diff --git a/src/addons/mod/assign/classes/base-feedback-plugin-component.ts b/src/addons/mod/assign/classes/base-feedback-plugin-component.ts
index 31713b758..f2211a3bc 100644
--- a/src/addons/mod/assign/classes/base-feedback-plugin-component.ts
+++ b/src/addons/mod/assign/classes/base-feedback-plugin-component.ts
@@ -27,10 +27,10 @@ import { AddonModAssignAssign, AddonModAssignPlugin, AddonModAssignSubmission }
 })
 export class AddonModAssignFeedbackPluginBaseComponent implements IAddonModAssignFeedbackPluginComponent {
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
-    @Input() userId!: number; // The user ID of the submission.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) userId!: number; // The user ID of the submission.
     @Input() configs?: Record<string,string>; // The configs for the plugin.
     @Input() canEdit = false; // Whether the user can edit.
     @Input() edit = false; // Whether the user is editing.
diff --git a/src/addons/mod/assign/classes/base-submission-plugin-component.ts b/src/addons/mod/assign/classes/base-submission-plugin-component.ts
index 56f938d0b..b2251af07 100644
--- a/src/addons/mod/assign/classes/base-submission-plugin-component.ts
+++ b/src/addons/mod/assign/classes/base-submission-plugin-component.ts
@@ -23,9 +23,9 @@ import { AddonModAssignAssign, AddonModAssignPlugin, AddonModAssignSubmission }
 })
 export class AddonModAssignSubmissionPluginBaseComponent {
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
     @Input() configs?: Record<string, string>; // The configs for the plugin.
     @Input() edit = false; // Whether the user is editing.
     @Input() allowOffline = false; // Whether to allow offline.
diff --git a/src/addons/mod/assign/components/edit-feedback-modal/edit-feedback-modal.ts b/src/addons/mod/assign/components/edit-feedback-modal/edit-feedback-modal.ts
index 35682d76f..aafd35365 100644
--- a/src/addons/mod/assign/components/edit-feedback-modal/edit-feedback-modal.ts
+++ b/src/addons/mod/assign/components/edit-feedback-modal/edit-feedback-modal.ts
@@ -37,10 +37,10 @@ import { AddonModAssignComponentsModule } from '../components.module';
 })
 export class AddonModAssignEditFeedbackModalComponent {
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
-    @Input() userId!: number; // The user ID of the submission.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) userId!: number; // The user ID of the submission.
 
     @ViewChild('editFeedbackForm') formElement?: ElementRef;
 
diff --git a/src/addons/mod/assign/components/feedback-plugin/feedback-plugin.ts b/src/addons/mod/assign/components/feedback-plugin/feedback-plugin.ts
index 136e991b5..dbec8e19d 100644
--- a/src/addons/mod/assign/components/feedback-plugin/feedback-plugin.ts
+++ b/src/addons/mod/assign/components/feedback-plugin/feedback-plugin.ts
@@ -37,10 +37,10 @@ export class AddonModAssignFeedbackPluginComponent implements OnInit {
 
     @ViewChild(CoreDynamicComponent) dynamicComponent!: CoreDynamicComponent<IAddonModAssignFeedbackPluginComponent>;
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
-    @Input() userId!: number; // The user ID of the submission.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) userId!: number; // The user ID of the submission.
     @Input() canEdit = false; // Whether the user can edit.
     @Input() edit = false; // Whether the user is editing.
 
diff --git a/src/addons/mod/assign/components/submission-plugin/submission-plugin.ts b/src/addons/mod/assign/components/submission-plugin/submission-plugin.ts
index 93210b120..929bf34a4 100644
--- a/src/addons/mod/assign/components/submission-plugin/submission-plugin.ts
+++ b/src/addons/mod/assign/components/submission-plugin/submission-plugin.ts
@@ -37,9 +37,9 @@ export class AddonModAssignSubmissionPluginComponent implements OnInit {
 
     @ViewChild(CoreDynamicComponent) dynamicComponent!: CoreDynamicComponent<AddonModAssignSubmissionPluginBaseComponent>;
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
     @Input() edit = false; // Whether the user is editing.
     @Input() allowOffline = false; // Whether to allow offline.
 
diff --git a/src/addons/mod/assign/components/submission/submission.ts b/src/addons/mod/assign/components/submission/submission.ts
index 420b69701..5d4148030 100644
--- a/src/addons/mod/assign/components/submission/submission.ts
+++ b/src/addons/mod/assign/components/submission/submission.ts
@@ -82,9 +82,9 @@ export class AddonModAssignSubmissionComponent implements OnInit, OnDestroy, Can
     @ViewChildren(AddonModAssignSubmissionPluginComponent) submissionComponents!:
         QueryList<AddonModAssignSubmissionPluginComponent>;
 
-    @Input() courseId!: number; // Course ID the submission belongs to.
-    @Input() moduleId!: number; // Module ID the submission belongs to.
-    @Input() submitId!: number; // User that did the submission.
+    @Input({ required: true }) courseId!: number; // Course ID the submission belongs to.
+    @Input({ required: true }) moduleId!: number; // Module ID the submission belongs to.
+    @Input() submitId!: number; // User that did the submission. Defaults to current user
     @Input() blindId?: number; // Blinded user ID (if it's blinded).
 
     loaded = false; // Whether data has been loaded.
diff --git a/src/addons/mod/chat/components/users-modal/users-modal.ts b/src/addons/mod/chat/components/users-modal/users-modal.ts
index 1ebd510e7..6f40a45fd 100644
--- a/src/addons/mod/chat/components/users-modal/users-modal.ts
+++ b/src/addons/mod/chat/components/users-modal/users-modal.ts
@@ -33,8 +33,8 @@ import { CoreSharedModule } from '@/core/shared.module';
 })
 export class AddonModChatUsersModalComponent implements OnInit, OnDestroy {
 
-    @Input() sessionId!: string;
-    @Input() cmId!: number;
+    @Input({ required: true }) sessionId!: string;
+    @Input({ required: true }) cmId!: number;
 
     users: AddonModChatUser[] = [];
     usersLoaded = false;
diff --git a/src/addons/mod/data/classes/base-field-plugin-component.ts b/src/addons/mod/data/classes/base-field-plugin-component.ts
index 93483a028..72a64b03c 100644
--- a/src/addons/mod/data/classes/base-field-plugin-component.ts
+++ b/src/addons/mod/data/classes/base-field-plugin-component.ts
@@ -26,8 +26,8 @@ import { AddonModDataTemplateMode } from '../constants';
 })
 export abstract class AddonModDataFieldPluginBaseComponent implements OnInit, OnChanges {
 
-    @Input() mode!: AddonModDataTemplateMode; // The render mode.
-    @Input() field!: AddonModDataField; // The field to render.
+    @Input({ required: true }) mode!: AddonModDataTemplateMode; // The render mode.
+    @Input({ required: true }) field!: AddonModDataField; // The field to render.
     @Input() value?: Partial<AddonModDataEntryField>; // The value of the field.
     @Input() database?: AddonModDataData; // Database object.
     @Input() error?: string; // Error when editing.
diff --git a/src/addons/mod/data/components/action/action.ts b/src/addons/mod/data/components/action/action.ts
index 10022f9f8..57a9da66d 100644
--- a/src/addons/mod/data/components/action/action.ts
+++ b/src/addons/mod/data/components/action/action.ts
@@ -45,10 +45,10 @@ import {
 export class AddonModDataActionComponent implements OnInit {
 
     @Input() access?: AddonModDataGetDataAccessInformationWSResponse; // Access info.
-    @Input() mode!: AddonModDataTemplateMode; // The render mode.
-    @Input() action!: AddonModDataAction; // The field to render.
-    @Input() entry!: AddonModDataEntry; // The value of the field.
-    @Input() database!: AddonModDataData; // Database object.
+    @Input({ required: true }) mode!: AddonModDataTemplateMode; // The render mode.
+    @Input({ required: true }) action!: AddonModDataAction; // The field to render.
+    @Input({ required: true }) entry!: AddonModDataEntry; // The value of the field.
+    @Input({ required: true }) database!: AddonModDataData; // Database object.
     @Input() title = ''; // Name of the module.
     @Input() group = 0; // Module group.
     @Input() offset?: number; // Offset of the entry.
diff --git a/src/addons/mod/data/components/field-plugin/field-plugin.ts b/src/addons/mod/data/components/field-plugin/field-plugin.ts
index 3527ccee3..f364c1a67 100644
--- a/src/addons/mod/data/components/field-plugin/field-plugin.ts
+++ b/src/addons/mod/data/components/field-plugin/field-plugin.ts
@@ -32,8 +32,8 @@ export class AddonModDataFieldPluginComponent implements OnInit, OnChanges {
 
     @ViewChild(CoreDynamicComponent) dynamicComponent?: CoreDynamicComponent<AddonModDataFieldPluginBaseComponent>;
 
-    @Input() mode!: AddonModDataTemplateMode; // The render mode.
-    @Input() field!: AddonModDataField; // The field to render.
+    @Input({ required: true }) mode!: AddonModDataTemplateMode; // The render mode.
+    @Input({ required: true }) field!: AddonModDataField; // The field to render.
     @Input() value?: unknown; // The value of the field.
     @Input() database?: AddonModDataData; // Database object.
     @Input() error?: string; // Error when editing.
diff --git a/src/addons/mod/data/components/search-modal/search-modal.ts b/src/addons/mod/data/components/search-modal/search-modal.ts
index 2867c9fea..9f7cf1086 100644
--- a/src/addons/mod/data/components/search-modal/search-modal.ts
+++ b/src/addons/mod/data/components/search-modal/search-modal.ts
@@ -50,9 +50,9 @@ export class AddonModDataSearchModalComponent implements OnInit {
 
     @ViewChild('searchFormEl') formElement!: ElementRef;
 
-    @Input() search!: AddonModDataSearchDataParams;
-    @Input() fields!: Record<number, AddonModDataField>;
-    @Input() database!: AddonModDataData;
+    @Input({ required: true }) search!: AddonModDataSearchDataParams;
+    @Input({ required: true }) fields!: Record<number, AddonModDataField>;
+    @Input({ required: true }) database!: AddonModDataData;
 
     advancedSearch = '';
     advancedIndexed: CoreFormFields = {};
diff --git a/src/addons/mod/forum/components/discussion-options-menu/discussion-options-menu.ts b/src/addons/mod/forum/components/discussion-options-menu/discussion-options-menu.ts
index 0eb646d2d..91e3041fa 100644
--- a/src/addons/mod/forum/components/discussion-options-menu/discussion-options-menu.ts
+++ b/src/addons/mod/forum/components/discussion-options-menu/discussion-options-menu.ts
@@ -30,9 +30,9 @@ import { CoreToasts } from '@services/toasts';
 })
 export class AddonModForumDiscussionOptionsMenuComponent implements OnInit {
 
-    @Input() discussion!: AddonModForumDiscussion; // The discussion.
-    @Input() forumId!: number; // The forum Id.
-    @Input() cmId!: number; // The component module Id.
+    @Input({ required: true }) discussion!: AddonModForumDiscussion; // The discussion.
+    @Input({ required: true }) forumId!: number; // The forum Id.
+    @Input({ required: true }) cmId!: number; // The component module Id.
 
     canPin = false;
 
diff --git a/src/addons/mod/forum/components/post-options-menu/post-options-menu.ts b/src/addons/mod/forum/components/post-options-menu/post-options-menu.ts
index 8dccdcb02..e7f44e28b 100644
--- a/src/addons/mod/forum/components/post-options-menu/post-options-menu.ts
+++ b/src/addons/mod/forum/components/post-options-menu/post-options-menu.ts
@@ -30,9 +30,9 @@ import { CoreNetworkError } from '@classes/errors/network-error';
 })
 export class AddonModForumPostOptionsMenuComponent implements OnInit {
 
-    @Input() post!: AddonModForumPost; // The post.
-    @Input() cmId!: number;
-    @Input() forumId!: number; // The forum Id.
+    @Input({ required: true }) post!: AddonModForumPost; // The post.
+    @Input({ required: true }) cmId!: number;
+    @Input({ required: true }) forumId!: number; // The forum Id.
 
     canEdit = false;
     canDelete = false;
diff --git a/src/addons/mod/forum/components/post/post.ts b/src/addons/mod/forum/components/post/post.ts
index 759782675..496b313b8 100644
--- a/src/addons/mod/forum/components/post/post.ts
+++ b/src/addons/mod/forum/components/post/post.ts
@@ -65,17 +65,17 @@ import { CoreToasts } from '@services/toasts';
 })
 export class AddonModForumPostComponent implements OnInit, OnDestroy, OnChanges {
 
-    @Input() post!: AddonModForumPost; // Post.
-    @Input() courseId!: number; // Post's course ID.
-    @Input() discussionId!: number; // Post's' discussion ID.
+    @Input({ required: true }) post!: AddonModForumPost; // Post.
+    @Input({ required: true }) courseId!: number; // Post's course ID.
+    @Input({ required: true }) discussionId!: number; // Post's' discussion ID.
     @Input() discussion?: AddonModForumDiscussion; // Post's' discussion, only for starting posts.
-    @Input() component!: string; // Component this post belong to.
-    @Input() componentId!: number; // Component ID.
-    @Input() formData!: AddonModForumSharedPostFormData; // Object with the new post data. Usually shared between posts.
-    @Input() originalData!: Omit<AddonModForumPostFormData, 'id'>; // Original post data. Usually shared between posts.
-    @Input() trackPosts!: boolean; // True if post is being tracked.
-    @Input() forum!: AddonModForumData; // The forum the post belongs to. Required for attachments and offline posts.
-    @Input() accessInfo!: AddonModForumAccessInformation; // Forum access information.
+    @Input({ required: true }) component!: string; // Component this post belong to.
+    @Input({ required: true }) componentId!: number; // Component ID.
+    @Input({ required: true }) formData!: AddonModForumSharedPostFormData; // New post data. Usually shared between posts.
+    @Input({ required: true }) originalData!: Omit<AddonModForumPostFormData, 'id'>; // Original data. Usually shared between posts.
+    @Input({ required: true }) trackPosts!: boolean; // True if post is being tracked.
+    @Input({ required: true }) forum!: AddonModForumData; // The forum the post belongs to.
+    @Input({ required: true }) accessInfo!: AddonModForumAccessInformation; // Forum access information.
     @Input() parentSubject?: string; // Subject of parent post.
     @Input() ratingInfo?: CoreRatingInfo; // Rating info item.
     @Input() leavingPage?: boolean; // Whether the page that contains this post is being left and will be destroyed.
diff --git a/src/addons/mod/quiz/components/attempt-info/attempt-info.ts b/src/addons/mod/quiz/components/attempt-info/attempt-info.ts
index 25c0498ac..4e6ef30c6 100644
--- a/src/addons/mod/quiz/components/attempt-info/attempt-info.ts
+++ b/src/addons/mod/quiz/components/attempt-info/attempt-info.ts
@@ -30,8 +30,8 @@ import { isSafeNumber } from '@/core/utils/types';
 })
 export class AddonModQuizAttemptInfoComponent implements OnChanges {
 
-    @Input() quiz!: AddonModQuizQuizData;
-    @Input() attempt!: AddonModQuizAttempt;
+    @Input({ required: true }) quiz!: AddonModQuizQuizData;
+    @Input({ required: true }) attempt!: AddonModQuizAttempt;
     @Input() additionalData?: AddonModQuizWSAdditionalData[]; // Additional data to display for the attempt.
 
     isFinished = false;
diff --git a/src/addons/mod/quiz/components/preflight-modal/preflight-modal.ts b/src/addons/mod/quiz/components/preflight-modal/preflight-modal.ts
index 4ec740b22..59d06ca32 100644
--- a/src/addons/mod/quiz/components/preflight-modal/preflight-modal.ts
+++ b/src/addons/mod/quiz/components/preflight-modal/preflight-modal.ts
@@ -39,12 +39,12 @@ export class AddonModQuizPreflightModalComponent implements OnInit {
 
     @ViewChild('preflightFormEl') formElement?: ElementRef;
 
-    @Input() title!: string;
+    @Input({ required: true }) title!: string;
     @Input() quiz?: AddonModQuizQuizWSData;
     @Input() attempt?: AddonModQuizAttemptWSData;
     @Input() prefetch?: boolean;
-    @Input() siteId!: string;
-    @Input() rules!: string[];
+    @Input({ required: true }) siteId!: string;
+    @Input({ required: true }) rules!: string[];
 
     preflightForm: FormGroup;
     accessRulesData: { component: Type<unknown>; data: Record<string, unknown>}[] = []; // Component and data for each access rule.
diff --git a/src/addons/mod/quiz/components/question-card/question-card.ts b/src/addons/mod/quiz/components/question-card/question-card.ts
index 0f6c4c87a..b89c912cb 100644
--- a/src/addons/mod/quiz/components/question-card/question-card.ts
+++ b/src/addons/mod/quiz/components/question-card/question-card.ts
@@ -25,6 +25,6 @@ import { CoreQuestionQuestionForView } from '@features/question/services/questio
 })
 export class AddonModQuizQuestionCardComponent {
 
-    @Input() question!: CoreQuestionQuestionForView;
+    @Input({ required: true }) question!: CoreQuestionQuestionForView;
 
 }
diff --git a/src/addons/mod/scorm/components/toc/toc.ts b/src/addons/mod/scorm/components/toc/toc.ts
index 42199ba11..f91d0bbcf 100644
--- a/src/addons/mod/scorm/components/toc/toc.ts
+++ b/src/addons/mod/scorm/components/toc/toc.ts
@@ -35,9 +35,9 @@ export class AddonModScormTocComponent implements OnInit {
     @Input() toc: AddonModScormTOCScoWithIcon[] = [];
     @Input() attemptToContinue?: number;
     @Input() selected?: number;
-    @Input() moduleId!: number;
-    @Input() courseId!: number;
-    @Input() accessInfo!: AddonModScormGetScormAccessInformationWSResponse;
+    @Input({ required: true }) moduleId!: number;
+    @Input({ required: true }) courseId!: number;
+    @Input({ required: true }) accessInfo!: AddonModScormGetScormAccessInformationWSResponse;
     @Input() mode = '';
 
     isBrowse = false;
diff --git a/src/addons/mod/wiki/components/subwiki-picker/subwiki-picker.ts b/src/addons/mod/wiki/components/subwiki-picker/subwiki-picker.ts
index 878d918d3..adfb4821a 100644
--- a/src/addons/mod/wiki/components/subwiki-picker/subwiki-picker.ts
+++ b/src/addons/mod/wiki/components/subwiki-picker/subwiki-picker.ts
@@ -32,7 +32,7 @@ export class AddonModWikiSubwikiPickerComponent {
 
     @Input() courseId?: number;
     @Input() subwikis: AddonModWikiSubwikiListGrouping[] = [];
-    @Input() currentSubwiki!: AddonModWikiSubwiki;
+    @Input({ required: true }) currentSubwiki!: AddonModWikiSubwiki;
 
     /**
      * Checks if the given subwiki is the one currently selected.
diff --git a/src/addons/mod/workshop/classes/assessment-strategy-component.ts b/src/addons/mod/workshop/classes/assessment-strategy-component.ts
index 1e9c85548..6d0f5780b 100644
--- a/src/addons/mod/workshop/classes/assessment-strategy-component.ts
+++ b/src/addons/mod/workshop/classes/assessment-strategy-component.ts
@@ -24,13 +24,13 @@ import { AddonModWorkshopSubmissionAssessmentWithFormData } from '../services/wo
 })
 export class AddonModWorkshopAssessmentStrategyBaseComponent {
 
-    @Input() workshopId!: number;
-    @Input() assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
-    @Input() edit!: boolean;
-    @Input() selectedValues!: AddonModWorkshopGetAssessmentFormFieldsParsedData[];
-    @Input() fieldErrors!: Record<string, string>;
-    @Input() strategy!: string;
-    @Input() moduleId!: number;
+    @Input({ required: true }) workshopId!: number;
+    @Input({ required: true }) assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
+    @Input({ required: true }) edit!: boolean;
+    @Input({ required: true }) selectedValues!: AddonModWorkshopGetAssessmentFormFieldsParsedData[];
+    @Input({ required: true }) fieldErrors!: Record<string, string>;
+    @Input({ required: true }) strategy!: string;
+    @Input({ required: true }) moduleId!: number;
     @Input() courseId?: number;
 
 }
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 503174cf5..1e6709cfa 100644
--- a/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
+++ b/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
@@ -52,11 +52,11 @@ import {
 })
 export class AddonModWorkshopAssessmentStrategyComponent implements OnInit, OnDestroy {
 
-    @Input() workshop!: AddonModWorkshopData;
-    @Input() access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
-    @Input() assessmentId!: number;
-    @Input() userId!: number;
-    @Input() strategy!: string;
+    @Input({ required: true }) workshop!: AddonModWorkshopData;
+    @Input({ required: true }) access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
+    @Input({ required: true }) assessmentId!: number;
+    @Input({ required: true }) userId!: number;
+    @Input({ required: true }) strategy!: string;
     @Input() edit = false;
 
     @ViewChild('assessmentForm') formElement!: ElementRef;
diff --git a/src/addons/mod/workshop/components/assessment/assessment.ts b/src/addons/mod/workshop/components/assessment/assessment.ts
index 1e6464bc0..6fac33bd2 100644
--- a/src/addons/mod/workshop/components/assessment/assessment.ts
+++ b/src/addons/mod/workshop/components/assessment/assessment.ts
@@ -36,12 +36,12 @@ import { AddonModWorkshopOffline } from '../../services/workshop-offline';
 })
 export class AddonModWorkshopAssessmentComponent implements OnInit {
 
-    @Input() assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
-    @Input() courseId!: number;
-    @Input() workshop!: AddonModWorkshopData;
-    @Input() access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
-    @Input() submission!: AddonModWorkshopSubmissionDataWithOfflineData;
-    @Input() module!: CoreCourseModuleData;
+    @Input({ required: true }) assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
+    @Input({ required: true }) courseId!: number;
+    @Input({ required: true }) workshop!: AddonModWorkshopData;
+    @Input({ required: true }) access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
+    @Input({ required: true }) submission!: AddonModWorkshopSubmissionDataWithOfflineData;
+    @Input({ required: true }) module!: CoreCourseModuleData;
 
     canViewAssessment = false;
     canSelfAssess = false;
diff --git a/src/addons/mod/workshop/components/phase-modal/phase-modal.ts b/src/addons/mod/workshop/components/phase-modal/phase-modal.ts
index 95bc52faa..c437404ec 100644
--- a/src/addons/mod/workshop/components/phase-modal/phase-modal.ts
+++ b/src/addons/mod/workshop/components/phase-modal/phase-modal.ts
@@ -31,10 +31,10 @@ import { CoreSharedModule } from '@/core/shared.module';
 })
 export class AddonModWorkshopPhaseInfoModalComponent implements OnInit {
 
-    @Input() phases!: AddonModWorkshopPhaseDataWithSwitch[];
-    @Input() workshopPhase!: AddonModWorkshopPhase;
+    @Input({ required: true }) phases!: AddonModWorkshopPhaseDataWithSwitch[];
+    @Input({ required: true }) workshopPhase!: AddonModWorkshopPhase;
     @Input() showSubmit = false;
-    @Input() externalUrl!: string;
+    @Input({ required: true }) externalUrl!: string;
 
     ngOnInit(): void {
 
diff --git a/src/addons/mod/workshop/components/submission/submission.ts b/src/addons/mod/workshop/components/submission/submission.ts
index 53ae4a891..6dfbe5226 100644
--- a/src/addons/mod/workshop/components/submission/submission.ts
+++ b/src/addons/mod/workshop/components/submission/submission.ts
@@ -41,11 +41,11 @@ import { ADDON_MOD_WORKSHOP_COMPONENT, ADDON_MOD_WORKSHOP_PAGE_NAME, AddonModWor
 })
 export class AddonModWorkshopSubmissionComponent implements OnInit {
 
-    @Input() submission!: AddonModWorkshopSubmissionDataWithOfflineData;
-    @Input() module!: CoreCourseModuleData;
-    @Input() workshop!: AddonModWorkshopData;
-    @Input() access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
-    @Input() courseId!: number;
+    @Input({ required: true }) submission!: AddonModWorkshopSubmissionDataWithOfflineData;
+    @Input({ required: true }) module!: CoreCourseModuleData;
+    @Input({ required: true }) workshop!: AddonModWorkshopData;
+    @Input({ required: true }) access!: AddonModWorkshopGetWorkshopAccessInformationWSResponse;
+    @Input({ required: true }) courseId!: number;
     @Input() assessment?: AddonModWorkshopSubmissionAssessmentWithFormData;
     @Input() summary = false;
 
diff --git a/src/addons/mod/workshop/pages/submission/submission.html b/src/addons/mod/workshop/pages/submission/submission.html
index dde29a697..0a4ed5029 100644
--- a/src/addons/mod/workshop/pages/submission/submission.html
+++ b/src/addons/mod/workshop/pages/submission/submission.html
@@ -88,8 +88,8 @@
                     <h2>{{ 'addon.mod_workshop.givengrades' | translate }}</h2>
                 </ion-label>
             </ion-item-divider>
-            <addon-mod-workshop-assessment *ngFor="let reviewer of submissionInfo.reviewerof" [assessment]="reviewer" [courseId]="courseId"
-                [module]="module" [workshop]="workshop" [access]="access" />
+            <addon-mod-workshop-assessment *ngFor="let reviewer of submissionInfo.reviewerof" [submission]="submission"
+                [assessment]="reviewer" [courseId]="courseId" [module]="module" [workshop]="workshop" [access]="access" />
         </ion-list>
 
         <form [formGroup]="feedbackForm" *ngIf="canAddFeedback && submission" #feedbackFormEl>
diff --git a/src/addons/notes/components/add/add-modal.ts b/src/addons/notes/components/add/add-modal.ts
index 337b97dc6..c4c12b786 100644
--- a/src/addons/notes/components/add/add-modal.ts
+++ b/src/addons/notes/components/add/add-modal.ts
@@ -36,7 +36,7 @@ export class AddonNotesAddComponent {
 
     @ViewChild('itemEdit') formElement?: ElementRef;
 
-    @Input() courseId!: number;
+    @Input({ required: true }) courseId!: number;
     @Input() userId?: number;
     @Input() type: AddonNotesPublishState = 'personal';
     text = '';
diff --git a/src/core/components/course-image/course-image.ts b/src/core/components/course-image/course-image.ts
index dc440b81a..16be9d569 100644
--- a/src/core/components/course-image/course-image.ts
+++ b/src/core/components/course-image/course-image.ts
@@ -24,7 +24,7 @@ import { CoreColors } from '@singletons/colors';
 })
 export class CoreCourseImageComponent implements OnInit, OnChanges {
 
-    @Input() course!: CoreCourseListItem;
+    @Input({ required: true }) course!: CoreCourseListItem;
     @Input() fill = false;
 
     protected element: HTMLElement;
diff --git a/src/core/components/group-selector/group-selector.ts b/src/core/components/group-selector/group-selector.ts
index 41dbcfe29..df9139a34 100644
--- a/src/core/components/group-selector/group-selector.ts
+++ b/src/core/components/group-selector/group-selector.ts
@@ -34,7 +34,7 @@ export class CoreGroupSelectorComponent {
 
     @Input() groupInfo?: CoreGroupInfo;
     @Input() multipleGroupsMessage?: string;
-    @Input() selected!: number;
+    @Input({ required: true }) selected!: number;
     @Input() courseId?: number;
     @Output() selectedChange = new EventEmitter<number>();
 
diff --git a/src/core/components/infinite-loading/infinite-loading.ts b/src/core/components/infinite-loading/infinite-loading.ts
index 49103a3df..8999b0093 100644
--- a/src/core/components/infinite-loading/infinite-loading.ts
+++ b/src/core/components/infinite-loading/infinite-loading.ts
@@ -30,7 +30,7 @@ const THRESHOLD = .15; // % of the scroll element height that must be close to t
 })
 export class CoreInfiniteLoadingComponent implements OnChanges {
 
-    @Input() enabled!: boolean;
+    @Input({ required: true }) enabled!: boolean;
     @Input() error = false;
     @Input() position: 'top' | 'bottom' = 'bottom';
     @Output() action: EventEmitter<() => void>; // Will emit an event when triggered.
diff --git a/src/core/components/progress-bar/progress-bar.ts b/src/core/components/progress-bar/progress-bar.ts
index 932e63ddc..1d30c770c 100644
--- a/src/core/components/progress-bar/progress-bar.ts
+++ b/src/core/components/progress-bar/progress-bar.ts
@@ -30,7 +30,7 @@ import { DomSanitizer, Translate } from '@singletons';
 })
 export class CoreProgressBarComponent implements OnChanges {
 
-    @Input() progress!: number | string; // Percentage from 0 to 100. Negative number will show an indeterminate progress bar.
+    @Input({ required: true }) progress!: number | string; // Percentage (0 to 100). Negative number will show an indeterminate bar.
     @Input() text?: string; // Percentage in text to be shown at the right. If not defined, progress will be used.
     @Input() a11yText?: string; // Accessibility text to read before the percentage.
     @Input() ariaDescribedBy?: string; // ID of the element that described the progress, if any.
diff --git a/src/core/components/sheet-modal/sheet-modal.ts b/src/core/components/sheet-modal/sheet-modal.ts
index e93409c7c..af8ce0f17 100644
--- a/src/core/components/sheet-modal/sheet-modal.ts
+++ b/src/core/components/sheet-modal/sheet-modal.ts
@@ -28,7 +28,7 @@ import { CoreDirectivesRegistry } from '@singletons/directives-registry';
 })
 export class CoreSheetModalComponent<T extends CoreModalComponent> implements AfterViewInit {
 
-    @Input() component!: Constructor<T>;
+    @Input({ required: true }) component!: Constructor<T>;
     @Input() componentProps?: Record<string, unknown>;
     @ViewChild('wrapper') wrapper?: ElementRef<HTMLElement>;
 
diff --git a/src/core/components/sites-list/sites-list.ts b/src/core/components/sites-list/sites-list.ts
index 0edb15b4f..d54d9d339 100644
--- a/src/core/components/sites-list/sites-list.ts
+++ b/src/core/components/sites-list/sites-list.ts
@@ -42,7 +42,7 @@ import { CoreSitesFactory } from '@services/sites-factory';
 })
 export class CoreSitesListComponent<T extends CoreSiteBasicInfo> {
 
-    @Input() accountsList!: CoreAccountsList<T>;
+    @Input({ required: true }) accountsList!: CoreAccountsList<T>;
     @Input() sitesClickable = false; // Whether the sites are clickable.
     @Input() currentSiteClickable?: boolean; // If set, specify a different clickable value for current site.
     @Output() onSiteClicked = new EventEmitter<T>();
diff --git a/src/core/components/tabs/tab.ts b/src/core/components/tabs/tab.ts
index dd276f647..a7294e67f 100644
--- a/src/core/components/tabs/tab.ts
+++ b/src/core/components/tabs/tab.ts
@@ -45,7 +45,7 @@ import { CoreTabsComponent } from './tabs';
 })
 export class CoreTabComponent implements OnInit, OnDestroy, CoreTabBase {
 
-    @Input() title!: string; // The tab title.
+    @Input({ required: true }) title!: string; // The tab title.
     @Input() icon?: string; // The tab icon.
     @Input() badge?: string; // A badge to add in the tab.
     @Input() badgeStyle?: string; // The badge color.
diff --git a/src/core/directives/user-tour.ts b/src/core/directives/user-tour.ts
index 04d3636ea..cb40cb38b 100644
--- a/src/core/directives/user-tour.ts
+++ b/src/core/directives/user-tour.ts
@@ -25,7 +25,7 @@ import { CoreDom } from '@singletons/dom';
 })
 export class CoreUserTourDirective implements OnInit, OnDestroy {
 
-    @Input() userTour!: CoreUserTourDirectiveOptions;
+    @Input({ required: true }) userTour!: CoreUserTourDirectiveOptions;
 
     private tour?: CoreUserToursUserTour | null;
     private element: HTMLElement;
diff --git a/src/core/features/block/classes/base-block-component.ts b/src/core/features/block/classes/base-block-component.ts
index 05bec595c..cfb6402c0 100644
--- a/src/core/features/block/classes/base-block-component.ts
+++ b/src/core/features/block/classes/base-block-component.ts
@@ -32,10 +32,10 @@ import { CorePromisedValue } from '@classes/promised-value';
 })
 export abstract class CoreBlockBaseComponent implements OnInit, OnChanges, ICoreBlockComponent, AsyncDirective {
 
-    @Input() title!: string; // The block title.
-    @Input() block!: CoreCourseBlock; // The block to render.
-    @Input() contextLevel!: ContextLevel; // The context where the block will be used.
-    @Input() instanceId!: number; // The instance ID associated with the context level.
+    @Input({ required: true }) title!: string; // The block title.
+    @Input({ required: true }) block!: CoreCourseBlock; // The block to render.
+    @Input({ required: true }) contextLevel!: ContextLevel; // The context where the block will be used.
+    @Input({ required: true }) instanceId!: number; // The instance ID associated with the context level.
     @Input() link?: string; // Link to go when clicked.
     @Input() linkParams?: Params; // Link params to go when clicked.
     @Input() navOptions?: CoreNavigationOptions; // Navigation options.
diff --git a/src/core/features/block/components/block/block.ts b/src/core/features/block/components/block/block.ts
index a89f4ee09..684e5c7cd 100644
--- a/src/core/features/block/components/block/block.ts
+++ b/src/core/features/block/components/block/block.ts
@@ -32,10 +32,10 @@ export class CoreBlockComponent implements OnChanges, OnDestroy {
 
     @ViewChild(CoreDynamicComponent) dynamicComponent?: CoreDynamicComponent<ICoreBlockComponent>;
 
-    @Input() block!: CoreCourseBlock; // The block to render.
-    @Input() contextLevel!: ContextLevel; // The context where the block will be used.
-    @Input() instanceId!: number; // The instance ID associated with the context level.
-    @Input() extraData!: Record<string, unknown>; // Any extra data to be passed to the block.
+    @Input({ required: true }) block!: CoreCourseBlock; // The block to render.
+    @Input({ required: true }) contextLevel!: ContextLevel; // The context where the block will be used.
+    @Input({ required: true }) instanceId!: number; // The instance ID associated with the context level.
+    @Input() extraData?: Record<string, unknown>; // Any extra data to be passed to the block.
     @Input() labelledBy?: string;
 
     componentClass?: Type<ICoreBlockComponent>; // The class of the component to render.
diff --git a/src/core/features/block/components/side-blocks-button/side-blocks-button.ts b/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
index a9d9f51ec..cf159c641 100644
--- a/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
+++ b/src/core/features/block/components/side-blocks-button/side-blocks-button.ts
@@ -31,8 +31,8 @@ import { ContextLevel } from '@/core/constants';
 })
 export class CoreBlockSideBlocksButtonComponent implements OnInit, OnDestroy {
 
-    @Input() contextLevel!: ContextLevel;
-    @Input() instanceId!: number;
+    @Input({ required: true }) contextLevel!: ContextLevel;
+    @Input({ required: true }) instanceId!: number;
     @Input() myDashboardPage?: string;
 
     userTour: CoreUserTourDirectiveOptions = {
diff --git a/src/core/features/block/components/side-blocks/side-blocks.ts b/src/core/features/block/components/side-blocks/side-blocks.ts
index d4ac02876..23eee8649 100644
--- a/src/core/features/block/components/side-blocks/side-blocks.ts
+++ b/src/core/features/block/components/side-blocks/side-blocks.ts
@@ -42,8 +42,8 @@ import { CoreBlockComponentsModule } from '../components.module';
 })
 export class CoreBlockSideBlocksComponent implements OnInit {
 
-    @Input() contextLevel!: ContextLevel;
-    @Input() instanceId!: number;
+    @Input({ required: true }) contextLevel!: ContextLevel;
+    @Input({ required: true }) instanceId!: number;
     @Input() initialBlockInstanceId?: number;
     @Input() myDashboardPage?: string;
 
diff --git a/src/core/features/comments/components/comments/comments.ts b/src/core/features/comments/components/comments/comments.ts
index d780b9ebb..e465839b4 100644
--- a/src/core/features/comments/components/comments/comments.ts
+++ b/src/core/features/comments/components/comments/comments.ts
@@ -33,10 +33,10 @@ import { ContextLevel } from '@/core/constants';
 })
 export class CoreCommentsCommentsComponent implements OnInit, OnChanges, OnDestroy {
 
-    @Input() contextLevel!: ContextLevel;
-    @Input() instanceId!: number;
-    @Input() component!: string;
-    @Input() itemId!: number;
+    @Input({ required: true }) contextLevel!: ContextLevel;
+    @Input({ required: true }) instanceId!: number;
+    @Input({ required: true }) component!: string;
+    @Input({ required: true }) itemId!: number;
     @Input() area = '';
     @Input() title?: string;
     @Output() onLoading = new EventEmitter<boolean>();  // Event that indicates whether the component is loading data.
diff --git a/src/core/features/compile/components/compile-html/compile-html.ts b/src/core/features/compile/components/compile-html/compile-html.ts
index 10c0c3d2a..76d453d89 100644
--- a/src/core/features/compile/components/compile-html/compile-html.ts
+++ b/src/core/features/compile/components/compile-html/compile-html.ts
@@ -63,7 +63,7 @@ import { CoreDom } from '@singletons/dom';
 })
 export class CoreCompileHtmlComponent implements OnChanges, OnDestroy, DoCheck {
 
-    @Input() text!: string; // The HTML text to display.
+    @Input({ required: true }) text!: string; // The HTML text to display.
     @Input() javascript?: string; // The Javascript to execute in the component.
     @Input() jsData?: Record<string, unknown>; // Data to pass to the fake component.
     @Input() cssCode?: string; // The styles to apply.
diff --git a/src/core/features/contentlinks/components/choose-site-modal/choose-site-modal.ts b/src/core/features/contentlinks/components/choose-site-modal/choose-site-modal.ts
index 15c4e29d1..fa546b317 100644
--- a/src/core/features/contentlinks/components/choose-site-modal/choose-site-modal.ts
+++ b/src/core/features/contentlinks/components/choose-site-modal/choose-site-modal.ts
@@ -36,7 +36,7 @@ import { CoreSharedModule } from '@/core/shared.module';
 })
 export class CoreContentLinksChooseSiteModalComponent implements OnInit {
 
-    @Input() url!: string;
+    @Input({ required: true }) url!: string;
 
     sites: CoreSiteBasicInfo[] = [];
     loaded = false;
diff --git a/src/core/features/course/classes/main-resource-component.ts b/src/core/features/course/classes/main-resource-component.ts
index e3b994b08..40a2e7cda 100644
--- a/src/core/features/course/classes/main-resource-component.ts
+++ b/src/core/features/course/classes/main-resource-component.ts
@@ -52,8 +52,8 @@ export type CoreCourseResourceDownloadResult = {
 })
 export class CoreCourseModuleMainResourceComponent implements OnInit, OnDestroy, CoreCourseModuleMainComponent {
 
-    @Input() module!: CoreCourseModuleData; // The module of the component.
-    @Input() courseId!: number; // Course ID the component belongs to.
+    @Input({ required: true }) module!: CoreCourseModuleData; // The module of the component.
+    @Input({ required: true }) courseId!: number; // Course ID the component belongs to.
     @Output() dataRetrieved = new EventEmitter<unknown>(); // Called to notify changes the index page from the main component.
 
     showLoading = true; // Whether to show loading.
diff --git a/src/core/features/course/components/course-format/course-format.ts b/src/core/features/course/components/course-format/course-format.ts
index 311864b22..c0edc183c 100644
--- a/src/core/features/course/components/course-format/course-format.ts
+++ b/src/core/features/course/components/course-format/course-format.ts
@@ -84,7 +84,7 @@ export class CoreCourseFormatComponent implements OnInit, OnChanges, OnDestroy {
 
     static readonly LOAD_MORE_ACTIVITIES = 10; // How many activities should load each time showMoreActivities is called.
 
-    @Input() course!: CoreCourseAnyCourseData; // The course to render.
+    @Input({ required: true }) course!: CoreCourseAnyCourseData; // The course to render.
     @Input() sections: CoreCourseSectionToDisplay[] = []; // List of course sections.
     @Input() initialSectionId?: number; // The section to load first (by ID).
     @Input() initialSectionNumber?: number; // The section to load first (by number).
diff --git a/src/core/features/course/components/module-info/module-info.ts b/src/core/features/course/components/module-info/module-info.ts
index 75999e0d8..c372b936b 100644
--- a/src/core/features/course/components/module-info/module-info.ts
+++ b/src/core/features/course/components/module-info/module-info.ts
@@ -35,11 +35,11 @@ import { CoreSites } from '@services/sites';
 })
 export class CoreCourseModuleInfoComponent implements OnInit {
 
-    @Input() module!: CoreCourseModuleData; // The module to render.
-    @Input() courseId!: number; // The courseId the module belongs to.
+    @Input({ required: true }) module!: CoreCourseModuleData; // The module to render.
+    @Input({ required: true }) courseId!: number; // The courseId the module belongs to.
 
-    @Input() component!: string; // Component for format text directive.
-    @Input() componentId!: string | number; // Component ID to use in conjunction with the component.
+    @Input({ required: true }) component!: string; // Component for format text directive.
+    @Input({ required: true }) componentId!: string | number; // Component ID to use in conjunction with the component.
 
     @Input() description?: string | false; // The description to display. If false, no description will be shown.
     @Input() expandDescription = false; // If the description should be expanded by default.
diff --git a/src/core/features/course/components/module-navigation/module-navigation.ts b/src/core/features/course/components/module-navigation/module-navigation.ts
index 33aca98d5..ce555d494 100644
--- a/src/core/features/course/components/module-navigation/module-navigation.ts
+++ b/src/core/features/course/components/module-navigation/module-navigation.ts
@@ -36,8 +36,8 @@ import { CoreEventObserver, CoreEvents } from '@singletons/events';
 })
 export class CoreCourseModuleNavigationComponent implements OnInit, OnDestroy {
 
-    @Input() courseId!: number; // Course ID.
-    @Input() currentModuleId!: number; // Current module Id.
+    @Input({ required: true }) courseId!: number; // Course ID.
+    @Input({ required: true }) currentModuleId!: number; // Current module Id.
 
     nextModule?: CoreCourseModuleData;
     previousModule?: CoreCourseModuleData;
diff --git a/src/core/features/course/components/module/module.ts b/src/core/features/course/components/module/module.ts
index f8c867751..d6aa7cee0 100644
--- a/src/core/features/course/components/module/module.ts
+++ b/src/core/features/course/components/module/module.ts
@@ -45,7 +45,7 @@ import { BehaviorSubject } from 'rxjs';
 })
 export class CoreCourseModuleComponent implements OnInit, OnDestroy {
 
-    @Input() module!: CoreCourseModuleData; // The module to render.
+    @Input({ required: true }) module!: CoreCourseModuleData; // The module to render.
     @Input() section?: CoreCourseSection; // The section the module belongs to.
     @Input() showActivityDates = false; // Whether to show activity dates.
     @Input() showCompletionConditions = false; // Whether to show activity completion conditions.
diff --git a/src/core/features/courses/components/course-list-item/course-list-item.ts b/src/core/features/courses/components/course-list-item/course-list-item.ts
index ebf2a8bdd..1fdc3d89c 100644
--- a/src/core/features/courses/components/course-list-item/course-list-item.ts
+++ b/src/core/features/courses/components/course-list-item/course-list-item.ts
@@ -43,7 +43,7 @@ import { CoreDownloadStatusTranslatable } from '@components/download-refresh/dow
 })
 export class CoreCoursesCourseListItemComponent implements OnInit, OnDestroy, OnChanges {
 
-    @Input() course!: CoreCourseListItem; // The course to render.
+    @Input({ required: true }) course!: CoreCourseListItem; // The course to render.
     @Input() showDownload = false; // If true, will show download button.
     @Input() layout: 'listwithenrol'|'summarycard'|'list'|'card' = 'listwithenrol';
 
diff --git a/src/core/features/courses/components/course-options-menu/course-options-menu.ts b/src/core/features/courses/components/course-options-menu/course-options-menu.ts
index b8bece69c..271c3e07f 100644
--- a/src/core/features/courses/components/course-options-menu/course-options-menu.ts
+++ b/src/core/features/courses/components/course-options-menu/course-options-menu.ts
@@ -27,8 +27,8 @@ import { PopoverController } from '@singletons';
 })
 export class CoreCoursesCourseOptionsMenuComponent implements OnInit {
 
-    @Input() course!: CoreEnrolledCourseDataWithExtraInfoAndOptions; // The course.
-    @Input() prefetch!: CorePrefetchStatusInfo; // The prefecth info.
+    @Input({ required: true }) course!: CoreEnrolledCourseDataWithExtraInfoAndOptions; // The course.
+    @Input({ required: true }) prefetch!: CorePrefetchStatusInfo; // The prefecth info.
 
     downloadCourseEnabled = false;
 
diff --git a/src/core/features/fileuploader/components/audio-histogram/audio-histogram.ts b/src/core/features/fileuploader/components/audio-histogram/audio-histogram.ts
index 7ced49f26..886b92ae6 100644
--- a/src/core/features/fileuploader/components/audio-histogram/audio-histogram.ts
+++ b/src/core/features/fileuploader/components/audio-histogram/audio-histogram.ts
@@ -31,7 +31,7 @@ export class CoreFileUploaderAudioHistogramComponent implements AfterViewInit, O
     private static readonly BARS_MIN_HEIGHT = 4;
     private static readonly BARS_GUTTER = 4;
 
-    @Input() analyser!: AnalyserNode;
+    @Input({ required: true }) analyser!: AnalyserNode;
     @Input() paused?: boolean;
     @ViewChild('canvas') canvasRef?: ElementRef<HTMLCanvasElement>;
 
diff --git a/src/core/features/login/components/exceeded-attempts/exceeded-attempts.ts b/src/core/features/login/components/exceeded-attempts/exceeded-attempts.ts
index 867dc4e45..57b4b8a30 100644
--- a/src/core/features/login/components/exceeded-attempts/exceeded-attempts.ts
+++ b/src/core/features/login/components/exceeded-attempts/exceeded-attempts.ts
@@ -23,7 +23,7 @@ import { CoreUserSupport } from '@features/user/services/support';
 })
 export class CoreLoginExceededAttemptsComponent implements OnInit {
 
-    @Input() supportConfig!: CoreUserSupportConfig;
+    @Input({ required: true }) supportConfig!: CoreUserSupportConfig;
     @Input() supportSubject?: string;
 
     canContactSupport = false;
diff --git a/src/core/features/rating/components/aggregate/aggregate.ts b/src/core/features/rating/components/aggregate/aggregate.ts
index 7837e6343..9687202ed 100644
--- a/src/core/features/rating/components/aggregate/aggregate.ts
+++ b/src/core/features/rating/components/aggregate/aggregate.ts
@@ -33,12 +33,12 @@ import { CoreEventObserver, CoreEvents } from '@singletons/events';
 })
 export class CoreRatingAggregateComponent implements OnChanges, OnDestroy {
 
-    @Input() ratingInfo!: CoreRatingInfo;
-    @Input() contextLevel!: ContextLevel;
-    @Input() instanceId!: number;
-    @Input() itemId!: number;
-    @Input() aggregateMethod!: number;
-    @Input() scaleId!: number;
+    @Input({ required: true }) ratingInfo!: CoreRatingInfo;
+    @Input({ required: true }) contextLevel!: ContextLevel;
+    @Input({ required: true }) instanceId!: number;
+    @Input({ required: true }) itemId!: number;
+    @Input({ required: true }) aggregateMethod!: number;
+    @Input({ required: true }) scaleId!: number;
     @Input() courseId?: number;
 
     item?: CoreRatingInfoItem;
diff --git a/src/core/features/rating/components/rate/rate.ts b/src/core/features/rating/components/rate/rate.ts
index a7b9c562e..5768ce812 100644
--- a/src/core/features/rating/components/rate/rate.ts
+++ b/src/core/features/rating/components/rate/rate.ts
@@ -37,15 +37,15 @@ import { CoreEventObserver, CoreEvents } from '@singletons/events';
 })
 export class CoreRatingRateComponent implements OnChanges, OnDestroy {
 
-    @Input() ratingInfo!: CoreRatingInfo;
-    @Input() contextLevel!: ContextLevel; // Context level: course, module, user, etc.
-    @Input() instanceId!: number; // Context instance id.
-    @Input() itemId!: number; // Item id. Example: forum post id.
-    @Input() itemSetId!: number; // Item set id. Example: forum discussion id.
-    @Input() courseId!: number;
-    @Input() aggregateMethod!: number;
-    @Input() scaleId!: number;
-    @Input() userId!: number;
+    @Input({ required: true }) ratingInfo!: CoreRatingInfo;
+    @Input({ required: true }) contextLevel!: ContextLevel; // Context level: course, module, user, etc.
+    @Input({ required: true }) instanceId!: number; // Context instance id.
+    @Input({ required: true }) itemId!: number; // Item id. Example: forum post id.
+    @Input({ required: true }) itemSetId!: number; // Item set id. Example: forum discussion id.
+    @Input({ required: true }) courseId!: number;
+    @Input({ required: true }) aggregateMethod!: number;
+    @Input({ required: true }) scaleId!: number;
+    @Input({ required: true }) userId!: number;
     @Output() protected onLoading: EventEmitter<boolean>; // Eevent that indicates whether the component is loading data.
     @Output() protected onUpdate: EventEmitter<void>; // Event emitted when the rating is updated online.
 
diff --git a/src/core/features/rating/components/ratings/ratings.ts b/src/core/features/rating/components/ratings/ratings.ts
index 5dc9aa6f8..005476c11 100644
--- a/src/core/features/rating/components/ratings/ratings.ts
+++ b/src/core/features/rating/components/ratings/ratings.ts
@@ -31,14 +31,14 @@ import { ModalController } from '@singletons';
 })
 export class CoreRatingRatingsComponent implements OnInit {
 
-    @Input() contextLevel!: ContextLevel;
-    @Input() instanceId!: number;
-    @Input() ratingComponent!: string;
-    @Input() ratingArea!: string;
-    @Input() aggregateMethod!: number;
-    @Input() itemId!: number;
-    @Input() scaleId!: number;
-    @Input() courseId!: number;
+    @Input({ required: true }) contextLevel!: ContextLevel;
+    @Input({ required: true }) instanceId!: number;
+    @Input({ required: true }) ratingComponent!: string;
+    @Input({ required: true }) ratingArea!: string;
+    @Input({ required: true }) aggregateMethod!: number;
+    @Input({ required: true }) itemId!: number;
+    @Input({ required: true }) scaleId!: number;
+    @Input({ required: true }) courseId!: number;
 
     loaded = false;
     ratings: CoreRatingItemRating[] = [];
diff --git a/src/core/features/reportbuilder/components/report-column/report-column.ts b/src/core/features/reportbuilder/components/report-column/report-column.ts
index 5d086c93a..a7c553023 100644
--- a/src/core/features/reportbuilder/components/report-column/report-column.ts
+++ b/src/core/features/reportbuilder/components/report-column/report-column.ts
@@ -25,12 +25,12 @@ export class CoreReportBuilderReportColumnComponent {
     @Input() isExpanded = false;
     @Input() isExpandable = false;
     @Input() showFirstTitle = false;
-    @Input() columnIndex!: number;
-    @Input() rowIndex!: number;
-    @Input() column!: string | number;
-    @Input() contextId!: number;
-    @Input() header!: string;
-    @Input() source!: string;
+    @Input({ required: true }) columnIndex!: number;
+    @Input({ required: true }) rowIndex!: number;
+    @Input({ required: true }) column!: string | number;
+    @Input({ required: true }) contextId!: number;
+    @Input({ required: true }) header!: string;
+    @Input({ required: true }) source!: string;
     @Output() onToggleRow: EventEmitter<number> = new EventEmitter();
 
     isString = (value: unknown): boolean => CoreReportBuilder.isString(value);
diff --git a/src/core/features/reportbuilder/components/report-detail/report-detail.ts b/src/core/features/reportbuilder/components/report-detail/report-detail.ts
index 5be288272..5776d71ff 100644
--- a/src/core/features/reportbuilder/components/report-detail/report-detail.ts
+++ b/src/core/features/reportbuilder/components/report-detail/report-detail.ts
@@ -40,7 +40,7 @@ import { map } from 'rxjs/operators';
 })
 export class CoreReportBuilderReportDetailComponent implements OnInit {
 
-    @Input() reportId!: string;
+    @Input({ required: true }) reportId!: string;
     @Input() isBlock = true;
     @Input() perPage?: number;
     @Input() layout: 'card' | 'table' | 'adaptative' = 'adaptative';
diff --git a/src/core/features/reportbuilder/components/report-summary/report-summary.ts b/src/core/features/reportbuilder/components/report-summary/report-summary.ts
index 13b3650c5..7db580ef8 100644
--- a/src/core/features/reportbuilder/components/report-summary/report-summary.ts
+++ b/src/core/features/reportbuilder/components/report-summary/report-summary.ts
@@ -31,7 +31,7 @@ import { ModalController } from '@singletons';
 })
 export class CoreReportBuilderReportSummaryComponent implements OnInit {
 
-    @Input() reportDetail!: CoreReportBuilderReportDetail;
+    @Input({ required: true }) reportDetail!: CoreReportBuilderReportDetail;
     reportUrl!: string;
     reportDetailToDisplay!: { title: string; text: string }[];
 
diff --git a/src/core/features/search/components/global-search-result/global-search-result.ts b/src/core/features/search/components/global-search-result/global-search-result.ts
index 7e60f15e6..ae02fedfb 100644
--- a/src/core/features/search/components/global-search-result/global-search-result.ts
+++ b/src/core/features/search/components/global-search-result/global-search-result.ts
@@ -22,7 +22,7 @@ import { CoreSearchGlobalSearchResult, CoreSearchGlobalSearchResultContext } fro
 })
 export class CoreSearchGlobalSearchResultComponent implements OnChanges {
 
-    @Input() result!: CoreSearchGlobalSearchResult;
+    @Input({ required: true }) result!: CoreSearchGlobalSearchResult;
     @Input() showCourse?: boolean;
 
     renderedContext: CoreSearchGlobalSearchResultContext | null = null;
diff --git a/src/core/features/siteplugins/classes/call-ws-directive.ts b/src/core/features/siteplugins/classes/call-ws-directive.ts
index f17b7d8a4..ead49d373 100644
--- a/src/core/features/siteplugins/classes/call-ws-directive.ts
+++ b/src/core/features/siteplugins/classes/call-ws-directive.ts
@@ -27,7 +27,7 @@ import { CoreFormFields, CoreForms } from '@singletons/form';
 @Directive()
 export class CoreSitePluginsCallWSBaseDirective implements OnInit, OnDestroy {
 
-    @Input() name!: string; // The name of the WS to call.
+    @Input({ required: true }) name!: string; // The name of the WS to call.
     @Input() params?: Record<string, unknown>; // The params for the WS call.
     @Input() preSets?: CoreSiteWSPreSets; // The preSets for the WS call.
     @Input() useOtherDataForWS?: string[] | unknown; // Whether to include other data in the params for the WS.
diff --git a/src/core/features/siteplugins/components/assign-feedback/assign-feedback.ts b/src/core/features/siteplugins/components/assign-feedback/assign-feedback.ts
index 213f4361a..ce1b2e54d 100644
--- a/src/core/features/siteplugins/components/assign-feedback/assign-feedback.ts
+++ b/src/core/features/siteplugins/components/assign-feedback/assign-feedback.ts
@@ -28,10 +28,10 @@ import { CoreSitePluginsCompileInitComponent } from '@features/siteplugins/class
 })
 export class CoreSitePluginsAssignFeedbackComponent extends CoreSitePluginsCompileInitComponent implements OnInit {
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
-    @Input() userId!: number; // The user ID of the submission.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) userId!: number; // The user ID of the submission.
     @Input() configs?: Record<string,string>; // The configs for the plugin.
     @Input() canEdit = false; // Whether the user can edit.
     @Input() edit = false; // Whether the user is editing.
diff --git a/src/core/features/siteplugins/components/assign-submission/assign-submission.ts b/src/core/features/siteplugins/components/assign-submission/assign-submission.ts
index ed7232587..a00da2054 100644
--- a/src/core/features/siteplugins/components/assign-submission/assign-submission.ts
+++ b/src/core/features/siteplugins/components/assign-submission/assign-submission.ts
@@ -28,9 +28,9 @@ import { CoreSitePluginsCompileInitComponent } from '@features/siteplugins/class
 })
 export class CoreSitePluginsAssignSubmissionComponent extends CoreSitePluginsCompileInitComponent implements OnInit {
 
-    @Input() assign!: AddonModAssignAssign; // The assignment.
-    @Input() submission!: AddonModAssignSubmission; // The submission.
-    @Input() plugin!: AddonModAssignPlugin; // The plugin object.
+    @Input({ required: true }) assign!: AddonModAssignAssign; // The assignment.
+    @Input({ required: true }) submission!: AddonModAssignSubmission; // The submission.
+    @Input({ required: true }) plugin!: AddonModAssignPlugin; // The plugin object.
     @Input() configs?: Record<string, string>; // The configs for the plugin.
     @Input() edit = false; // Whether the user is editing.
     @Input() allowOffline = false; // Whether to allow offline.
diff --git a/src/core/features/siteplugins/components/module-index/module-index.ts b/src/core/features/siteplugins/components/module-index/module-index.ts
index 6d6291235..49f51aca9 100644
--- a/src/core/features/siteplugins/components/module-index/module-index.ts
+++ b/src/core/features/siteplugins/components/module-index/module-index.ts
@@ -41,8 +41,8 @@ import { CoreSitePluginsPluginContentComponent, CoreSitePluginsPluginContentLoad
 })
 export class CoreSitePluginsModuleIndexComponent implements OnInit, OnDestroy, CoreCourseModuleMainComponent {
 
-    @Input() module!: CoreCourseModuleData; // The module.
-    @Input() courseId!: number; // Course ID the module belongs to.
+    @Input({ required: true }) module!: CoreCourseModuleData; // The module.
+    @Input({ required: true }) courseId!: number; // Course ID the module belongs to.
     @Input() pageTitle?: string; // Current page title. It can be used by the "new-content" directives.
 
     @ViewChild(CoreSitePluginsPluginContentComponent) content?: CoreSitePluginsPluginContentComponent;
diff --git a/src/core/features/siteplugins/components/plugin-content/plugin-content.ts b/src/core/features/siteplugins/components/plugin-content/plugin-content.ts
index 49634c4a9..6a501b8d8 100644
--- a/src/core/features/siteplugins/components/plugin-content/plugin-content.ts
+++ b/src/core/features/siteplugins/components/plugin-content/plugin-content.ts
@@ -50,7 +50,7 @@ export class CoreSitePluginsPluginContentComponent implements OnInit, DoCheck {
     @ViewChild('compile') compileComponent?: CoreCompileHtmlComponent;
 
     @HostBinding('class') @Input() component = '';
-    @Input() method!: string;
+    @Input({ required: true }) method!: string;
     @Input() args?: Record<string, unknown>;
     @Input() initResult?: CoreSitePluginsContent | null; // Result of the init WS call of the handler.
     @Input() data: Record<string, unknown> = {}; // Data to pass to the component.
diff --git a/src/core/features/siteplugins/components/workshop-assessment-strategy/workshop-assessment-strategy.ts b/src/core/features/siteplugins/components/workshop-assessment-strategy/workshop-assessment-strategy.ts
index 2030ab474..7b89221ff 100644
--- a/src/core/features/siteplugins/components/workshop-assessment-strategy/workshop-assessment-strategy.ts
+++ b/src/core/features/siteplugins/components/workshop-assessment-strategy/workshop-assessment-strategy.ts
@@ -28,13 +28,13 @@ import { CoreSitePluginsCompileInitComponent } from '@features/siteplugins/class
 })
 export class CoreSitePluginsWorkshopAssessmentStrategyComponent extends CoreSitePluginsCompileInitComponent implements OnInit {
 
-    @Input() workshopId!: number;
-    @Input() assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
-    @Input() edit!: boolean;
-    @Input() selectedValues!: AddonModWorkshopGetAssessmentFormFieldsParsedData[];
-    @Input() fieldErrors!: Record<string, string>;
-    @Input() strategy!: string;
-    @Input() moduleId!: number;
+    @Input({ required: true }) workshopId!: number;
+    @Input({ required: true }) assessment!: AddonModWorkshopSubmissionAssessmentWithFormData;
+    @Input({ required: true }) edit!: boolean;
+    @Input({ required: true }) selectedValues!: AddonModWorkshopGetAssessmentFormFieldsParsedData[];
+    @Input({ required: true }) fieldErrors!: Record<string, string>;
+    @Input({ required: true }) strategy!: string;
+    @Input({ required: true }) moduleId!: number;
     @Input() courseId?: number;
 
     /**
diff --git a/src/core/features/usertours/components/user-tour/user-tour.ts b/src/core/features/usertours/components/user-tour/user-tour.ts
index 2f278d8fc..0d0aacce6 100644
--- a/src/core/features/usertours/components/user-tour/user-tour.ts
+++ b/src/core/features/usertours/components/user-tour/user-tour.ts
@@ -52,9 +52,9 @@ const BACKDROP_DISMISS_SAFETY_TRESHOLD = 1000;
 })
 export class CoreUserToursUserTourComponent implements AfterViewInit, OnDestroy {
 
-    @Input() container!: HTMLElement;
-    @Input() id!: string;
-    @Input() component!: unknown;
+    @Input({ required: true }) container!: HTMLElement;
+    @Input({ required: true }) id!: string;
+    @Input({ required: true }) component!: unknown;
     @Input() componentProps?: Record<string, unknown>;
     @Input() focus?: HTMLElement;
     @Input() side?: CoreUserToursSide;