootstrap/issues/24726 is fixed -->
-    <div class="navbar-inner-container w-100" [class.container]="!(isXsOrSm$ | async)">
+    <div class="navbar-inner-container w-100" [class.container]="(isXsOrSm$ | async) === false">
         <div class="reset-padding-md w-100">
             <div id="collapsingNav">
                 <ul class="navbar-nav navbar-navigation mr-auto shadow-none">
diff --git a/src/app/process-page/detail/process-detail.component.html b/src/app/process-page/detail/process-detail.component.html
index 5f905cbfff..5db981d430 100644
--- a/src/app/process-page/detail/process-detail.component.html
+++ b/src/app/process-page/detail/process-detail.component.html
@@ -55,8 +55,8 @@
                            message="{{ 'process.detail.logs.loading' | translate }}"></ds-themed-loading>
         <pre class="font-weight-bold text-secondary bg-light p-3"
              *ngIf="showOutputLogs && (outputLogs$ | async)?.length > 0">{{ (outputLogs$ | async) }}</pre>
-        <p id="no-output-logs-message" *ngIf="(!(retrievingOutputLogs$ | async) && showOutputLogs)
-      && !(outputLogs$ | async) || (outputLogs$ | async)?.length == 0 || !process._links.output">
+        <p id="no-output-logs-message" *ngIf="((retrievingOutputLogs$ | async) === false && showOutputLogs)
+      && (outputLogs$ | async) === null || (outputLogs$ | async)?.length === 0 || !process._links.output">
             {{ 'process.detail.logs.none' | translate }}
         </p>
     </ds-process-detail-field>
diff --git a/src/app/process-page/new/new-process.component.html b/src/app/process-page/new/new-process.component.html
index f61764ffd2..cf4c225417 100644
--- a/src/app/process-page/new/new-process.component.html
+++ b/src/app/process-page/new/new-process.component.html
@@ -1,6 +1,6 @@
 <ng-container *ngIf="fromExisting$ && (fromExisting$ | async)">
     <ds-process-form *ngVar="fromExisting$ | async as process" headerKey="process.new.header" [selectedScript]="script$ | async" [parameters]="process.parameters"></ds-process-form>
 </ng-container>
-<ng-container *ngIf="!fromExisting$ || !(fromExisting$ | async)">
+<ng-container *ngIf="!fromExisting$ || (fromExisting$ | async) === null">
     <ds-process-form headerKey="process.new.header"></ds-process-form>
 </ng-container>
diff --git a/src/app/process-page/overview/process-overview.component.html b/src/app/process-page/overview/process-overview.component.html
index 5bf5fee79f..b6e21ca7fa 100644
--- a/src/app/process-page/overview/process-overview.component.html
+++ b/src/app/process-page/overview/process-overview.component.html
@@ -70,7 +70,7 @@
         </div>
 
         <div class="modal-body">
-            <div *ngIf="!(processBulkDeleteService.isProcessing$() |async)">{{'process.overview.delete.body' | translate: {count: processBulkDeleteService.getAmountOfSelectedProcesses()} }}</div>
+            <div *ngIf="(processBulkDeleteService.isProcessing$()  | async) === false">{{'process.overview.delete.body' | translate: {count: processBulkDeleteService.getAmountOfSelectedProcesses()} }}</div>
             <div *ngIf="processBulkDeleteService.isProcessing$() |async" class="alert alert-info">
                 <span class="spinner-border spinner-border-sm spinner-button" role="status" aria-hidden="true"></span>
                 <span> {{ 'process.overview.delete.processing' | translate: {count: processBulkDeleteService.getAmountOfSelectedProcesses()} }}</span>
diff --git a/src/app/profile-page/profile-page-researcher-form/profile-page-researcher-form.component.html b/src/app/profile-page/profile-page-researcher-form/profile-page-researcher-form.component.html
index 2d959c1dfe..1372ce76f2 100644
--- a/src/app/profile-page/profile-page-researcher-form/profile-page-researcher-form.component.html
+++ b/src/app/profile-page/profile-page-researcher-form/profile-page-researcher-form.component.html
@@ -18,7 +18,7 @@
     <span *ngIf="(isProcessingCreate() | async)">
         <i class='fas fa-circle-notch fa-spin'></i> {{'researcher.profile.action.processing' | translate}}
     </span>
-    <span *ngIf="!(isProcessingCreate() | async)">
+    <span *ngIf="(isProcessingCreate()  | async) === false">
         <i class="fas fa-plus"></i> &nbsp;{{'researcher.profile.create.new' | translate}}
     </span>
   </button>
@@ -30,7 +30,7 @@
         <span *ngIf="(isProcessingDelete() | async)">
             <i class='fas fa-circle-notch fa-spin'></i> {{'researcher.profile.action.processing' | translate}}
         </span>
-        <span *ngIf="!(isProcessingDelete() | async)">
+        <span *ngIf="(isProcessingDelete()  | async) === false">
             <i class="fas fa-trash-alt"></i> &nbsp;{{'researcher.profile.delete' | translate}}
         </span>
     </button>
diff --git a/src/app/register-email-form/register-email-form.component.html b/src/app/register-email-form/register-email-form.component.html
index ed79b1d2d1..e87724df03 100644
--- a/src/app/register-email-form/register-email-form.component.html
+++ b/src/app/register-email-form/register-email-form.component.html
@@ -47,7 +47,7 @@
                            (showNotification)="showNotification($event)"></ds-google-recaptcha>
     </div>
 
-    <ng-container *ngIf="!((googleRecaptchaService.captchaVersion() | async) === 'v2' && (googleRecaptchaService.captchaMode() | async) === 'invisible'); else v2Invisible">
+    <ng-container *ngIf="((googleRecaptchaService.captchaVersion() | async) !== 'v2' && (googleRecaptchaService.captchaMode() | async) === 'invisible'); else v2Invisible">
       <button class="btn btn-primary" [disabled]="form.invalid || registrationVerification && !isRecaptchaCookieAccepted() || disableUntilChecked" (click)="register()">
         {{ MESSAGE_PREFIX + '.submit' | translate }}
       </button>
diff --git a/src/app/root/root.component.html b/src/app/root/root.component.html
index bf49e507c0..ae05220df2 100644
--- a/src/app/root/root.component.html
+++ b/src/app/root/root.component.html
@@ -1,5 +1,5 @@
 <div class="outer-wrapper" [class.d-none]="shouldShowFullscreenLoader" [@slideSidebarPadding]="{
-     value: (!(sidebarVisible | async) ? 'hidden' : (slideSidebarOver | async) ? 'shown' : 'expanded'),
+     value: ((sidebarVisible | async) === false ? 'hidden' : (slideSidebarOver | async) ? 'shown' : 'expanded'),
      params: {collapsedSidebarWidth: (collapsedSidebarWidth | async), totalSidebarWidth: (totalSidebarWidth | async)}
     }">
   <ds-themed-admin-sidebar></ds-themed-admin-sidebar>
diff --git a/src/app/shared/auth-nav-menu/auth-nav-menu.component.html b/src/app/shared/auth-nav-menu/auth-nav-menu.component.html
index 05f502afa1..22720133a4 100644
--- a/src/app/shared/auth-nav-menu/auth-nav-menu.component.html
+++ b/src/app/shared/auth-nav-menu/auth-nav-menu.component.html
@@ -1,5 +1,5 @@
 <ul class="navbar-nav" [ngClass]="{'mr-auto': (isXsOrSm$ | async)}">
-  <li *ngIf="!(isAuthenticated | async) && !(isXsOrSm$ | async) && (showAuth | async)" class="nav-item"
+  <li *ngIf="(isAuthenticated | async) === false && (isXsOrSm$ | async) === false && (showAuth | async)" class="nav-item"
       (click)="$event.stopPropagation();">
     <div ngbDropdown #loginDrop display="dynamic" placement="bottom-right" class="d-inline-block" @fadeInOut>
       <a href="javascript:void(0);" class="dropdownLogin px-1" [attr.aria-label]="'nav.login' |translate"
@@ -12,12 +12,12 @@
       </div>
     </div>
   </li>
-  <li *ngIf="!(isAuthenticated | async) && (isXsOrSm$ | async)" class="nav-item">
+  <li *ngIf="(isAuthenticated | async) === false && (isXsOrSm$ | async)" class="nav-item">
     <a routerLink="/login" routerLinkActive="active" class="loginLink px-1">
       {{ 'nav.login' | translate }}<span class="sr-only">(current)</span>
     </a>
   </li>
-  <li *ngIf="(isAuthenticated | async) && !(isXsOrSm$ | async) && (showAuth | async)" class="nav-item">
+  <li *ngIf="(isAuthenticated | async) && (isXsOrSm$ | async) === false && (showAuth | async)" class="nav-item">
     <div ngbDropdown display="dynamic" placement="bottom-right" class="d-inline-block" @fadeInOut>
       <a href="javascript:void(0);" role="button" [attr.aria-label]="'nav.user-profile-menu-and-logout' |translate" (click)="$event.preventDefault()" [title]="'nav.user-profile-menu-and-logout' | translate" class="dropdownLogout px-1" [attr.data-test]="'user-menu' | dsBrowserOnly" ngbDropdownToggle>
         <i class="fas fa-user-circle fa-lg fa-fw"></i></a>
diff --git a/src/app/shared/auth-nav-menu/user-menu/user-menu.component.html b/src/app/shared/auth-nav-menu/user-menu/user-menu.component.html
index 85b9d8aece..00020a7d52 100644
--- a/src/app/shared/auth-nav-menu/user-menu/user-menu.component.html
+++ b/src/app/shared/auth-nav-menu/user-menu/user-menu.component.html
@@ -1,5 +1,5 @@
 <ds-themed-loading *ngIf="(loading$ | async)"></ds-themed-loading>
-<div *ngIf="!(loading$ | async)">
+<div *ngIf="(loading$ | async) === false">
   <span class="dropdown-item-text" [class.pl-0]="inExpandableNavbar">
     {{dsoNameService.getName(user$ | async)}}<br>
     <span class="text-muted">{{(user$ | async)?.email}}</span>
diff --git a/src/app/shared/collection-dropdown/collection-dropdown.component.html b/src/app/shared/collection-dropdown/collection-dropdown.component.html
index 470291373f..39d6e76b2c 100644
--- a/src/app/shared/collection-dropdown/collection-dropdown.component.html
+++ b/src/app/shared/collection-dropdown/collection-dropdown.component.html
@@ -18,7 +18,7 @@
      [scrollWindow]="false"
      (scrolled)="onScrollDown()">
 
-  <li class="dropdown-item disabled" *ngIf="searchListCollection?.length == 0 && !(isLoading | async)">
+  <li class="dropdown-item disabled" *ngIf="searchListCollection?.length == 0 && (isLoading | async) === false">
     {{'submission.sections.general.no-collection' | translate}}
   </li>
   <ng-container *ngIf="searchListCollection?.length > 0">
diff --git a/src/app/shared/comcol/comcol-forms/edit-comcol-page/comcol-role/comcol-role.component.html b/src/app/shared/comcol/comcol-forms/edit-comcol-page/comcol-role/comcol-role.component.html
index 1e1f3d8209..fdefcd5f7d 100644
--- a/src/app/shared/comcol/comcol-forms/edit-comcol-page/comcol-role/comcol-role.component.html
+++ b/src/app/shared/comcol/comcol-forms/edit-comcol-page/comcol-role/comcol-role.component.html
@@ -13,7 +13,7 @@
 
     <div class="d-flex flex-md-row justify-content-between flex-column">
       <div class="w-100 d-flex align-items-center">
-        <ds-themed-loading *ngIf="!(groupRD$ | async)"></ds-themed-loading>
+        <ds-themed-loading *ngIf="(groupRD$ | async) === null"></ds-themed-loading>
         <div *ngIf="hasNoGroup$ | async">
           {{'comcol-role.edit.no-group' | translate}}
         </div>
diff --git a/src/app/shared/entity-dropdown/entity-dropdown.component.html b/src/app/shared/entity-dropdown/entity-dropdown.component.html
index a4d539625f..48859c36ce 100644
--- a/src/app/shared/entity-dropdown/entity-dropdown.component.html
+++ b/src/app/shared/entity-dropdown/entity-dropdown.component.html
@@ -9,7 +9,7 @@
     [fromRoot]="true"
     [scrollWindow]="false"
     (scrolled)="onScrollDown()">
-    <button class="dropdown-item disabled" *ngIf="searchListEntity?.length == 0 && !(isLoadingList | async)">
+    <button class="dropdown-item disabled" *ngIf="searchListEntity?.length == 0 && (isLoadingList | async) === false">
       {{'submission.sections.general.no-entity' | translate}}
     </button>
     <button *ngFor="let listItem of searchListEntity"
diff --git a/src/app/shared/file-download-link/file-download-link.component.html b/src/app/shared/file-download-link/file-download-link.component.html
index 8ebe622a5b..589f0381fb 100644
--- a/src/app/shared/file-download-link/file-download-link.component.html
+++ b/src/app/shared/file-download-link/file-download-link.component.html
@@ -1,5 +1,5 @@
 <a [routerLink]="(bitstreamPath$| async)?.routerLink" class="dont-break-out" [queryParams]="(bitstreamPath$| async)?.queryParams" [target]="isBlank ? '_blank': '_self'" [ngClass]="cssClasses">
-  <span *ngIf="!(canDownload$ |async)" class="pr-1"><i class="fas fa-lock"></i></span>
+  <span *ngIf="(canDownload$  | async) === false" class="pr-1"><i class="fas fa-lock"></i></span>
   <ng-container *ngTemplateOutlet="content"></ng-container>
 </a>
 
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component.html b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component.html
index 62d34a8625..001e0bc339 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component.html
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component.html
@@ -1,6 +1,6 @@
 <div class="d-flex">
     <span class="mr-auto text-contents">
-        <ng-container *ngIf="!(metadataRepresentation$ | async)">
+        <ng-container *ngIf="(metadataRepresentation$ | async) === undefined">
             <ds-themed-loading [showMessage]="false"></ds-themed-loading>
         </ng-container>
         <ng-container *ngIf="(metadataRepresentation$ | async)">
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.html b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.html
index 64ace2296e..5a5bd2ff2a 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.html
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.html
@@ -1,6 +1,6 @@
 <div class="d-flex">
     <div class="flex-grow-1 mr-auto">
-        <ng-container *ngIf="!(relatedItem$ | async)">
+        <ng-container *ngIf="(relatedItem$ | async) === undefined">
             <ds-themed-loading [showMessage]="false"></ds-themed-loading>
         </ng-container>
         <ng-container *ngIf="(relatedItem$ | async)">
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/models/onebox/dynamic-onebox.component.html b/src/app/shared/form/builder/ds-dynamic-form-ui/models/onebox/dynamic-onebox.component.html
index 3c19ecda13..9f6291a9c5 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/models/onebox/dynamic-onebox.component.html
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/models/onebox/dynamic-onebox.component.html
@@ -20,7 +20,7 @@
   </ul>
 </ng-template>
 
-<div *ngIf="!(isHierarchicalVocabulary() | async)" class="position-relative right-addon">
+<div *ngIf="(isHierarchicalVocabulary()  | async) === false" class="position-relative right-addon">
   <i *ngIf="searching" class="fas fa-circle-notch fa-spin fa-2x fa-fw text-primary position-absolute mt-1 p-0" aria-hidden="true"></i>
   <i *ngIf="!searching"
      dsAuthorityConfidenceState
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/models/relation-group/dynamic-relation-group.component.html b/src/app/shared/form/builder/ds-dynamic-form-ui/models/relation-group/dynamic-relation-group.component.html
index 05f443aad5..b599ad09ff 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/models/relation-group/dynamic-relation-group.component.html
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/models/relation-group/dynamic-relation-group.component.html
@@ -1,4 +1,4 @@
-<a *ngIf="!(formCollapsed | async)"
+<a *ngIf="(formCollapsed | async) === false"
    class="close position-relative"
    ngbTooltip="{{'form.group-collapse-help' | translate}}"
    placement="left">
@@ -16,7 +16,7 @@
 </a>
 
 <div class="pt-2" [ngClass]="{'border-top': !showErrorMessages, 'border border-danger': showErrorMessages}">
-  <div *ngIf="!(formCollapsed | async)" class="pl-2 row"  @shrinkInOut>
+  <div *ngIf="(formCollapsed | async) === false" class="pl-2 row"  @shrinkInOut>
     <ds-form #formRef="formComponent"
              class="col-sm-12 col-md-8 col-lg-9 col-xl-10 pl-0"
              [formId]="formId"
@@ -28,7 +28,7 @@
              (dfFocus)="onFocus($event)"></ds-form>
 
 
-    <div *ngIf="!(formCollapsed | async)" class="col p-0 m-0 d-flex justify-content-center align-items-center">
+    <div *ngIf="(formCollapsed | async) === false" class="col p-0 m-0 d-flex justify-content-center align-items-center">
 
         <button type="button"
                 class="btn btn-link"
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.html b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.html
index 17aafae5eb..a675880bea 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.html
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/search-tab/dynamic-lookup-relation-search-tab.component.html
@@ -22,7 +22,7 @@
                Checkboxes that are in the indeterminate state always switch to checked when clicked
                This seemed like the cleanest and clearest solution to solve this issue for now. -->
 
-          <input *ngIf="!allSelected && !(someSelected$ | async)"
+          <input *ngIf="!allSelected && (someSelected$ | async) === false"
                  type="checkbox"
                  [indeterminate]="false"
                  (change)="selectAll()">
diff --git a/src/app/shared/form/form.component.html b/src/app/shared/form/form.component.html
index 1b27c9d308..8fa5e77866 100644
--- a/src/app/shared/form/form.component.html
+++ b/src/app/shared/form/form.component.html
@@ -62,7 +62,7 @@
             </button>
             <ng-content select="[between]"></ng-content>
             <button *ngIf="displaySubmit" type="submit" class="btn btn-primary" (click)="onSubmit()"
-                    [disabled]="!(isValid() | async)"><i class="fas fa-save"></i> {{submitLabel | translate}}
+                    [disabled]="(isValid()  | async) === false"><i class="fas fa-save"></i> {{submitLabel | translate}}
             </button>
             <ng-content select="[after]"></ng-content>
         </div>
diff --git a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html
index fb7d162008..6a4da99fd0 100644
--- a/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html
+++ b/src/app/shared/form/vocabulary-treeview/vocabulary-treeview.component.html
@@ -16,7 +16,7 @@
 </div>
 <div class="treeview-container">
   <ds-themed-loading *ngIf="loading | async" [showMessage]="false"></ds-themed-loading>
-  <h4 *ngIf="!(loading | async) && dataSource.data.length === 0" class="text-center text-muted mt-4" >
+  <h4 *ngIf="(loading | async) === false && dataSource.data.length === 0" class="text-center text-muted mt-4" >
     <span>{{'vocabulary-treeview.search.no-result' | translate}}</span>
   </h4>
   <cdk-tree [dataSource]="dataSource" [treeControl]="treeControl">
diff --git a/src/app/shared/log-in/log-in.component.html b/src/app/shared/log-in/log-in.component.html
index 6b1fdb9ff6..1aaba13e7d 100644
--- a/src/app/shared/log-in/log-in.component.html
+++ b/src/app/shared/log-in/log-in.component.html
@@ -1,5 +1,5 @@
 <ds-themed-loading *ngIf="(loading | async) || (isAuthenticated | async)" class="m-5"></ds-themed-loading>
-<div *ngIf="!(loading | async) && !(isAuthenticated | async)" class="px-4 py-3 mx-auto login-container">
+<div *ngIf="(loading | async) === false && (isAuthenticated | async) === false" class="px-4 py-3 mx-auto login-container">
   <ng-container *ngFor="let authMethod of (authMethods); let i = index">
     <div *ngIf="i === 1" class="text-center mt-2">
       <span class="align-middle">{{"login.form.or-divider" | translate}}</span>
diff --git a/src/app/shared/mydspace-actions/claimed-task/approve/claimed-task-actions-approve.component.html b/src/app/shared/mydspace-actions/claimed-task/approve/claimed-task-actions-approve.component.html
index 7944d24d96..a132ba2c3a 100644
--- a/src/app/shared/mydspace-actions/claimed-task/approve/claimed-task-actions-approve.component.html
+++ b/src/app/shared/mydspace-actions/claimed-task/approve/claimed-task-actions-approve.component.html
@@ -4,5 +4,5 @@
         [disabled]="processing$ | async"
         (click)="submitTask()">
   <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-  <span *ngIf="!(processing$ | async)"><i class="fa fa-thumbs-up"></i> {{'submission.workflow.tasks.claimed.approve' | translate}}</span>
+  <span *ngIf="(processing$ | async) === false"><i class="fa fa-thumbs-up"></i> {{'submission.workflow.tasks.claimed.approve' | translate}}</span>
 </button>
diff --git a/src/app/shared/mydspace-actions/claimed-task/decline-task/claimed-task-actions-decline-task.component.html b/src/app/shared/mydspace-actions/claimed-task/decline-task/claimed-task-actions-decline-task.component.html
index 38ed36c0f1..0067bba049 100644
--- a/src/app/shared/mydspace-actions/claimed-task/decline-task/claimed-task-actions-decline-task.component.html
+++ b/src/app/shared/mydspace-actions/claimed-task/decline-task/claimed-task-actions-decline-task.component.html
@@ -6,7 +6,7 @@
   <span *ngIf="processing$ | async">
     <i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}
   </span>
-  <span *ngIf="!(processing$ | async)">
+  <span *ngIf="(processing$ | async) === false">
     <i class="fa fa-ban"></i> {{'submission.workflow.tasks.claimed.decline' | translate}}
   </span>
 </button>
diff --git a/src/app/shared/mydspace-actions/claimed-task/reject/claimed-task-actions-reject.component.html b/src/app/shared/mydspace-actions/claimed-task/reject/claimed-task-actions-reject.component.html
index 0cb2871bf5..855fba9898 100644
--- a/src/app/shared/mydspace-actions/claimed-task/reject/claimed-task-actions-reject.component.html
+++ b/src/app/shared/mydspace-actions/claimed-task/reject/claimed-task-actions-reject.component.html
@@ -4,7 +4,7 @@
         [disabled]="processing$ | async"
         (click)="openRejectModal(rejectModal)" >
   <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-  <span *ngIf="!(processing$ | async)"><i class="fa fa-trash"></i> {{'submission.workflow.tasks.claimed.reject.submit' | translate}}</span>
+  <span *ngIf="(processing$ | async) === false"><i class="fa fa-trash"></i> {{'submission.workflow.tasks.claimed.reject.submit' | translate}}</span>
 </button>
 
 <ng-template #rejectModal let-c="close" let-d="dismiss">
@@ -31,7 +31,7 @@
               [disabled]="!rejectForm.valid || (processing$ | async)"
               type="submit">
         <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-        <span *ngIf="!(processing$ | async)">{{'submission.workflow.tasks.claimed.reject.reason.submit' | translate}}</span>
+        <span *ngIf="(processing$ | async) === false">{{'submission.workflow.tasks.claimed.reject.reason.submit' | translate}}</span>
       </button>
     </form>
   </div>
diff --git a/src/app/shared/mydspace-actions/claimed-task/return-to-pool/claimed-task-actions-return-to-pool.component.html b/src/app/shared/mydspace-actions/claimed-task/return-to-pool/claimed-task-actions-return-to-pool.component.html
index 66f8e2a058..5311d9b48e 100644
--- a/src/app/shared/mydspace-actions/claimed-task/return-to-pool/claimed-task-actions-return-to-pool.component.html
+++ b/src/app/shared/mydspace-actions/claimed-task/return-to-pool/claimed-task-actions-return-to-pool.component.html
@@ -4,5 +4,5 @@
         [disabled]="processing$ | async"
         (click)="submitTask()">
   <span *ngIf="processing$ | async"><i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-  <span *ngIf="!(processing$ | async)"><i class="fa fa-undo"></i> {{'submission.workflow.tasks.claimed.return' | translate}}</span>
+  <span *ngIf="(processing$ | async) === false"><i class="fa fa-undo"></i> {{'submission.workflow.tasks.claimed.return' | translate}}</span>
 </button>
diff --git a/src/app/shared/mydspace-actions/pool-task/pool-task-actions.component.html b/src/app/shared/mydspace-actions/pool-task/pool-task-actions.component.html
index 9d63a42d03..03c433e3d3 100644
--- a/src/app/shared/mydspace-actions/pool-task/pool-task-actions.component.html
+++ b/src/app/shared/mydspace-actions/pool-task/pool-task-actions.component.html
@@ -3,7 +3,7 @@
   (click)="claim()">
   <span *ngIf="(processing$ | async)"><i class='fas fa-circle-notch fa-spin'></i>
     {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-  <span *ngIf="!(processing$ | async)"><i class="fas fa-hand-paper"></i> {{'submission.workflow.tasks.pool.claim' |
+  <span *ngIf="(processing$ | async) === false"><i class="fas fa-hand-paper"></i> {{'submission.workflow.tasks.pool.claim' |
     translate}}</span>
 </button>
 <button class="btn btn-primary workflow-view ml-1 mt-1 mb-3" data-test="view-btn"
diff --git a/src/app/shared/mydspace-actions/workspaceitem/workspaceitem-actions.component.html b/src/app/shared/mydspace-actions/workspaceitem/workspaceitem-actions.component.html
index 6e958c7a8b..f2b28a0442 100644
--- a/src/app/shared/mydspace-actions/workspaceitem/workspaceitem-actions.component.html
+++ b/src/app/shared/mydspace-actions/workspaceitem/workspaceitem-actions.component.html
@@ -22,7 +22,7 @@
     (click)="$event.preventDefault();confirmDiscard(content)">
     <span *ngIf="(processingDelete$ | async)"><i class='fas fa-circle-notch fa-spin'></i>
       {{'submission.workflow.tasks.generic.processing' | translate}}</span>
-    <span *ngIf="!(processingDelete$ | async)"><i class="fa fa-trash"></i> {{'submission.workflow.generic.delete' |
+    <span *ngIf="(processingDelete$ | async) === false"><i class="fa fa-trash"></i> {{'submission.workflow.generic.delete' |
       translate}}</span>
   </button>
 </div>
diff --git a/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.html b/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.html
index ffc3df53f8..2b4d60bb24 100644
--- a/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.html
+++ b/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.html
@@ -11,5 +11,5 @@
 </ng-container>
 
 <ds-themed-loading
-        *ngIf="!(derivedSearchResult$ | async)"
+        *ngIf="(derivedSearchResult$ | async) === undefined"
         [showMessage]="false"></ds-themed-loading>
diff --git a/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.ts b/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.ts
index 6218f69490..1e2e1c8118 100644
--- a/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.ts
+++ b/src/app/shared/object-list/my-dspace-result-list-element/workflow-item-search-result/workflow-item-search-result-list-element.component.ts
@@ -1,7 +1,6 @@
 import { Component, Inject } from '@angular/core';
 
-import { Observable } from 'rxjs';
-import { map } from 'rxjs/operators';
+import { BehaviorSubject } from 'rxjs';
 import { LinkService } from '../../../../core/cache/builders/link.service';
 import { Item } from '../../../../core/shared/item.model';
 
@@ -37,7 +36,7 @@ export class WorkflowItemSearchResultListElementComponent extends SearchResultLi
   /**
    * The item search result derived from the WorkspaceItemSearchResult
    */
-  derivedSearchResult$: Observable<ItemSearchResult>;
+  derivedSearchResult$: BehaviorSubject<ItemSearchResult> = new BehaviorSubject(undefined);
 
   /**
    * Represents the badge context
@@ -69,13 +68,14 @@ export class WorkflowItemSearchResultListElementComponent extends SearchResultLi
 
   private deriveSearchResult() {
     this.linkService.resolveLink(this.object.indexableObject, followLink('item'));
-    this.derivedSearchResult$ = this.object.indexableObject.item.pipe(
+    this.object.indexableObject.item.pipe(
       getFirstSucceededRemoteDataPayload(),
-      map((item: Item) => {
-        const result = new ItemSearchResult();
-        result.indexableObject = item;
-        result.hitHighlights = this.object.hitHighlights;
-        return result;
+    ).subscribe((item: Item) => {
+      const result = new ItemSearchResult();
+      this.derivedSearchResult$.next(Object.assign(new ItemSearchResult(), {
+        indexableObject: item,
+        hitHighlights: this.object.hitHighlights,
       }));
+    });
   }
 }
diff --git a/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.html b/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.html
index 724db2892d..2363c837a3 100644
--- a/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.html
+++ b/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.html
@@ -10,5 +10,5 @@
     </div>
 </ng-container>
 <ds-themed-loading
-        *ngIf="!(derivedSearchResult$ | async)"
+        *ngIf="(derivedSearchResult$ | async) === undefined"
         [showMessage]="false"></ds-themed-loading>
diff --git a/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.ts b/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.ts
index 7ff9a2ef3d..8e9dffbd09 100644
--- a/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.ts
+++ b/src/app/shared/object-list/my-dspace-result-list-element/workspace-item-search-result/workspace-item-search-result-list-element.component.ts
@@ -1,6 +1,6 @@
 import { Component, Inject } from '@angular/core';
 
-import { Observable } from 'rxjs';
+import { BehaviorSubject } from 'rxjs';
 import { LinkService } from '../../../../core/cache/builders/link.service';
 import { Item } from '../../../../core/shared/item.model';
 
@@ -13,7 +13,6 @@ import { SearchResultListElementComponent } from '../../search-result-list-eleme
 import { DSONameService } from '../../../../core/breadcrumbs/dso-name.service';
 import { APP_CONFIG, AppConfig } from '../../../../../config/app-config.interface';
 import { ItemSearchResult } from '../../../object-collection/shared/item-search-result.model';
-import { map } from 'rxjs/operators';
 import { getFirstSucceededRemoteDataPayload } from '../../../../core/shared/operators';
 import { CollectionElementLinkType } from '../../../object-collection/collection-element-link.type';
 import { followLink } from '../../../utils/follow-link-config.model';
@@ -37,7 +36,7 @@ export class  WorkspaceItemSearchResultListElementComponent extends SearchResult
   /**
    * The item search result derived from the WorkspaceItemSearchResult
    */
-  derivedSearchResult$: Observable<ItemSearchResult>;
+  derivedSearchResult$: BehaviorSubject<ItemSearchResult> = new BehaviorSubject(undefined);
 
   /**
    * Represents the badge context
@@ -69,13 +68,14 @@ export class  WorkspaceItemSearchResultListElementComponent extends SearchResult
 
   private deriveSearchResult() {
     this.linkService.resolveLink(this.object.indexableObject, followLink('item'));
-    this.derivedSearchResult$ = this.object.indexableObject.item.pipe(
+    this.object.indexableObject.item.pipe(
       getFirstSucceededRemoteDataPayload(),
-      map((item: Item) => {
+    ).subscribe((item: Item) => {
       const result = new ItemSearchResult();
-      result.indexableObject = item;
-      result.hitHighlights = this.object.hitHighlights;
-      return result;
-    }));
+      this.derivedSearchResult$.next(Object.assign(new ItemSearchResult(), {
+        indexableObject: item,
+        hitHighlights: this.object.hitHighlights,
+      }));
+    });
   }
 }
diff --git a/src/app/shared/object-select/item-select/item-select.component.html b/src/app/shared/object-select/item-select/item-select.component.html
index 7f8ff943a3..97bddc2969 100644
--- a/src/app/shared/object-select/item-select/item-select.component.html
+++ b/src/app/shared/object-select/item-select/item-select.component.html
@@ -19,7 +19,7 @@
         </thead>
         <tbody>
         <tr *ngFor="let item of itemsRD?.payload?.page">
-          <td><input [disabled]="!(canSelect(item) | async)" class="item-checkbox" [ngModel]="getSelected(item.id) | async" (change)="switch(item.id)" type="checkbox" name="{{item.id}}"></td>
+          <td><input [disabled]="(canSelect(item)  | async) === false" class="item-checkbox" [ngModel]="getSelected(item.id) | async" (change)="switch(item.id)" type="checkbox" name="{{item.id}}"></td>
           <td *ngIf="!hideCollection">
             <span *ngVar="(item.owningCollection | async)?.payload as collection">
               <a *ngIf="collection" [routerLink]="['/collections', collection?.id]">
diff --git a/src/app/shared/resource-policies/form/resource-policy-form.component.html b/src/app/shared/resource-policies/form/resource-policy-form.component.html
index 66c1fc400e..c17987306e 100644
--- a/src/app/shared/resource-policies/form/resource-policy-form.component.html
+++ b/src/app/shared/resource-policies/form/resource-policy-form.component.html
@@ -35,12 +35,12 @@
                   (click)="onReset()">{{'form.cancel' | translate}}</button>
           <button type="button"
                   class="btn btn-primary"
-                  [disabled]="!(isFormValid() | async) || (isProcessing | async)"
+                  [disabled]="(isFormValid()  | async) === false || (isProcessing | async)"
                   (click)="onSubmit()">
             <span *ngIf="(isProcessing | async)">
                   <i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}
                 </span>
-            <span *ngIf="!(isProcessing | async)">
+            <span *ngIf="(isProcessing | async) === false">
                   {{'form.submit' | translate}}
                 </span>
           </button>
diff --git a/src/app/shared/resource-policies/resource-policies.component.html b/src/app/shared/resource-policies/resource-policies.component.html
index 277f6e4998..83897900f4 100644
--- a/src/app/shared/resource-policies/resource-policies.component.html
+++ b/src/app/shared/resource-policies/resource-policies.component.html
@@ -13,13 +13,13 @@
             </span>
             <div class="space-children-mr flex-shrink-0">
               <button class="btn btn-danger p-1"
-                      [disabled]="(!(canDelete() | async)) || (isProcessingDelete() | async)"
+                      [disabled]="((canDelete()  | async) === false) || (isProcessingDelete() | async)"
                       [title]="'resource-policies.delete.btn.title' | translate"
                       (click)="deleteSelectedResourcePolicies()">
                 <span *ngIf="(isProcessingDelete() | async)">
                   <i class='fas fa-circle-notch fa-spin'></i> {{'submission.workflow.tasks.generic.processing' | translate}}
                 </span>
-                <span *ngIf="!(isProcessingDelete() | async)">
+                <span *ngIf="(isProcessingDelete()  | async) === false">
                   <i class='fas fa-trash-alt fa-fw'></i>
                   {{'resource-policies.delete.btn' | translate}}
                 </span>
diff --git a/src/app/shared/search/search-filters/search-filter/search-authority-filter/search-authority-filter.component.html b/src/app/shared/search/search-filters/search-filter/search-authority-filter/search-authority-filter.component.html
index fdf154bc04..28cf3cb514 100644
--- a/src/app/shared/search/search-filters/search-filter/search-authority-filter/search-authority-filter.component.html
+++ b/src/app/shared/search/search-filters/search-filter/search-authority-filter/search-authority-filter.component.html
@@ -7,7 +7,7 @@
           </div>
         </ng-container>
         <div class="clearfix toggle-more-filters">
-            <a class="float-left" *ngIf="!(isLastPage$ | async)"
+            <a class="float-left" *ngIf="(isLastPage$ | async) === false"
                (click)="showMore()" href="javascript:void(0);">
               {{"search.filters.filter.show-more" | translate}}
             </a>
diff --git a/src/app/shared/search/search-filters/search-filter/search-boolean-filter/search-boolean-filter.component.html b/src/app/shared/search/search-filters/search-filter/search-boolean-filter/search-boolean-filter.component.html
index 7d0ad89914..147a0260f1 100644
--- a/src/app/shared/search/search-filters/search-filter/search-boolean-filter/search-boolean-filter.component.html
+++ b/src/app/shared/search/search-filters/search-filter/search-boolean-filter/search-boolean-filter.component.html
@@ -7,7 +7,7 @@
         </div>
         </ng-container>
         <div class="clearfix toggle-more-filters">
-            <a class="float-left" *ngIf="!(isLastPage$ | async)"
+            <a class="float-left" *ngIf="(isLastPage$ | async) === false"
                (click)="showMore()" href="javascript:void(0);">
               {{"search.filters.filter.show-more" | translate}}
             </a>
diff --git a/src/app/shared/search/search-filters/search-filter/search-hierarchy-filter/search-hierarchy-filter.component.html b/src/app/shared/search/search-filters/search-filter/search-hierarchy-filter/search-hierarchy-filter.component.html
index eb49235641..9bfab9bd06 100644
--- a/src/app/shared/search/search-filters/search-filter/search-hierarchy-filter/search-hierarchy-filter.component.html
+++ b/src/app/shared/search/search-filters/search-filter/search-hierarchy-filter/search-hierarchy-filter.component.html
@@ -7,7 +7,7 @@
           </div>
         </ng-container>
         <div class="clearfix toggle-more-filters">
-            <a class="float-left" *ngIf="!(isLastPage$ | async)"
+            <a class="float-left" *ngIf="(isLastPage$ | async) === false"
                (click)="showMore()" href="javascript:void(0);">
               {{"search.filters.filter.show-more" | translate}}
             </a>
diff --git a/src/app/shared/search/search-filters/search-filter/search-text-filter/search-text-filter.component.html b/src/app/shared/search/search-filters/search-filter/search-text-filter/search-text-filter.component.html
index fdf154bc04..28cf3cb514 100644
--- a/src/app/shared/search/search-filters/search-filter/search-text-filter/search-text-filter.component.html
+++ b/src/app/shared/search/search-filters/search-filter/search-text-filter/search-text-filter.component.html
@@ -7,7 +7,7 @@
           </div>
         </ng-container>
         <div class="clearfix toggle-more-filters">
-            <a class="float-left" *ngIf="!(isLastPage$ | async)"
+            <a class="float-left" *ngIf="(isLastPage$ | async) === false"
                (click)="showMore()" href="javascript:void(0);">
               {{"search.filters.filter.show-more" | translate}}
             </a>
diff --git a/src/app/shared/search/search.component.html b/src/app/shared/search/search.component.html
index d43f506866..9cfe854553 100644
--- a/src/app/shared/search/search.component.html
+++ b/src/app/shared/search/search.component.html
@@ -16,7 +16,7 @@
 
 <ng-template #searchContent>
     <div class="row">
-        <div class="col-12" *ngIf="!(isXsOrSm$ | async)">
+        <div class="col-12" *ngIf="(isXsOrSm$ | async) === false">
             <ng-template *ngTemplateOutlet="searchForm"></ng-template>
             <ng-content select="[additionalSearchOptions]"></ng-content>
         </div>
@@ -47,7 +47,7 @@
 </ng-template>
 
 <ng-template #sidebarContent>
-    <ds-themed-search-sidebar id="search-sidebar" *ngIf="!(isXsOrSm$ | async)"
+    <ds-themed-search-sidebar id="search-sidebar" *ngIf="(isXsOrSm$ | async) === false"
                        [configurationList]="configurationList"
                        [configuration]="(currentConfiguration$ | async)"
                        [currentScope]="(currentScope$ | async)"
diff --git a/src/app/shared/subscriptions/subscription-modal/subscription-modal.component.html b/src/app/shared/subscriptions/subscription-modal/subscription-modal.component.html
index 287175bfa1..fbb8fd50dc 100644
--- a/src/app/shared/subscriptions/subscription-modal/subscription-modal.component.html
+++ b/src/app/shared/subscriptions/subscription-modal/subscription-modal.component.html
@@ -38,7 +38,7 @@
         <span *ngIf="(processing$ | async)">
           <i class='fas fa-circle-notch fa-spin'></i> {{'subscriptions.modal.new-subscription-form.processing' | translate}}
         </span>
-      <span *ngIf="!(processing$ | async)">
+      <span *ngIf="(processing$ | async) === false">
         {{'subscriptions.modal.new-subscription-form.submit' | translate}}
       </span>
     </button>
diff --git a/src/app/statistics-page/statistics-page/statistics-page.component.html b/src/app/statistics-page/statistics-page/statistics-page.component.html
index c6938c7582..481aa5280e 100644
--- a/src/app/statistics-page/statistics-page/statistics-page.component.html
+++ b/src/app/statistics-page/statistics-page/statistics-page.component.html
@@ -19,7 +19,7 @@
                            [report]="report"
                            class="m-2 {{ report.id }}">
       </ds-statistics-table>
-      <div *ngIf="!(hasData$ | async)">
+      <div *ngIf="(hasData$ | async) === false">
         {{ 'statistics.page.no-data' | translate }}
       </div>
     </ng-container>
diff --git a/src/app/submission/form/collection/submission-form-collection.component.html b/src/app/submission/form/collection/submission-form-collection.component.html
index a78d737640..79be0a8585 100644
--- a/src/app/submission/form/collection/submission-form-collection.component.html
+++ b/src/app/submission/form/collection/submission-form-collection.component.html
@@ -1,6 +1,6 @@
 <div>
   <div
-    *ngIf="!(available$ | async)"
+    *ngIf="(available$ | async) === false"
     class="input-group mb-3">
     <div class="input-group-prepend">
       <span class="input-group-text">{{ 'submission.sections.general.collection' | translate }}</span>
@@ -28,7 +28,7 @@
             [disabled]="(processingChange$ | async) || collectionModifiable == false || isReadonly"
             ngbDropdownToggle>
       <span *ngIf="(processingChange$ | async)"><i class='fas fa-circle-notch fa-spin'></i></span>
-      <span *ngIf="!(processingChange$ | async)">{{ selectedCollectionName$ | async }}</span>
+      <span *ngIf="(processingChange$ | async) === false">{{ selectedCollectionName$ | async }}</span>
     </button>
 
     <div ngbDropdownMenu
diff --git a/src/app/submission/form/footer/submission-form-footer.component.html b/src/app/submission/form/footer/submission-form-footer.component.html
index e898e1c220..fc27c268c1 100644
--- a/src/app/submission/form/footer/submission-form-footer.component.html
+++ b/src/app/submission/form/footer/submission-form-footer.component.html
@@ -11,10 +11,10 @@
     </button>
   </div>
   <div class="col text-right d-flex justify-content-end align-items-center">
-    <span *ngIf="!(hasUnsavedModification | async) && !(processingSaveStatus | async) && !(processingDepositStatus | async)">
+    <span *ngIf="(hasUnsavedModification | async) === false && (processingSaveStatus | async) === false && (processingDepositStatus | async) === false">
       <i class="fas fa-check-circle"></i> {{'submission.general.info.saved' | translate}}
     </span>
-    <span *ngIf="(hasUnsavedModification | async) && !(processingSaveStatus | async) && !(processingDepositStatus | async)">
+    <span *ngIf="(hasUnsavedModification | async) && (processingSaveStatus | async) === false && (processingDepositStatus | async) === false">
       <i class="fas fa-exclamation-circle"></i> {{'submission.general.info.pending-changes' | translate}}
     </span>
     <div *ngIf="(processingSaveStatus | async) || (processingDepositStatus | async)" class="col d-flex justify-content-end align-items-center">
@@ -28,12 +28,12 @@
               class="btn btn-secondary"
               id="save"
               [attr.data-test]="'save' | dsBrowserOnly"
-              [disabled]="(processingSaveStatus | async) || !(hasUnsavedModification | async)"
+              [disabled]="(processingSaveStatus | async) || (hasUnsavedModification | async) === false"
               (click)="save($event)">
         <span><i class="fas fa-save"></i> {{'submission.general.save' | translate}}</span>
       </button>
       <button type="button"
-              [class.btn-primary]="!(showDepositAndDiscard | async)"
+              [class.btn-primary]="(showDepositAndDiscard | async) === false"
               [class.btn-secondary]="(showDepositAndDiscard | async)"
               class="btn"
               id="saveForLater"
diff --git a/src/app/submission/form/section-add/submission-form-section-add.component.html b/src/app/submission/form/section-add/submission-form-section-add.component.html
index 939f23209a..3721212438 100644
--- a/src/app/submission/form/section-add/submission-form-section-add.component.html
+++ b/src/app/submission/form/section-add/submission-form-section-add.component.html
@@ -5,7 +5,7 @@
      [ngClass]="{'w-100': windowService.isXs()}">
   <button class="btn btn-outline-primary dropdown-toggle"
           id="sectionControls"
-          [disabled]="!(hasSections$ | async)"
+          [disabled]="(hasSections$ | async) === false"
           [ngClass]="{'w-100': (windowService.isXs() | async)}"
           ngbDropdownToggle>
           {{ 'submission.sections.general.add-more' | translate }} <i class="fa fa-plus" aria-hidden="true"></i>
@@ -14,7 +14,7 @@
        class="sections-dropdown-menu"
        aria-labelledby="sectionControls"
        [ngClass]="{'w-100': (windowService.isXs() | async)}">
-    <button class="dropdown-item disabled" *ngIf="!(hasSections$ | async)">
+    <button class="dropdown-item disabled" *ngIf="(hasSections$ | async) === false">
       {{ 'submission.sections.general.no-sections' | translate }}
     </button>
     <button class="dropdown-item" *ngFor="let listItem of (sectionList$ | async)" (click)="addSection(listItem.id)">
diff --git a/src/app/submission/form/submission-form.component.html b/src/app/submission/form/submission-form.component.html
index 4a916cfe23..4e90da5543 100644
--- a/src/app/submission/form/submission-form.component.html
+++ b/src/app/submission/form/submission-form.component.html
@@ -1,5 +1,5 @@
 <div class="container-fluid">
-    <div *ngIf="!(isLoading() | async)" class="submission-form-header mb-3 d-flex flex-wrap position-sticky">
+    <div *ngIf="(isLoading()  | async) === false" class="submission-form-header mb-3 d-flex flex-wrap position-sticky">
         <div *ngIf="(uploadEnabled$ | async)" class="w-100">
             <ds-submission-upload-files [submissionId]="submissionId"
                                         [collectionId]="collectionId"
@@ -33,7 +33,7 @@
                                              [sectionData]="object"></ds-submission-section-container>
         </ng-container>
     </div>
-    <div *ngIf="!(isLoading() | async)" class="submission-form-footer mt-3 mb-3 position-sticky">
+    <div *ngIf="(isLoading()  | async) === false" class="submission-form-footer mt-3 mb-3 position-sticky">
         <ds-submission-form-footer [submissionId]="submissionId"></ds-submission-form-footer>
     </div>
 </div>
diff --git a/src/app/submission/import-external/import-external-searchbar/submission-import-external-searchbar.component.html b/src/app/submission/import-external/import-external-searchbar/submission-import-external-searchbar.component.html
index 535395e534..45c5ddf35a 100644
--- a/src/app/submission/import-external/import-external-searchbar/submission-import-external-searchbar.component.html
+++ b/src/app/submission/import-external/import-external-searchbar/submission-import-external-searchbar.component.html
@@ -2,8 +2,8 @@
   <input type="text" class="form-control" (keyup.enter)="(searchString === '')?null:search()" [(ngModel)]="searchString" placeholder="{{'submission.import-external.search.placeholder' |translate}}" aria-label="" aria-describedby="">
 </div>
 <div class="input-group mb-5">
-  <input *ngIf="!(isXsOrSm$ | async)" type="text" class="form-control" (keyup.enter)="(searchString === '')?null:search()" [(ngModel)]="searchString" placeholder="{{'submission.import-external.search.placeholder' |translate}}" aria-label="" aria-describedby="">
-  <div [ngClass]="{'input-group-append': !(isXsOrSm$ | async)}" ngbDropdown role="group" aria-label="">
+  <input *ngIf="(isXsOrSm$ | async) === false" type="text" class="form-control" (keyup.enter)="(searchString === '')?null:search()" [(ngModel)]="searchString" placeholder="{{'submission.import-external.search.placeholder' |translate}}" aria-label="" aria-describedby="">
+  <div [ngClass]="{'input-group-append': (isXsOrSm$ | async) === false}" ngbDropdown role="group" aria-label="">
     <button class="btn btn-outline-secondary w-fx" title="{{'submission.import-external.search.source.hint' |translate}}" ngbDropdownToggle>{{'submission.import-external.source.' + selectedElement?.name | translate}}</button>
     <div ngbDropdownMenu class="dropdown-menu scrollable-dropdown-menu w-100"
       aria-haspopup="true"
diff --git a/src/app/submission/import-external/submission-import-external.component.html b/src/app/submission/import-external/submission-import-external.component.html
index dc46e6758f..9afa226524 100644
--- a/src/app/submission/import-external/submission-import-external.component.html
+++ b/src/app/submission/import-external/submission-import-external.component.html
@@ -12,7 +12,7 @@
     <div *ngIf="reload$.value.sourceId !== ''" class="col-md-12">
       <ng-container *ngVar="(entriesRD$ | async) as entriesRD">
         <h3 *ngIf="entriesRD && entriesRD?.payload?.page?.length !== 0">{{ 'submission.sections.describe.relationship-lookup.selection-tab.title' | translate}}</h3>
-        <ds-viewable-collection *ngIf="entriesRD?.hasSucceeded && !(isLoading$ | async) && entriesRD?.payload?.page?.length > 0" @fadeIn
+        <ds-viewable-collection *ngIf="entriesRD?.hasSucceeded && (isLoading$ | async) === false && entriesRD?.payload?.page?.length > 0" @fadeIn
                                 [objects]="entriesRD"
                                 [selectionConfig]="{ repeatable: repeatable, listId: listId }"
                                 [config]="initialPagination"
@@ -24,10 +24,10 @@
         </ds-viewable-collection>
         <ds-themed-loading *ngIf="(isLoading$ | async)"
                     message="{{'loading.search-results' | translate}}"></ds-themed-loading>
-        <div *ngIf="!(isLoading$ | async) && entriesRD?.payload?.page?.length === 0" data-test="empty-external-entry-list">
+        <div *ngIf="(isLoading$ | async) === false && entriesRD?.payload?.page?.length === 0" data-test="empty-external-entry-list">
           <ds-alert [type]="'alert-info'">{{ 'search.results.empty' | translate }}</ds-alert>
         </div>
-        <div *ngIf="!(isLoading$ | async) && entriesRD.statusCode === 500" data-test="empty-external-error-500">
+        <div *ngIf="(isLoading$ | async) === false && entriesRD.statusCode === 500" data-test="empty-external-error-500">
           <ds-alert [type]="'alert-info'">{{ 'search.results.response.500' | translate }}</ds-alert>
         </div>
       </ng-container>
diff --git a/src/app/submission/sections/container/section-container.component.html b/src/app/submission/sections/container/section-container.component.html
index e6ae9d1b9c..3173a656ca 100644
--- a/src/app/submission/sections/container/section-container.component.html
+++ b/src/app/submission/sections/container/section-container.component.html
@@ -9,7 +9,7 @@
           'submission.sections.'+sectionData.header | translate
           }}</span>
         <div class="d-inline-block float-right">
-          <i *ngIf="!(sectionRef.isValid() | async) && !(sectionRef.hasErrors()) && !(sectionRef.isInfo())"
+          <i *ngIf="(sectionRef.isValid()  | async) === false && !(sectionRef.hasErrors()) && !(sectionRef.isInfo())"
             class="fas fa-exclamation-circle text-warning mr-3"
             title="{{'submission.sections.status.warnings.title' | translate}}" role="img"
             [attr.aria-label]="'submission.sections.status.warnings.aria' | translate"></i>
@@ -48,4 +48,4 @@
       </ng-template>
     </ngb-panel>
   </ngb-accordion>
-</div>
\ No newline at end of file
+</div>
diff --git a/src/app/submission/sections/upload/file/section-upload-file.component.html b/src/app/submission/sections/upload/file/section-upload-file.component.html
index 8999853d72..42ca8d35d7 100644
--- a/src/app/submission/sections/upload/file/section-upload-file.component.html
+++ b/src/app/submission/sections/upload/file/section-upload-file.component.html
@@ -25,7 +25,7 @@
                   [disabled]="(processingDelete$ | async)"
                   (click)="$event.preventDefault();confirmDelete(content);">
             <i *ngIf="(processingDelete$ | async)" class="fas fa-circle-notch fa-spin fa-2x text-danger"></i>
-            <i *ngIf="!(processingDelete$ | async)" class="fa fa-trash fa-2x text-danger"></i>
+            <i *ngIf="(processingDelete$ | async) === false" class="fa fa-trash fa-2x text-danger"></i>
           </button>
         </ng-container>
       </div>
diff --git a/src/app/subscriptions-page/subscriptions-page.component.html b/src/app/subscriptions-page/subscriptions-page.component.html
index ed31e16759..4d425f927e 100644
--- a/src/app/subscriptions-page/subscriptions-page.component.html
+++ b/src/app/subscriptions-page/subscriptions-page.component.html
@@ -7,7 +7,7 @@
           <ds-themed-loading *ngIf="loading$ | async"></ds-themed-loading>
           <ng-container *ngVar="(subscriptions$ | async) as subscriptions">
 
-            <ds-pagination *ngIf="subscriptions?.pageInfo?.totalElements > 0 && !(loading$ | async)"
+            <ds-pagination *ngIf="subscriptions?.pageInfo?.totalElements > 0 && (loading$ | async) === false"
                            [paginationOptions]="config"
                            [collectionSize]="subscriptions?.pageInfo?.totalElements"
                            [hideGear]="true"
@@ -34,7 +34,7 @@
               </div>
             </ds-pagination>
 
-            <ds-alert *ngIf="subscriptions?.pageInfo?.totalElements == 0 && !(loading$ | async)" [type]="'alert-info'" data-test="empty-alert">
+            <ds-alert *ngIf="subscriptions?.pageInfo?.totalElements == 0 && (loading$ | async) === false" [type]="'alert-info'" data-test="empty-alert">
               {{ 'subscriptions.table.empty.message' | translate }}
             </ds-alert>
 
diff --git a/src/themes/dspace/app/header-nav-wrapper/header-navbar-wrapper.component.html b/src/themes/dspace/app/header-nav-wrapper/header-navbar-wrapper.component.html
index 091d152258..0fefd40a2a 100644
--- a/src/themes/dspace/app/header-nav-wrapper/header-navbar-wrapper.component.html
+++ b/src/themes/dspace/app/header-nav-wrapper/header-navbar-wrapper.component.html
@@ -1,3 +1,3 @@
-<div [ngClass]="{'open': !(isNavBarCollapsed | async)}">
+<div [ngClass]="{'open': (isNavBarCollapsed | async) === false}">
   <ds-themed-header></ds-themed-header>
 </div>
diff --git a/src/themes/dspace/app/navbar/navbar.component.html b/src/themes/dspace/app/navbar/navbar.component.html
index 05afac7d7e..a2b8d4d957 100644
--- a/src/themes/dspace/app/navbar/navbar.component.html
+++ b/src/themes/dspace/app/navbar/navbar.component.html
@@ -1,6 +1,6 @@
-<nav [ngClass]="{'open': !(menuCollapsed | async)}" [@slideMobileNav]="!(windowService.isXsOrSm() | async) ? 'default' : ((menuCollapsed | async) ? 'collapsed' : 'expanded')"
+<nav [ngClass]="{'open': (menuCollapsed | async) === false}" [@slideMobileNav]="(windowService.isXsOrSm()  | async) === false ? 'default' : ((menuCollapsed | async) ? 'collapsed' : 'expanded')"
   class="navbar navbar-expand-md navbar-light p-0 navbar-container" role="navigation" [attr.aria-label]="'nav.main.description' | translate">
-  <div class="navbar-inner-container w-100 h-100" [class.container]="!(isXsOrSm$ | async)">
+  <div class="navbar-inner-container w-100 h-100" [class.container]="(isXsOrSm$ | async) === false">
     <a class="navbar-brand my-2" routerLink="/home">
       <img src="assets/images/dspace-logo.svg" [attr.alt]="'menu.header.image.logo' | translate" />
     </a>