diff --git a/src/addons/block/recentlyaccesseditems/components/recentlyaccesseditems/addon-block-recentlyaccesseditems.html b/src/addons/block/recentlyaccesseditems/components/recentlyaccesseditems/addon-block-recentlyaccesseditems.html
index bdab2ad19..2b185a878 100644
--- a/src/addons/block/recentlyaccesseditems/components/recentlyaccesseditems/addon-block-recentlyaccesseditems.html
+++ b/src/addons/block/recentlyaccesseditems/components/recentlyaccesseditems/addon-block-recentlyaccesseditems.html
@@ -16,7 +16,7 @@
                 <ion-card>
                     <ion-item class="core-course-module-handler ion-text-wrap" detail="false" (click)="action($event, item)" button>
                         <core-mod-icon slot="start" *ngIf="item.iconUrl" [modicon]="item.iconUrl" [modname]="item.modname"
-                            [componentId]="item.cmid" [showAlt]="false">
+                            [componentId]="item.cmid" [showAlt]="false" [purpose]="item.purpose">
                         </core-mod-icon>
                         <ion-label>
                             <!-- Add the icon title so accessibility tools read it. -->
diff --git a/src/addons/block/recentlyaccesseditems/services/recentlyaccesseditems.ts b/src/addons/block/recentlyaccesseditems/services/recentlyaccesseditems.ts
index 1a1c3c65b..de78e4ea6 100644
--- a/src/addons/block/recentlyaccesseditems/services/recentlyaccesseditems.ts
+++ b/src/addons/block/recentlyaccesseditems/services/recentlyaccesseditems.ts
@@ -103,6 +103,8 @@ export const AddonBlockRecentlyAccessedItems = makeSingleton(AddonBlockRecentlyA
 
 /**
  * Result of WS block_recentlyaccesseditems_get_recent_items.
+ *
+ * The most recently accessed activities/resources by the logged user.
  */
 export type AddonBlockRecentlyAccessedItemsItem = {
     id: number; // Id.
@@ -116,6 +118,7 @@ export type AddonBlockRecentlyAccessedItemsItem = {
     viewurl: string; // Viewurl.
     courseviewurl: string; // Courseviewurl.
     icon: string; // Icon.
+    purpose?: string; // Purpose. @since 4.0
 } & AddonBlockRecentlyAccessedItemsItemCalculatedData;
 
 /**
diff --git a/src/addons/block/timeline/components/events/addon-block-timeline-events.html b/src/addons/block/timeline/components/events/addon-block-timeline-events.html
index 4ce38eaa3..3aab6a77b 100644
--- a/src/addons/block/timeline/components/events/addon-block-timeline-events.html
+++ b/src/addons/block/timeline/components/events/addon-block-timeline-events.html
@@ -23,7 +23,7 @@
                             <ion-col class="addon-block-timeline-activity-time ion-no-padding">
                                 <small>{{event.timesort * 1000 | coreFormatDate:"strftimetime24" }}</small>
                                 <core-mod-icon *ngIf="event.iconUrl" [modicon]="event.iconUrl" [componentId]="event.instance"
-                                    [modname]="event.modulename">
+                                    [modname]="event.modulename" [purpose]="event.purpose">
                                 </core-mod-icon>
                             </ion-col>
                             <ion-col class="addon-block-timeline-activity-name ion-no-padding">
diff --git a/src/addons/calendar/components/calendar/addon-calendar-calendar.html b/src/addons/calendar/components/calendar/addon-calendar-calendar.html
index 21d0bc83d..b355dd1e5 100644
--- a/src/addons/calendar/components/calendar/addon-calendar-calendar.html
+++ b/src/addons/calendar/components/calendar/addon-calendar-calendar.html
@@ -93,7 +93,7 @@
                                         </div>
                                     </ng-container>
                                     <p *ngIf="day.filteredEvents.length > 4" class="addon-calendar-day-more">
-                                        <b>{{ 'core.nummore' | translate:{$a: day.filteredEvents.length - 3} }}</b>
+                                        <strong>{{ 'core.nummore' | translate:{$a: day.filteredEvents.length - 3} }}</strong>
                                     </p>
                                 </div>
                             </ion-col>
diff --git a/src/addons/calendar/components/upcoming-events/addon-calendar-upcoming-events.html b/src/addons/calendar/components/upcoming-events/addon-calendar-upcoming-events.html
index ef63f7816..701ee61b4 100644
--- a/src/addons/calendar/components/upcoming-events/addon-calendar-upcoming-events.html
+++ b/src/addons/calendar/components/upcoming-events/addon-calendar-upcoming-events.html
@@ -8,7 +8,7 @@
                 <ion-item class="ion-text-wrap addon-calendar-event" [attr.aria-label]="event.name" (click)="eventClicked(event)" button
                     [ngClass]="['addon-calendar-eventtype-'+event.eventtype]" [detail]="false">
                     <core-mod-icon *ngIf="event.moduleIcon" [modicon]="event.moduleIcon" slot="start" [modname]="event.modulename"
-                        [componentId]="event.instance" [showAlt]="false"></core-mod-icon>
+                        [componentId]="event.instance" [showAlt]="false" [purpose]="event.purpose"></core-mod-icon>
                     <ion-icon *ngIf="event.eventIcon && !event.moduleIcon" [name]="event.eventIcon" slot="start" aria-hidden="true">
                     </ion-icon>
                     <ion-label>
diff --git a/src/addons/calendar/pages/day/day.html b/src/addons/calendar/pages/day/day.html
index e126fbfc2..1abcf2c16 100644
--- a/src/addons/calendar/pages/day/day.html
+++ b/src/addons/calendar/pages/day/day.html
@@ -70,7 +70,7 @@
                                         (click)="gotoEvent(event.id, day)" [class.item-dimmed]="event.ispast"
                                         [ngClass]="['addon-calendar-eventtype-'+event.eventtype]" button [detail]="false">
                                         <core-mod-icon *ngIf="event.moduleIcon" [modicon]="event.moduleIcon" slot="start" [showAlt]="false"
-                                            [modname]="event.modulename" [componentId]="event.instance">
+                                            [modname]="event.modulename" [componentId]="event.instance" [purpose]="event.purpose">
                                         </core-mod-icon>
                                         <ion-icon *ngIf="event.eventIcon && !event.moduleIcon" [name]="event.eventIcon" slot="start"
                                             aria-hidden="true">
diff --git a/src/addons/calendar/pages/event/event.html b/src/addons/calendar/pages/event/event.html
index 5180e04a9..1a7587712 100644
--- a/src/addons/calendar/pages/event/event.html
+++ b/src/addons/calendar/pages/event/event.html
@@ -42,7 +42,7 @@
         <ion-list *ngIf="event">
             <ion-item class="ion-text-wrap addon-calendar-event" collapsible [ngClass]="['addon-calendar-eventtype-'+event.eventtype]">
                 <core-mod-icon *ngIf="event.moduleIcon" [modicon]="event.moduleIcon" [showAlt]="false" [modname]="event.modulename"
-                    [componentId]="event.instance" slot="start"></core-mod-icon>
+                    [componentId]="event.instance" slot="start" [purpose]="event.purpose"></core-mod-icon>
                 <ion-icon *ngIf=" event.eventIcon && !event.moduleIcon" [name]="event.eventIcon" aria-hidden="true" slot="start">
                 </ion-icon>
                 <ion-label>
diff --git a/src/addons/calendar/services/calendar-helper.ts b/src/addons/calendar/services/calendar-helper.ts
index 8e263037d..09b58b831 100644
--- a/src/addons/calendar/services/calendar-helper.ts
+++ b/src/addons/calendar/services/calendar-helper.ts
@@ -178,6 +178,7 @@ export class AddonCalendarHelperProvider {
             format: 1,
             visible: 1,
             offline: false,
+            purpose: 'purpose' in event ? event.purpose : undefined,
         };
 
         if (event.modulename) {
@@ -660,7 +661,7 @@ export class AddonCalendarHelperProvider {
             const finalPromises: Promise<unknown>[] =[AddonCalendar.invalidateAllUpcomingEvents()];
 
             // Fetch months and days.
-            fetchTimestarts.map((fetchTime) => {
+            fetchTimestarts.forEach((fetchTime) => {
                 const day = moment(fetchTime * 1000);
 
                 const monthId = this.getMonthId(day);
@@ -696,7 +697,7 @@ export class AddonCalendarHelperProvider {
             });
 
             // Invalidate months and days.
-            invalidateTimestarts.map((fetchTime) => {
+            invalidateTimestarts.forEach((fetchTime) => {
                 const day = moment(fetchTime * 1000);
 
                 const monthId = this.getMonthId(day);
diff --git a/src/addons/calendar/services/calendar.ts b/src/addons/calendar/services/calendar.ts
index dc5c47d18..5e0f7e811 100644
--- a/src/addons/calendar/services/calendar.ts
+++ b/src/addons/calendar/services/calendar.ts
@@ -529,7 +529,7 @@ export class AddonCalendarProvider {
         // Convert the array to an object.
         const result = {};
         if (response.allowedeventtypes) {
-            response.allowedeventtypes.map((type) => {
+            response.allowedeventtypes.forEach((type) => {
                 result[type] = true;
             });
         }
@@ -1949,6 +1949,7 @@ export type AddonCalendarEventBase = {
  */
 export type AddonCalendarEvent = AddonCalendarEventBase & {
     url: string; // Url.
+    purpose?: string; // Purpose. @since 4.0
     action?: {
         name: string; // Name.
         url: string; // Url.
@@ -2302,6 +2303,7 @@ export type AddonCalendarEventToDisplay = Partial<AddonCalendarCalendarEvent> &
     ispast?: boolean; // Calculated in the app. Whether the event is in the past.
     contextLevel?: ContextLevel;
     contextInstanceId?: number;
+    purpose?: string; // Purpose. @since 4.0
 };
 
 /**
diff --git a/src/addons/messages/pages/discussion/discussion.html b/src/addons/messages/pages/discussion/discussion.html
index f5c3e8dba..d0c876da3 100644
--- a/src/addons/messages/pages/discussion/discussion.html
+++ b/src/addons/messages/pages/discussion/discussion.html
@@ -65,7 +65,7 @@
 
         <ng-container *ngIf="isSelf && !canLoadMore">
             <p class="ion-text-center">{{ 'addon.messages.selfconversation' | translate }}</p>
-            <p class="ion-text-center"><i>{{ 'addon.messages.selfconversationdefaultmessage' | translate }}</i></p>
+            <p class="ion-text-center"><em>{{ 'addon.messages.selfconversationdefaultmessage' | translate }}</em></p>
         </ng-container>
 
         <h2 class="sr-only">{{ title }}</h2>
diff --git a/src/addons/mod/assign/classes/submissions-source.ts b/src/addons/mod/assign/classes/submissions-source.ts
index 8a5ef3441..273867191 100644
--- a/src/addons/mod/assign/classes/submissions-source.ts
+++ b/src/addons/mod/assign/classes/submissions-source.ts
@@ -126,7 +126,7 @@ export class AddonModAssignSubmissionsSource extends CoreRoutedItemsManagerSourc
                         CoreSites.getCurrentSiteId(),
                     );
                 }
-            } catch (error) {
+            } catch {
                 // Ignore errors, probably user is offline or sync is blocked.
             }
         }
diff --git a/src/addons/mod/assign/components/submission/submission.ts b/src/addons/mod/assign/components/submission/submission.ts
index 7e040d205..d38e423ac 100644
--- a/src/addons/mod/assign/components/submission/submission.ts
+++ b/src/addons/mod/assign/components/submission/submission.ts
@@ -525,7 +525,7 @@ export class AddonModAssignSubmissionComponent implements OnInit, OnDestroy, Can
                             submitId: this.submitId,
                         }, this.siteId);
                     }
-                } catch (error) {
+                } catch {
                     // Ignore errors, probably user is offline or sync is blocked.
                 }
             }
diff --git a/src/addons/mod/assign/services/assign.ts b/src/addons/mod/assign/services/assign.ts
index 2b313ceaa..c09110175 100644
--- a/src/addons/mod/assign/services/assign.ts
+++ b/src/addons/mod/assign/services/assign.ts
@@ -565,7 +565,7 @@ export class AddonModAssignProvider {
         };
 
         try {
-            return this.getSubmissionStatus(assign.id, newOptions);
+            return await this.getSubmissionStatus(assign.id, newOptions);
         } catch {
             // Error, return the first result even if it doesn't have the user submission.
             return response;
diff --git a/src/addons/mod/chat/pages/chat/chat.ts b/src/addons/mod/chat/pages/chat/chat.ts
index 0fce55789..76a53a6a4 100644
--- a/src/addons/mod/chat/pages/chat/chat.ts
+++ b/src/addons/mod/chat/pages/chat/chat.ts
@@ -220,7 +220,7 @@ export class AddonModChatChatPage implements OnInit, OnDestroy, CanLeave {
             }
 
             return id;
-        } catch (error) {
+        } catch {
             // Ignore errors.
             return id;
         }
diff --git a/src/addons/mod/chat/services/chat-helper.ts b/src/addons/mod/chat/services/chat-helper.ts
index 2f4f6e02d..5ec95bdaa 100644
--- a/src/addons/mod/chat/services/chat-helper.ts
+++ b/src/addons/mod/chat/services/chat-helper.ts
@@ -66,7 +66,9 @@ export class AddonModChatHelperProvider {
         if (!formattedMessage.special && formattedMessage.message.match(patternTo)) {
             const matches = formattedMessage.message.match(patternTo);
 
-            formattedMessage.message = `<i><b>${Translate.instant('addon.mod_chat.saidto')} </b>${matches![1]}</i>: ${matches![2]}`;
+            formattedMessage.message = `<em>
+                <strong>${Translate.instant('addon.mod_chat.saidto')} </strong>
+                ${matches![1]}</em>: ${matches![2]}`;
         }
 
         formattedMessage.showUserData = this.showUserData(currentUserId, message, prevMessage);
diff --git a/src/addons/mod/data/services/data-helper.ts b/src/addons/mod/data/services/data-helper.ts
index 6993f0210..258b15bf2 100644
--- a/src/addons/mod/data/services/data-helper.ts
+++ b/src/addons/mod/data/services/data-helper.ts
@@ -723,7 +723,7 @@ export class AddonModDataHelperProvider {
             try {
                 await AddonModData.invalidateEntryData(dataId, entryId, siteId);
                 await AddonModData.invalidateEntriesData(dataId, siteId);
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
 
diff --git a/src/addons/mod/data/services/data.ts b/src/addons/mod/data/services/data.ts
index dde8919c8..09275a88a 100644
--- a/src/addons/mod/data/services/data.ts
+++ b/src/addons/mod/data/services/data.ts
@@ -987,7 +987,7 @@ export class AddonModDataProvider {
 
         options.groupId = options.groupId || 0;
         options.sort = options.sort || 0;
-        options.order || options.order || 'DESC';
+        options.order = options.order || 'DESC';
         options.page = options.page || 0;
         options.perPage = options.perPage || AddonModDataProvider.PER_PAGE;
         options.readingStrategy = options.readingStrategy || CoreSitesReadingStrategy.PREFER_NETWORK;
diff --git a/src/addons/mod/feedback/pages/attempt/attempt.ts b/src/addons/mod/feedback/pages/attempt/attempt.ts
index e8981da89..c83b91289 100644
--- a/src/addons/mod/feedback/pages/attempt/attempt.ts
+++ b/src/addons/mod/feedback/pages/attempt/attempt.ts
@@ -66,9 +66,9 @@ export class AddonModFeedbackAttemptPage implements OnInit, OnDestroy {
     /**
      * @inheritdoc
      */
-    ngOnInit(): void {
+    async ngOnInit(): Promise<void> {
         try {
-            this.attempts.start();
+            await this.attempts.start();
         } catch (error) {
             CoreDomUtils.showErrorModal(error);
 
diff --git a/src/addons/mod/forum/classes/forum-discussions-source.ts b/src/addons/mod/forum/classes/forum-discussions-source.ts
index f525f4d02..49b12fa60 100644
--- a/src/addons/mod/forum/classes/forum-discussions-source.ts
+++ b/src/addons/mod/forum/classes/forum-discussions-source.ts
@@ -292,7 +292,7 @@ export class AddonModForumDiscussionsSource extends CoreRoutedItemsManagerSource
 
                 discussion.userfullname = user.fullname;
                 discussion.userpictureurl = user.profileimageurl;
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
         });
diff --git a/src/addons/mod/forum/pages/discussion/discussion.page.ts b/src/addons/mod/forum/pages/discussion/discussion.page.ts
index 6556402dd..dafc9525d 100644
--- a/src/addons/mod/forum/pages/discussion/discussion.page.ts
+++ b/src/addons/mod/forum/pages/discussion/discussion.page.ts
@@ -358,7 +358,7 @@ export class AddonModForumDiscussionPage implements OnInit, AfterViewInit, OnDes
                         // Not set, use default sort.
                         // @TODO add fallback to $CFG->forum_displaymode.
                 }
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
         }
@@ -511,7 +511,7 @@ export class AddonModForumDiscussionPage implements OnInit, AfterViewInit, OnDes
                 }
 
                 await Promise.all(promises);
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
 
diff --git a/src/addons/mod/glossary/components/index/index.ts b/src/addons/mod/glossary/components/index/index.ts
index 36595994c..523c6ffa2 100644
--- a/src/addons/mod/glossary/components/index/index.ts
+++ b/src/addons/mod/glossary/components/index/index.ts
@@ -474,7 +474,7 @@ class AddonModGlossaryEntriesManager extends CoreListItemsManager<AddonModGlossa
             await AddonModGlossary.logView(glossary.id, viewMode, glossary.name);
 
             CoreCourse.checkModuleCompletion(this.page.courseId, this.page.module.completiondata);
-        } catch (error) {
+        } catch {
             // Ignore errors.
         }
     }
diff --git a/src/addons/mod/glossary/services/glossary.ts b/src/addons/mod/glossary/services/glossary.ts
index f85c300de..53ef5b21f 100644
--- a/src/addons/mod/glossary/services/glossary.ts
+++ b/src/addons/mod/glossary/services/glossary.ts
@@ -663,13 +663,12 @@ export class AddonModGlossaryProvider {
 
         // No more pages and the entry wasn't found. Reject.
         throw new CoreError('Entry not found.');
-    };
+    }
 
     /**
      * Performs the whole fetch of the entries using the proper function and arguments.
      *
      * @param fetchFunction Function to fetch.
-     * @param fetchArguments Arguments to call the fetching.
      * @param options Other options.
      * @return Promise resolved with all entrries.
      */
@@ -682,7 +681,7 @@ export class AddonModGlossaryProvider {
         const entries: AddonModGlossaryEntry[] = [];
 
         const fetchMoreEntries = async (): Promise<AddonModGlossaryEntry[]> => {
-            const result = await fetchFunction({
+            const result = fetchFunction({
                 from: entries.length,
                 ...options, // Include all options.
             });
@@ -915,7 +914,14 @@ export class AddonModGlossaryProvider {
 
         try {
             // Try to add it in online.
-            return this.addEntryOnline(glossaryId, concept, definition, entryOptions, <number> attachments, otherOptions.siteId);
+            return await this.addEntryOnline(
+                glossaryId,
+                concept,
+                definition,
+                entryOptions,
+                <number> attachments,
+                otherOptions.siteId,
+            );
         } catch (error) {
             if (otherOptions.allowOffline && !CoreUtils.isWebServiceError(error)) {
                 // Couldn't connect to server, store in offline.
diff --git a/src/addons/mod/h5pactivity/components/index/index.ts b/src/addons/mod/h5pactivity/components/index/index.ts
index b1808e316..74e0277b2 100644
--- a/src/addons/mod/h5pactivity/components/index/index.ts
+++ b/src/addons/mod/h5pactivity/components/index/index.ts
@@ -459,7 +459,7 @@ export class AddonModH5PActivityIndexComponent extends CoreCourseModuleMainActiv
                 try {
                     // Invalidate attempts.
                     await AddonModH5PActivity.invalidateUserAttempts(this.h5pActivity.id, undefined, this.siteId);
-                } catch (error) {
+                } catch {
                     // Ignore errors.
                 }
 
diff --git a/src/addons/mod/h5pactivity/pages/attempt-results/attempt-results.ts b/src/addons/mod/h5pactivity/pages/attempt-results/attempt-results.ts
index 3b3727a2b..552568111 100644
--- a/src/addons/mod/h5pactivity/pages/attempt-results/attempt-results.ts
+++ b/src/addons/mod/h5pactivity/pages/attempt-results/attempt-results.ts
@@ -119,7 +119,7 @@ export class AddonModH5PActivityAttemptResultsPage implements OnInit {
 
         try {
             this.user = await CoreUser.getProfile(this.attempt.userid, this.courseId, true);
-        } catch (error) {
+        } catch {
             // Ignore errors.
         }
     }
diff --git a/src/addons/mod/h5pactivity/pages/user-attempts/user-attempts.ts b/src/addons/mod/h5pactivity/pages/user-attempts/user-attempts.ts
index bb95f9fcb..c0864d3ec 100644
--- a/src/addons/mod/h5pactivity/pages/user-attempts/user-attempts.ts
+++ b/src/addons/mod/h5pactivity/pages/user-attempts/user-attempts.ts
@@ -133,7 +133,7 @@ export class AddonModH5PActivityUserAttemptsPage implements OnInit {
     protected async fetchUserProfile(): Promise<void> {
         try {
             this.user = await CoreUser.getProfile(this.userId, this.courseId, true);
-        } catch (error) {
+        } catch {
             // Ignore errors.
         }
     }
diff --git a/src/addons/mod/lesson/services/handlers/prefetch.ts b/src/addons/mod/lesson/services/handlers/prefetch.ts
index 4d87bf1ce..011b47b40 100644
--- a/src/addons/mod/lesson/services/handlers/prefetch.ts
+++ b/src/addons/mod/lesson/services/handlers/prefetch.ts
@@ -143,7 +143,7 @@ export class AddonModLessonPrefetchHandlerService extends CoreCourseActivityPref
 
         if (password) {
             try {
-                return this.validatePassword(lessonId, accessInfo, password, options);
+                return await this.validatePassword(lessonId, accessInfo, password, options);
             } catch {
                 // Error validating it.
             }
@@ -320,7 +320,7 @@ export class AddonModLessonPrefetchHandlerService extends CoreCourseActivityPref
      * @param lesson Lesson.
      * @param password Password (if needed).
      * @param retake Retake to prefetch.
-     * @param options Options.
+     * @param modOptions Options.
      * @return Promise resolved when done.
      */
     protected async prefetchPlayData(
@@ -364,12 +364,7 @@ export class AddonModLessonPrefetchHandlerService extends CoreCourseActivityPref
         const promises = pages.map(async (data) => {
             // Check if any page has a RANDOMBRANCH jump.
             if (!hasRandomBranch) {
-                for (let i = 0; i < data.jumps.length; i++) {
-                    if (data.jumps[i] == AddonModLessonProvider.LESSON_RANDOMBRANCH) {
-                        hasRandomBranch = true;
-                        break;
-                    }
-                }
+                hasRandomBranch = data.jumps.some((jump) => jump === AddonModLessonProvider.LESSON_RANDOMBRANCH);
             }
 
             // Get the page data. We don't pass accessInfo because we don't need to calculate the offline data.
@@ -499,8 +494,8 @@ export class AddonModLessonPrefetchHandlerService extends CoreCourseActivityPref
      * Validate the password.
      *
      * @param lessonId Lesson ID.
-     * @param info Lesson access info.
-     * @param pwd Password to check.
+     * @param accessInfo Lesson access info.
+     * @param password Password to check.
      * @param options Other options.
      * @return Promise resolved when done.
      */
diff --git a/src/addons/mod/lti/services/lti-helper.ts b/src/addons/mod/lti/services/lti-helper.ts
index dcb3ac154..b23cda06a 100644
--- a/src/addons/mod/lti/services/lti-helper.ts
+++ b/src/addons/mod/lti/services/lti-helper.ts
@@ -118,7 +118,7 @@ export class AddonModLtiHelperProvider {
             await AddonModLti.logView(ltiId, name, siteId);
 
             CoreCourse.checkModuleCompletion(courseId, module.completiondata);
-        } catch (error) {
+        } catch {
             // Ignore errors.
         }
     }
diff --git a/src/addons/mod/wiki/components/index/addon-mod-wiki-index.html b/src/addons/mod/wiki/components/index/addon-mod-wiki-index.html
index 56336ba50..c6e278efb 100644
--- a/src/addons/mod/wiki/components/index/addon-mod-wiki-index.html
+++ b/src/addons/mod/wiki/components/index/addon-mod-wiki-index.html
@@ -65,7 +65,7 @@
         </article>
 
         <div class="ion-margin-top" *ngIf="tagsEnabled && tags.length > 0">
-            <b>{{ 'core.tag.tags' | translate }}:</b>
+            <strong>{{ 'core.tag.tags' | translate }}:</strong>
             <core-tag-list [tags]="tags"></core-tag-list>
         </div>
     </div>
diff --git a/src/addons/mod/wiki/services/wiki.ts b/src/addons/mod/wiki/services/wiki.ts
index d83357c88..32180ffb9 100644
--- a/src/addons/mod/wiki/services/wiki.ts
+++ b/src/addons/mod/wiki/services/wiki.ts
@@ -723,7 +723,7 @@ export class AddonModWikiProvider {
 
         try {
             // Try to create it in online.
-            return this.newPageOnline(title, content, options);
+            return await this.newPageOnline(title, content, options);
         } catch (error) {
             if (CoreUtils.isWebServiceError(error)) {
                 // The WebService has thrown an error, this means that the page cannot be added.
diff --git a/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts b/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
index 26d9b61c1..78b028706 100644
--- a/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
+++ b/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
@@ -119,7 +119,7 @@ export class AddonModWorkshopAssessmentStrategyComponent implements OnInit, OnDe
 
             // Load Weights selector.
             if (this.edit && this.access.canallocate) {
-                this.weights;
+                this.weights = [];
                 for (let i = 16; i >= 0; i--) {
                     this.weights[i] = i;
                 }
@@ -347,8 +347,6 @@ export class AddonModWorkshopAssessmentStrategyComponent implements OnInit, OnDe
                     this.workshop.course,
                     assessmentData,
                 );
-
-                gradeUpdated = false;
             } else {
 
                 // Try to send it to server.
diff --git a/src/core/components/icon/icon.scss b/src/core/components/icon/icon.scss
index 097de22a6..cc3176c14 100644
--- a/src/core/components/icon/icon.scss
+++ b/src/core/components/icon/icon.scss
@@ -8,7 +8,6 @@
 
 :host-context(ion-item.md) ion-icon {
     &[slot] {
-        font-size: 1.6em;
         color: rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.54);
         font-size: 24px;
         margin-top: 12px;
diff --git a/src/core/components/mod-icon/mod-icon.ts b/src/core/components/mod-icon/mod-icon.ts
index f0362138b..f2e59c7d7 100644
--- a/src/core/components/mod-icon/mod-icon.ts
+++ b/src/core/components/mod-icon/mod-icon.ts
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { CoreConstants } from '@/core/constants';
+import { CoreConstants, ModPurpose } from '@/core/constants';
 import { Component, ElementRef, Input, OnChanges, OnInit, SimpleChange } from '@angular/core';
 import { CoreCourse } from '@features/course/services/course';
 import { CoreCourseModuleDelegate } from '@features/course/services/module-delegate';
@@ -31,10 +31,11 @@ const fallbackModName = 'external-tool';
 })
 export class CoreModIconComponent implements OnInit, OnChanges {
 
-    @Input() modname?; // The module name. Used also as component if set.
-    @Input() componentId?; // Component Id for external icons.
+    @Input() modname?: string; // The module name. Used also as component if set.
+    @Input() componentId?: number; // Component Id for external icons.
     @Input() modicon?: string; // Module icon url or local url.
     @Input() showAlt = true; // Show alt otherwise it's only presentation icon.
+    @Input() purpose: ModPurpose = ModPurpose.MOD_PURPOSE_OTHER; // Purpose of the module.
 
     icon = '';
     modNameTranslated = '';
@@ -62,10 +63,15 @@ export class CoreModIconComponent implements OnInit, OnChanges {
         this.modNameTranslated = this.modname ? CoreCourse.translateModuleName(this.modname) || '' : '';
         if (CoreSites.getCurrentSite()?.isVersionGreaterEqualThan('4.0')) {
             this.legacyIcon = false;
-            const purposeClass =
-                CoreCourseModuleDelegate.supportsFeature<string>(this.modname, CoreConstants.FEATURE_MOD_PURPOSE, '');
 
-            if (purposeClass != '') {
+            const purposeClass =
+                CoreCourseModuleDelegate.supportsFeature<ModPurpose>(
+                    this.modname || '',
+                    CoreConstants.FEATURE_MOD_PURPOSE,
+                    this.purpose,
+                );
+
+            if (purposeClass) {
                 const element: HTMLElement = this.el.nativeElement;
                 element.classList.add(purposeClass);
             }
@@ -94,8 +100,8 @@ export class CoreModIconComponent implements OnInit, OnChanges {
         // If modname is not set icon won't be cached.
         // Also if the url matches the regexp (the theme will manage the image so it's not cached).
         this.linkIconWithComponent =
-            this.modname &&
-            this.componentId &&
+            !!this.modname &&
+            !!this.componentId &&
             !this.isLocalUrl &&
             !this.icon.match('/theme/image.php/[^/]+/' + this.modname + '/[-0-9]*/');
     }
diff --git a/src/core/features/block/classes/base-block-component.ts b/src/core/features/block/classes/base-block-component.ts
index b73e0e517..58d3878ab 100644
--- a/src/core/features/block/classes/base-block-component.ts
+++ b/src/core/features/block/classes/base-block-component.ts
@@ -52,10 +52,8 @@ export abstract class CoreBlockBaseComponent implements OnInit, ICoreBlockCompon
      */
     async ngOnInit(): Promise<void> {
         if (this.block.configs && this.block.configs.length > 0) {
-            this.block.configs.map((config) => {
+            this.block.configs.forEach((config) => {
                 config.value = CoreTextUtils.parseJSON(config.value);
-
-                return config;
             });
 
             this.block.configsRecord = CoreUtils.arrayToObject(this.block.configs, 'name');
diff --git a/src/core/features/courses/services/handlers/course-link.ts b/src/core/features/courses/services/handlers/course-link.ts
index 5c7347844..0bd9d0229 100644
--- a/src/core/features/courses/services/handlers/course-link.ts
+++ b/src/core/features/courses/services/handlers/course-link.ts
@@ -47,13 +47,7 @@ export class CoreCoursesCourseLinkHandlerService extends CoreContentLinksHandler
     }
 
     /**
-     * Get the list of actions for a link (url).
-     *
-     * @param siteIds List of sites the URL belongs to.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @return List of (or promise resolved with list of) actions.
+     * @inheritdoc
      */
     getActions(
         siteIds: string[],
@@ -103,17 +97,10 @@ export class CoreCoursesCourseLinkHandlerService extends CoreContentLinksHandler
     }
 
     /**
-     * Check if the handler is enabled for a certain site (site + user) and a URL.
-     * If not defined, defaults to true.
-     *
-     * @param siteId The site ID.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @return Whether the handler is enabled for the URL and site.
+     * @inheritdoc
      */
-    async isEnabled(siteId: string, url: string, params: Params, courseId?: number): Promise<boolean> {
-        courseId = parseInt(params.id, 10);
+    async isEnabled(siteId: string, url: string, params: Params): Promise<boolean> {
+        const courseId = parseInt(params.id, 10);
 
         if (!courseId) {
             return false;
@@ -333,7 +320,7 @@ export class CoreCoursesCourseLinkHandlerService extends CoreContentLinksHandler
 
             await CoreUtils.wait(5000);
 
-            return await this.waitForEnrolled(courseId);
+            return this.waitForEnrolled(courseId);
         }
     }
 
diff --git a/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts b/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
index 44a06bb56..ac0ceebf9 100644
--- a/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
+++ b/src/core/features/editor/components/rich-text-editor/rich-text-editor.ts
@@ -973,7 +973,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
                     this.showMessage('core.editor.textrecovered', this.RESTORE_MESSAGE_CLEAR_TIME);
                 }
             }
-        } catch (error) {
+        } catch {
             // Ignore errors, shouldn't happen.
         }
     }
diff --git a/src/core/features/editor/services/editor-offline.ts b/src/core/features/editor/services/editor-offline.ts
index 810893090..0025f84e4 100644
--- a/src/core/features/editor/services/editor-offline.ts
+++ b/src/core/features/editor/services/editor-offline.ts
@@ -56,7 +56,7 @@ export class CoreEditorOfflineProvider {
             const params = this.fixDraftPrimaryData(contextLevel, contextInstanceId, elementId, extraParams);
 
             await db.deleteRecords(DRAFT_TABLE, params);
-        } catch (error) {
+        } catch {
             // Ignore errors, probably no draft stored.
         }
     }
@@ -149,12 +149,12 @@ export class CoreEditorOfflineProvider {
                 }
 
                 await db.insertRecord(DRAFT_TABLE, entry);
-            } catch (error) {
+            } catch {
                 // Ignore errors saving the draft. It shouldn't happen.
             }
 
             return entry;
-        } catch (error) {
+        } catch {
             // No draft stored. Store an empty draft to save the pageinstance.
             await this.saveDraft(
                 contextLevel,
diff --git a/src/core/features/fileuploader/services/fileuploader-helper.ts b/src/core/features/fileuploader/services/fileuploader-helper.ts
index 6f160a070..ab401b17c 100644
--- a/src/core/features/fileuploader/services/fileuploader-helper.ts
+++ b/src/core/features/fileuploader/services/fileuploader-helper.ts
@@ -812,7 +812,7 @@ export class CoreFileUploaderHelperProvider {
                 file = await CoreFile.getFileObjectFromFileEntry(fileEntry);
 
                 size = file.size;
-            } catch (error) {
+            } catch {
                 // Ignore failures.
             }
         }
diff --git a/src/core/features/grades/services/handlers/report-link.ts b/src/core/features/grades/services/handlers/report-link.ts
index 1efed0df7..a6457e3a9 100644
--- a/src/core/features/grades/services/handlers/report-link.ts
+++ b/src/core/features/grades/services/handlers/report-link.ts
@@ -30,14 +30,7 @@ export class CoreGradesReportLinkHandlerService extends CoreContentLinksHandlerB
     pattern = /\/grade\/report(\/user)?\/index.php/;
 
     /**
-     * Get the list of actions for a link (url).
-     *
-     * @param siteIds List of sites the URL belongs to.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @param data Extra data to handle the URL.
-     * @return List of (or promise resolved with list of) actions.
+     * @inheritdoc
      */
     getActions(
         siteIds: string[],
@@ -60,14 +53,7 @@ export class CoreGradesReportLinkHandlerService extends CoreContentLinksHandlerB
     }
 
     /**
-     * Check if the handler is enabled for a certain site (site + user) and a URL.
-     * If not defined, defaults to true.
-     *
-     * @param siteId The site ID.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @return Whether the handler is enabled for the URL and site.
+     * @inheritdoc
      */
     async isEnabled(siteId: string, url: string, params: Record<string, string>, courseId?: number): Promise<boolean> {
         if (!courseId && !params.id) {
diff --git a/src/core/features/grades/services/handlers/user-link.ts b/src/core/features/grades/services/handlers/user-link.ts
index 1f1ba4008..b3fd56690 100644
--- a/src/core/features/grades/services/handlers/user-link.ts
+++ b/src/core/features/grades/services/handlers/user-link.ts
@@ -30,14 +30,7 @@ export class CoreGradesUserLinkHandlerService extends CoreContentLinksHandlerBas
     pattern = /\/course\/user\.php.*[?&]mode=grade/;
 
     /**
-     * Get the list of actions for a link (url).
-     *
-     * @param siteIds List of sites the URL belongs to.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @param data Extra data to handle the URL.
-     * @return List of (or promise resolved with list of) actions.
+     * @inheritdoc
      */
     getActions(
         siteIds: string[],
@@ -60,14 +53,7 @@ export class CoreGradesUserLinkHandlerService extends CoreContentLinksHandlerBas
     }
 
     /**
-     * Check if the handler is enabled for a certain site (site + user) and a URL.
-     * If not defined, defaults to true.
-     *
-     * @param siteId The site ID.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @return Whether the handler is enabled for the URL and site.
+     * @inheritdoc
      */
     async isEnabled(siteId: string, url: string, params: Record<string, string>, courseId?: number): Promise<boolean> {
         if (!courseId && !params.id) {
diff --git a/src/core/features/h5p/classes/content-validator.ts b/src/core/features/h5p/classes/content-validator.ts
index 20c2cb69b..b2861a8f0 100644
--- a/src/core/features/h5p/classes/content-validator.ts
+++ b/src/core/features/h5p/classes/content-validator.ts
@@ -191,7 +191,7 @@ export class CoreH5PContentValidator {
     /**
      * Validate given value against number semantics.
      *
-     * @param num Number to validate.
+     * @param value Number to validate.
      * @param semantics Semantics.
      * @return Validated number.
      */
@@ -497,9 +497,7 @@ export class CoreH5PContentValidator {
                 let validateFunction: undefined | ((...args: unknown[]) => unknown);
                 let field: CoreH5PSemantics | undefined;
 
-                for (let i = 0; i < semantics.fields.length; i++) {
-                    field = semantics.fields[i];
-
+                for (const field of semantics.fields) {
                     if (field.name == key) {
                         if (semantics.optional) {
                             field.optional = true;
@@ -778,8 +776,7 @@ export class CoreH5PContentValidator {
                     if (matches && matches.length > 1) {
                         if (allowedStyles && attrName === 'style') {
                             // Allow certain styles.
-                            for (let i = 0; i < allowedStyles.length; i++) {
-                                const pattern = allowedStyles[i];
+                            for (const pattern of allowedStyles) {
                                 if (matches[1].match(pattern)) {
                                     // All patterns are start to end patterns, and CKEditor adds one span per style.
                                     attrArray.push('style="' + matches[1] + '"');
@@ -1122,7 +1119,7 @@ export class CoreH5PContentValidator {
             },
         ];
 
-        return this.metadataSemantics!;
+        return this.metadataSemantics;
     }
 
     /**
@@ -1266,7 +1263,7 @@ export class CoreH5PContentValidator {
             ],
         };
 
-        return this.copyrightSemantics!;
+        return this.copyrightSemantics;
     }
 
     /**
diff --git a/src/core/features/h5p/classes/core.ts b/src/core/features/h5p/classes/core.ts
index 8c50ea5eb..e77c7c752 100644
--- a/src/core/features/h5p/classes/core.ts
+++ b/src/core/features/h5p/classes/core.ts
@@ -292,7 +292,7 @@ export class CoreH5PCore {
                 // Update library usage.
                 try {
                     await this.h5pFramework.deleteLibraryUsage(content.id, siteId);
-                } catch (error) {
+                } catch {
                     // Ignore errors.
                 }
 
diff --git a/src/core/features/h5p/classes/file-storage.ts b/src/core/features/h5p/classes/file-storage.ts
index 5bbab236d..598e4a404 100644
--- a/src/core/features/h5p/classes/file-storage.ts
+++ b/src/core/features/h5p/classes/file-storage.ts
@@ -229,7 +229,7 @@ export class CoreH5PFileStorage {
             try {
                 // Delete the index.html.
                 await this.deleteContentIndex(entry.foldername, site.getId());
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
         });
@@ -463,7 +463,7 @@ export class CoreH5PFileStorage {
         // Delete existing library version.
         try {
             await CoreFile.removeDir(folderPath);
-        } catch (error) {
+        } catch {
             // Ignore errors, maybe it doesn't exist.
         }
 
diff --git a/src/core/features/h5p/classes/helper.ts b/src/core/features/h5p/classes/helper.ts
index d418fa615..126ee649f 100644
--- a/src/core/features/h5p/classes/helper.ts
+++ b/src/core/features/h5p/classes/helper.ts
@@ -223,7 +223,7 @@ export class CoreH5PHelper {
             // Remove tmp folder.
             try {
                 await CoreFile.removeDir(destFolder);
-            } catch (error) {
+            } catch {
                 // Ignore errors, it will be deleted eventually.
             }
         }
diff --git a/src/core/features/h5p/classes/validator.ts b/src/core/features/h5p/classes/validator.ts
index edc952aa2..7eca0f96f 100644
--- a/src/core/features/h5p/classes/validator.ts
+++ b/src/core/features/h5p/classes/validator.ts
@@ -273,7 +273,7 @@ export class CoreH5PValidator {
 
                     const parts = entry.name.split('.'); // The language code is in parts[0].
                     langIndex[parts[0]] = langFileData;
-                } catch (error) {
+                } catch {
                     // Ignore this language.
                 }
             }));
diff --git a/src/core/features/h5p/components/h5p-player/h5p-player.ts b/src/core/features/h5p/components/h5p-player/h5p-player.ts
index dfc86f0b4..2d727e8af 100644
--- a/src/core/features/h5p/components/h5p-player/h5p-player.ts
+++ b/src/core/features/h5p/components/h5p-player/h5p-player.ts
@@ -47,7 +47,7 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
     canDownload$ = new BehaviorSubject(false);
     calculating$ = new BehaviorSubject(true);
     displayOptions?: CoreH5PDisplayOptions;
-    urlParams?: {[name: string]: string};
+    urlParams: {[name: string]: string} = {};
 
     protected site: CoreSite;
     protected siteId: string;
@@ -60,7 +60,7 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
     ) {
 
         this.logger = CoreLogger.getInstance('CoreH5PPlayerComponent');
-        this.site = CoreSites.getCurrentSite()!;
+        this.site = CoreSites.getRequiredCurrentSite();
         this.siteId = this.site.getId();
         this.siteCanDownload = this.site.canDownloadFiles() && !CoreH5P.isOfflineDisabledInSite();
     }
@@ -100,7 +100,7 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
 
         // Download the package in background if the size is low.
         try {
-            this.attemptDownloadInBg();
+            await this.attemptDownloadInBg();
         } catch (error) {
             this.logger.error('Error downloading H5P in background', error);
         }
@@ -120,12 +120,12 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
 
         try {
             // Get the file size and ask the user to confirm.
-            const size = await CorePluginFileDelegate.getFileSize({ fileurl: this.urlParams!.url }, this.siteId);
+            const size = await CorePluginFileDelegate.getFileSize({ fileurl: this.urlParams.url }, this.siteId);
 
             await CoreDomUtils.confirmDownloadSize({ size: size, total: true });
 
             // User confirmed, add to the queue.
-            await CoreFilepool.addToQueueByUrl(this.siteId, this.urlParams!.url, this.component, this.componentId);
+            await CoreFilepool.addToQueueByUrl(this.siteId, this.urlParams.url, this.component, this.componentId);
 
         } catch (error) {
             if (CoreDomUtils.isCanceledError(error)) {
@@ -191,7 +191,6 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
     /**
      * Calculate state of the file.
      *
-     * @param fileUrl The H5P file URL.
      * @return Promise resolved when done.
      */
     protected async calculateState(): Promise<void> {
@@ -199,7 +198,7 @@ export class CoreH5PPlayerComponent implements OnInit, OnChanges, OnDestroy {
 
         // Get the status of the file.
         try {
-            const state = await CoreFilepool.getFileStateByUrl(this.siteId, this.urlParams!.url);
+            const state = await CoreFilepool.getFileStateByUrl(this.siteId, this.urlParams.url);
 
             this.canDownload$.next(true);
             this.state = state;
diff --git a/src/core/features/login/components/site-help/site-help.html b/src/core/features/login/components/site-help/site-help.html
index 10242b5cd..502818a75 100644
--- a/src/core/features/login/components/site-help/site-help.html
+++ b/src/core/features/login/components/site-help/site-help.html
@@ -14,7 +14,7 @@
     <ion-list>
         <ion-item class="ion-text-wrap">
             <ion-label>
-                <h2><b>{{ 'core.login.faqcannotfindmysitequestion' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqcannotfindmysitequestion' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap">
@@ -24,7 +24,7 @@
         </ion-item>
         <ion-item class="ion-text-wrap">
             <ion-label>
-                <h2><b>{{ 'core.login.faqwhatisurlquestion' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqwhatisurlquestion' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap core-login-faqwhatisurlanswer">
@@ -34,7 +34,7 @@
         </ion-item>
         <ion-item class="ion-text-wrap">
             <ion-label>
-                <h2><b>{{ 'core.login.faqcannotconnectquestion' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqcannotconnectquestion' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap">
@@ -44,7 +44,7 @@
         </ion-item>
         <ion-item class="ion-text-wrap">
             <ion-label>
-                <h2><b>{{ 'core.login.faqsetupsitequestion' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqsetupsitequestion' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap">
@@ -57,7 +57,7 @@
         </ion-item>
         <ion-item class="ion-text-wrap">
             <ion-label>
-                <h2><b>{{ 'core.login.faqtestappquestion' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqtestappquestion' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap">
@@ -67,7 +67,7 @@
         </ion-item>
         <ion-item class="ion-text-wrap" *ngIf="canScanQR">
             <ion-label>
-                <h2><b>{{ 'core.login.faqwhereisqrcode' | translate }}</b></h2>
+                <h2><strong>{{ 'core.login.faqwhereisqrcode' | translate }}</strong></h2>
             </ion-label>
         </ion-item>
         <ion-item class="ion-text-wrap core-login-faqwhereisqrcodeanswer" *ngIf="canScanQR">
diff --git a/src/core/features/login/pages/site/site.ts b/src/core/features/login/pages/site/site.ts
index 902fbd16c..bd7df5d05 100644
--- a/src/core/features/login/pages/site/site.ts
+++ b/src/core/features/login/pages/site/site.ts
@@ -360,7 +360,7 @@ export class CoreLoginSitePage implements OnInit {
                     params: pageParams,
                 });
             }
-        } catch (error) {
+        } catch {
             // Ignore errors.
         }
     }
@@ -546,7 +546,7 @@ export class CoreLoginSitePage implements OnInit {
                     },
                 });
             }
-        } catch (error) {
+        } catch {
             // Ignore errors.
         } finally {
             modal.dismiss();
diff --git a/src/core/features/pushnotifications/services/pushnotifications.ts b/src/core/features/pushnotifications/services/pushnotifications.ts
index 366ae942d..927db6168 100644
--- a/src/core/features/pushnotifications/services/pushnotifications.ts
+++ b/src/core/features/pushnotifications/services/pushnotifications.ts
@@ -625,14 +625,11 @@ export class CorePushNotificationsProvider {
 
         const total = counters.reduce((previous, counter) => previous + counter, 0);
 
-        if (!CorePlatform.isMobile()) {
-            // Browser doesn't have an app badge, stop.
-            return total;
+        if (CorePlatform.isMobile()) {
+            // Set the app badge on mobile.
+            await Badge.set(total);
         }
 
-        // Set the app badge.
-        await Badge.set(total);
-
         return total;
     }
 
diff --git a/src/core/features/rating/services/rating.ts b/src/core/features/rating/services/rating.ts
index fa401c826..6a6d6bc7b 100644
--- a/src/core/features/rating/services/rating.ts
+++ b/src/core/features/rating/services/rating.ts
@@ -404,17 +404,15 @@ export class CoreRatingProvider {
             true,
         ));
 
+        const ratingsResults = await Promise.all(promises);
+
         if (!site.isVersionGreaterEqualThan([' 3.6.5', '3.7.1', '3.8'])) {
-            promises.map((promise) => promise.then(async (ratings) => {
-                const userIds = ratings.map((rating: CoreRatingItemRating) => rating.userid);
+            const ratings: CoreRatingItemRating[] = [].concat.apply([], ratingsResults);
 
-                await CoreUser.prefetchProfiles(userIds, courseId, site.id);
+            const userIds = ratings.map((rating) => rating.userid);
 
-                return;
-            }));
+            await CoreUser.prefetchProfiles(userIds, courseId, site.id);
         }
-
-        await Promise.all(promises);
     }
 
     /**
diff --git a/src/core/features/sitehome/services/handlers/index-link.ts b/src/core/features/sitehome/services/handlers/index-link.ts
index ebe42ecb3..58e7cc299 100644
--- a/src/core/features/sitehome/services/handlers/index-link.ts
+++ b/src/core/features/sitehome/services/handlers/index-link.ts
@@ -53,8 +53,9 @@ export class CoreSiteHomeIndexLinkHandlerService extends CoreContentLinksHandler
     /**
      * @inheritdoc
      */
-    async isEnabled(siteId: string, url: string, params: Record<string, string>, courseId?: number): Promise<boolean> {
-        courseId = parseInt(params.id, 10);
+    async isEnabled(siteId: string, url: string, params: Record<string, string>): Promise<boolean> {
+        const courseId = parseInt(params.id, 10);
+
         if (!courseId) {
             return url.includes('index.php');
         }
diff --git a/src/core/features/user/pages/about/about.scss b/src/core/features/user/pages/about/about.scss
index 1ed9a0b9f..8edaa46ad 100644
--- a/src/core/features/user/pages/about/about.scss
+++ b/src/core/features/user/pages/about/about.scss
@@ -16,12 +16,12 @@
             .contact-status {
                 width: 24px !important;
                 height: 24px !important;
-                right: calc(50% - 12px -  var(--core-avatar-size) / 2) !important;
+                right: calc(50% - 12px - var(--core-avatar-size) / 2) !important;
             }
 
             .edit-avatar {
                 position: absolute;
-                right: calc(50% - 15px -  var(--core-avatar-size) / 2);
+                right: calc(50% - 15px - var(--core-avatar-size) / 2);
                 bottom: -12px;
 
                 :host-context([dir="rtl"]) & {
diff --git a/src/core/features/user/pages/profile/profile.scss b/src/core/features/user/pages/profile/profile.scss
index 41723e265..0265d7694 100644
--- a/src/core/features/user/pages/profile/profile.scss
+++ b/src/core/features/user/pages/profile/profile.scss
@@ -16,7 +16,7 @@
             .contact-status {
                 width: 24px !important;
                 height: 24px !important;
-                right: calc(50% - 12px -  var(--core-avatar-size) / 2) !important;
+                right: calc(50% - 12px - var(--core-avatar-size) / 2) !important;
             }
         }
     }
diff --git a/src/core/features/user/services/handlers/profile-link.ts b/src/core/features/user/services/handlers/profile-link.ts
index b7eb0ad5b..a4b6ce399 100644
--- a/src/core/features/user/services/handlers/profile-link.ts
+++ b/src/core/features/user/services/handlers/profile-link.ts
@@ -30,21 +30,12 @@ export class CoreUserProfileLinkHandlerService extends CoreContentLinksHandlerBa
     pattern = /((\/user\/view\.php)|(\/user\/profile\.php)).*([?&]id=\d+)/;
 
     /**
-     * Get the list of actions for a link (url).
-     *
-     * @param siteIds List of sites the URL belongs to.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @param data Extra data to handle the URL.
-     * @return List of (or promise resolved with list of) actions.
+     * @inheritdoc
      */
     getActions(
         siteIds: string[],
         url: string,
         params: Record<string, string>,
-        courseId?: number, // eslint-disable-line @typescript-eslint/no-unused-vars
-        data?: unknown, // eslint-disable-line @typescript-eslint/no-unused-vars
     ): CoreContentLinksAction[] | Promise<CoreContentLinksAction[]> {
         return [{
             action: (siteId): void => {
@@ -59,17 +50,9 @@ export class CoreUserProfileLinkHandlerService extends CoreContentLinksHandlerBa
     }
 
     /**
-     * Check if the handler is enabled for a certain site (site + user) and a URL.
-     * If not defined, defaults to true.
-     *
-     * @param siteId The site ID.
-     * @param url The URL to treat.
-     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
-     * @param courseId Course ID related to the URL. Optional but recommended.
-     * @return Whether the handler is enabled for the URL and site.
+     * @inheritdoc
      */
-    // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    async isEnabled(siteId: string, url: string, params: Record<string, string>, courseId?: number): Promise<boolean> {
+    async isEnabled(siteId: string, url: string): Promise<boolean> {
         return url.indexOf('/grade/report/') == -1;
     }
 
diff --git a/src/core/features/user/services/user-profile-field-delegate.ts b/src/core/features/user/services/user-profile-field-delegate.ts
index 0432a8ea0..6a5b2c284 100644
--- a/src/core/features/user/services/user-profile-field-delegate.ts
+++ b/src/core/features/user/services/user-profile-field-delegate.ts
@@ -181,7 +181,7 @@ export class CoreUserProfileFieldDelegateService extends CoreDelegate<CoreUserPr
                 if (data) {
                     result.push(data);
                 }
-            } catch (error) {
+            } catch {
                 // Ignore errors.
             }
         }));
diff --git a/src/core/pipes/format-date.ts b/src/core/pipes/format-date.ts
index 2e49d275a..84a0e91d8 100644
--- a/src/core/pipes/format-date.ts
+++ b/src/core/pipes/format-date.ts
@@ -43,7 +43,7 @@ export class CoreFormatDatePipe implements PipeTransform {
         timestamp = timestamp || Date.now();
         format = format || 'strftimedaydatetime';
 
-        if (typeof timestamp == 'string') {
+        if (typeof timestamp === 'string') {
             // Convert the value to a number.
             const numberTimestamp = parseInt(timestamp, 10);
             if (isNaN(numberTimestamp)) {
@@ -55,7 +55,7 @@ export class CoreFormatDatePipe implements PipeTransform {
         }
 
         // Add "core." if needed.
-        if (format.indexOf('strf') == 0 || format.indexOf('df') == 0) {
+        if (format.indexOf('strf') === 0 || format.indexOf('df') === 0) {
             format = 'core.' + format;
         }
 
diff --git a/src/core/services/file.ts b/src/core/services/file.ts
index 0d8c96388..85580f311 100644
--- a/src/core/services/file.ts
+++ b/src/core/services/file.ts
@@ -1205,7 +1205,7 @@ export class CoreFileProvider {
             });
 
             await Promise.all(promises);
-        } catch (error) {
+        } catch {
             // Ignore errors, maybe it doesn't exist.
         }
     }
diff --git a/src/core/services/filepool.ts b/src/core/services/filepool.ts
index d954aff62..fbe4a2e2b 100644
--- a/src/core/services/filepool.ts
+++ b/src/core/services/filepool.ts
@@ -1467,7 +1467,7 @@ export class CoreFilepoolProvider {
                 const fileSize = await CoreFile.getFileSize(file.path);
 
                 size += fileSize;
-            } catch (error) {
+            } catch {
                 // Ignore failures, maybe some file was deleted.
             }
         }));
diff --git a/src/core/services/plugin-file-delegate.ts b/src/core/services/plugin-file-delegate.ts
index cf5602af8..4839be2fb 100644
--- a/src/core/services/plugin-file-delegate.ts
+++ b/src/core/services/plugin-file-delegate.ts
@@ -200,10 +200,8 @@ export class CorePluginFileDelegateService extends CoreDelegate<CorePluginFileHa
 
         if (handler && handler.getFileSize) {
             try {
-                const size = handler.getFileSize(downloadableFile, siteId);
-
-                return size;
-            } catch (error) {
+                return await handler.getFileSize(downloadableFile, siteId);
+            } catch {
                 // Ignore errors.
             }
         }
diff --git a/src/core/services/utils/mimetype.ts b/src/core/services/utils/mimetype.ts
index d8e4610ed..c9fdd1fa1 100644
--- a/src/core/services/utils/mimetype.ts
+++ b/src/core/services/utils/mimetype.ts
@@ -302,14 +302,12 @@ export class CoreMimetypeUtilsProvider {
      */
     guessExtensionFromUrl(fileUrl: string): string | undefined {
         const split = fileUrl.split('.');
-        let candidate;
-        let extension;
-        let position;
+        let extension: string | undefined;
 
         if (split.length > 1) {
-            candidate = split[split.length - 1].toLowerCase();
+            let candidate = split[split.length - 1].toLowerCase();
             // Remove params if any.
-            position = candidate.indexOf('?');
+            let position = candidate.indexOf('?');
             if (position > -1) {
                 candidate = candidate.substring(0, position);
             }
@@ -343,7 +341,7 @@ export class CoreMimetypeUtilsProvider {
      */
     getFileExtension(filename: string): string | undefined {
         const dot = filename.lastIndexOf('.');
-        let ext;
+        let ext: string | undefined;
 
         if (dot > -1) {
             ext = filename.substring(dot + 1).toLowerCase();
@@ -582,11 +580,10 @@ export class CoreMimetypeUtilsProvider {
      */
     removeExtension(path: string): string {
         const position = path.lastIndexOf('.');
-        let extension;
 
         if (position > -1) {
             // Check extension corresponds to a mimetype to know if it's valid.
-            extension = path.substring(position + 1).toLowerCase();
+            const extension = path.substring(position + 1).toLowerCase();
             if (this.getMimeType(extension) !== undefined) {
                 return path.substring(0, position); // Remove extension.
             }
diff --git a/src/core/services/utils/text.ts b/src/core/services/utils/text.ts
index 6c024c41a..265a8c889 100644
--- a/src/core/services/utils/text.ts
+++ b/src/core/services/utils/text.ts
@@ -741,7 +741,7 @@ export class CoreTextUtilsProvider {
      * @returns Treated text.
      */
     replaceArguments(text: string, replacements: Record<string, string> = {}, encoding?: 'uri'): string {
-        let match;
+        let match: RegExpMatchArray | null = null;
 
         while ((match = text.match(/\{\{([^}]+)\}\}/))) {
             const argument = match[1].trim();
@@ -829,7 +829,7 @@ export class CoreTextUtilsProvider {
     /**
      * Replace @@PLUGINFILE@@ wildcards with the real URL in a text.
      *
-     * @param Text to treat.
+     * @param text to treat.
      * @param files Files to extract the pluginfile URL from. They need to have the URL in a url or fileurl attribute.
      * @return Treated text.
      */
@@ -847,8 +847,10 @@ export class CoreTextUtilsProvider {
     /**
      * Restore original draftfile URLs.
      *
-     * @param text Text to treat, including pluginfile URLs.
-     * @param replaceMap Map of the replacements that were done.
+     * @param siteUrl Site URL.
+     * @param treatedText Treated text with replacements.
+     * @param originalText Original text.
+     * @param files List of files to search and replace.
      * @return Treated text.
      */
     restoreDraftfileUrls(siteUrl: string, treatedText: string, originalText: string, files: CoreWSFile[]): string {
@@ -1053,7 +1055,6 @@ export class CoreTextUtilsProvider {
      *
      * @param title Title of the new state.
      * @param content Content of the text to be expanded.
-     * @param component Component to link the embedded files to.
      * @param options Options.
      * @return Promise resolved when the modal is displayed.
      */
diff --git a/src/core/services/utils/time.ts b/src/core/services/utils/time.ts
index bbc4a3e19..e664bb5b8 100644
--- a/src/core/services/utils/time.ts
+++ b/src/core/services/utils/time.ts
@@ -170,7 +170,7 @@ export class CoreTimeUtilsProvider {
     /**
      * Converts a number of seconds into a short human readable format: minutes and seconds, in fromat: 3' 27''.
      *
-     * @param seconds Seconds
+     * @param duration Seconds
      * @return Short human readable text.
      * @deprecated since app 4.0. Use CoreTime.formatTimeShort instead.
      */
diff --git a/src/core/services/utils/url.ts b/src/core/services/utils/url.ts
index 282a1c4fc..15ef3c685 100644
--- a/src/core/services/utils/url.ts
+++ b/src/core/services/utils/url.ts
@@ -544,7 +544,7 @@ export class CoreUrlUtilsProvider {
         url = url.replace(/\/webservice\/pluginfile\.php\//, '/pluginfile.php/');
 
         // Make sure the URL doesn't contain the token.
-        url.replace(/([?&])token=[^&]*&?/, '$1');
+        url = url.replace(/([?&])token=[^&]*&?/, '$1');
 
         return url;
     }
diff --git a/src/core/services/utils/utils.ts b/src/core/services/utils/utils.ts
index 27e73a7da..58431922a 100644
--- a/src/core/services/utils/utils.ts
+++ b/src/core/services/utils/utils.ts
@@ -37,7 +37,7 @@ import { CoreColors } from '@singletons/colors';
 import { CorePromisedValue } from '@classes/promised-value';
 import { CorePlatform } from '@services/platform';
 
-type TreeNode<T> = T & { children: TreeNode<T>[] };
+export type TreeNode<T> = T & { children: TreeNode<T>[] };
 
 /*
  * "Utils" service with helper functions.
@@ -486,7 +486,7 @@ export class CoreUtilsProvider {
      * @param ...args All the params sent after checkAll will be passed to isEnabledFn.
      * @return Promise resolved with the list of enabled sites.
      */
-    filterEnabledSites<P extends unknown[]>(
+    async filterEnabledSites<P extends unknown[]>(
         siteIds: string[],
         isEnabledFn: (siteId, ...args: P) => boolean | Promise<boolean>,
         checkAll?: boolean,
@@ -507,16 +507,14 @@ export class CoreUtilsProvider {
             }
         }
 
-        return this.allPromises(promises).catch(() => {
-            // Ignore errors.
-        }).then(() => {
-            if (!checkAll) {
-                // Checking 1 was enough, so it will either return all the sites or none.
-                return enabledSites.length ? siteIds : [];
-            } else {
-                return enabledSites;
-            }
-        });
+        await CoreUtils.ignoreErrors(this.allPromises(promises));
+
+        if (!checkAll) {
+            // Checking 1 was enough, so it will either return all the sites or none.
+            return enabledSites.length ? siteIds : [];
+        } else {
+            return enabledSites;
+        }
     }
 
     /**
@@ -562,18 +560,30 @@ export class CoreUtilsProvider {
         const mapDepth = {};
         const tree: TreeNode<T>[] = [];
 
+        // Create a map first to avoid problems with not sorted.
         list.forEach((node: TreeNode<T>, index): void => {
             const id = node[idFieldName];
-            const parent = node[parentFieldName];
-            node.children = [];
 
-            if (!id || !parent) {
+            if (id === undefined) {
+                this.logger.error(`Node with incorrect ${idFieldName}:${id} found on formatTree`);
+            }
+
+            if (node.children === undefined) {
+                node.children = [];
+            }
+            map[id] = index;
+        });
+
+        list.forEach((node: TreeNode<T>): void => {
+            const id = node[idFieldName];
+            const parent = node[parentFieldName];
+
+            if (id === undefined || parent === undefined) {
                 this.logger.error(`Node with incorrect ${idFieldName}:${id} or ${parentFieldName}:${parent} found on formatTree`);
             }
 
             // Use map to look-up the parents.
-            map[id] = index;
-            if (parent != rootParentId) {
+            if (parent !== rootParentId) {
                 const parentNode = list[map[parent]] as TreeNode<T>;
                 if (parentNode) {
                     if (mapDepth[parent] == maxDepth) {
@@ -627,21 +637,21 @@ export class CoreUtilsProvider {
      *
      * @return Promise resolved with the list of countries.
      */
-    getCountryList(): Promise<Record<string, string>> {
+    async getCountryList(): Promise<Record<string, string>> {
         // Get the keys of the countries.
-        return this.getCountryKeysList().then((keys) => {
-            // Now get the code and the translated name.
-            const countries = {};
+        const keys = await this.getCountryKeysList();
 
-            keys.forEach((key) => {
-                if (key.indexOf('assets.countries.') === 0) {
-                    const code = key.replace('assets.countries.', '');
-                    countries[code] = Translate.instant(key);
-                }
-            });
+        // Now get the code and the translated name.
+        const countries: Record<string, string> = {};
 
-            return countries;
+        keys.forEach((key) => {
+            if (key.indexOf('assets.countries.') === 0) {
+                const code = key.replace('assets.countries.', '');
+                countries[code] = Translate.instant(key);
+            }
         });
+
+        return countries;
     }
 
     /**
@@ -649,18 +659,14 @@ export class CoreUtilsProvider {
      *
      * @return Promise resolved with the list of countries.
      */
-    getCountryListSorted(): Promise<CoreCountry[]> {
+    async getCountryListSorted(): Promise<CoreCountry[]> {
         // Get the keys of the countries.
-        return this.getCountryList().then((countries) => {
-            // Sort translations.
-            const sortedCountries: { code: string; name: string }[] = [];
+        const countries = await this.getCountryList();
 
-            Object.keys(countries).sort((a, b) => countries[a].localeCompare(countries[b])).forEach((key) => {
-                sortedCountries.push({ code: key, name: countries[key] });
-            });
-
-            return sortedCountries;
-        });
+        // Sort translations.
+        return Object.keys(countries)
+            .sort((a, b) => countries[a].localeCompare(countries[b]))
+            .map((code) => ({ code, name: countries[code] }));
     }
 
     /**
@@ -668,11 +674,13 @@ export class CoreUtilsProvider {
      *
      * @return Promise resolved with the countries list. Rejected if not translated.
      */
-    protected getCountryKeysList(): Promise<string[]> {
+    protected async getCountryKeysList(): Promise<string[]> {
         // It's possible that the current language isn't translated, so try with default language first.
         const defaultLang = CoreLang.getDefaultLanguage();
 
-        return this.getCountryKeysListForLanguage(defaultLang).catch(() => {
+        try {
+            return await this.getCountryKeysListForLanguage(defaultLang);
+        } catch {
             // Not translated, try to use the fallback language.
             const fallbackLang = CoreLang.getFallbackLanguage();
 
@@ -681,8 +689,8 @@ export class CoreUtilsProvider {
                 throw new Error('Countries not found.');
             }
 
-            return this.getCountryKeysListForLanguage(fallbackLang);
-        });
+            return await this.getCountryKeysListForLanguage(fallbackLang);
+        }
     }
 
     /**
@@ -720,17 +728,19 @@ export class CoreUtilsProvider {
      * @param url The URL of the file.
      * @return Promise resolved with the mimetype.
      */
-    getMimeTypeFromUrl(url: string): Promise<string> {
+    async getMimeTypeFromUrl(url: string): Promise<string> {
         // First check if it can be guessed from the URL.
         const extension = CoreMimetypeUtils.guessExtensionFromUrl(url);
-        const mimetype = extension && CoreMimetypeUtils.getMimeType(extension);
+        let mimetype = extension && CoreMimetypeUtils.getMimeType(extension);
 
         if (mimetype) {
-            return Promise.resolve(mimetype);
+            return mimetype;
         }
 
         // Can't be guessed, get the remote mimetype.
-        return CoreWS.getRemoteFileMimeType(url).then(mimetype => mimetype || '');
+        mimetype = await CoreWS.getRemoteFileMimeType(url);
+
+        return mimetype || '';
     }
 
     /**
@@ -760,7 +770,7 @@ export class CoreUtilsProvider {
     /**
      * Check if an unknown value is a FileEntry.
      *
-     * @param value Value to check.
+     * @param file Object to check.
      * @return Type guard indicating if the file is a FileEntry.
      */
     valueIsFileEntry(file: unknown): file is FileEntry {
@@ -1017,7 +1027,7 @@ export class CoreUtilsProvider {
         this.iabInstance = InAppBrowser.create(url, '_blank', options);
 
         if (CorePlatform.isMobile()) {
-            let loadStopSubscription;
+            let loadStopSubscription: Subscription | undefined;
             const loadStartUrls: string[] = [];
 
             // Trigger global events when a url is loaded or the window is closed. This is to make it work like in Ionic 1.
@@ -1708,7 +1718,7 @@ export class CoreUtilsProvider {
      * Ignore errors from a promise.
      *
      * @param promise Promise to ignore errors.
-     * @param fallbackResult Value to return if the promise is rejected.
+     * @param fallback Value to return if the promise is rejected.
      * @return Promise with ignored errors, resolving to the fallback result if provided.
      */
     async ignoreErrors<Result>(promise: Promise<Result>): Promise<Result | undefined>;