diff --git a/src/main/resources/assets/admin/common/js/BrowserHelper.ts b/src/main/resources/assets/admin/common/js/BrowserHelper.ts
index 873a256f0..d6137ba7f 100644
--- a/src/main/resources/assets/admin/common/js/BrowserHelper.ts
+++ b/src/main/resources/assets/admin/common/js/BrowserHelper.ts
@@ -64,7 +64,7 @@ export class BrowserHelper {
 
     static isSafari(): boolean {
         return navigator.vendor && navigator.vendor.indexOf('Apple') > -1 &&
-               navigator.userAgent && !navigator.userAgent.match('CriOS');
+               navigator.userAgent && !(/CriOS/.exec(navigator.userAgent));
     }
 
     static isAndroid(): boolean {
@@ -76,7 +76,7 @@ export class BrowserHelper {
     }
 
     private static init() {
-        let M = navigator.userAgent.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
+        let M = (/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i.exec(navigator.userAgent)) || [];
         BrowserHelper.BROWSER_NAME = (<any>BrowserName)[M[1].toLocaleUpperCase()];
         BrowserHelper.BROWSER_VERSION = M[2];
 
diff --git a/src/main/resources/assets/admin/common/js/ClassHelper.ts b/src/main/resources/assets/admin/common/js/ClassHelper.ts
index 70a42c6e5..e293b6b9a 100644
--- a/src/main/resources/assets/admin/common/js/ClassHelper.ts
+++ b/src/main/resources/assets/admin/common/js/ClassHelper.ts
@@ -81,7 +81,7 @@ export class ClassHelper {
 
     static findPath(obj: Object, constructor: Function, nestLevel: number = 1): string {
         let value;
-        let path;
+        let path: string;
 
         // don't search in current package if nest level is to big
         if (nestLevel > ClassHelper.MAX_NEST_LEVEL) {
diff --git a/src/main/resources/assets/admin/common/js/ObjectHelper.ts b/src/main/resources/assets/admin/common/js/ObjectHelper.ts
index cf1738bf3..9927b6d4b 100644
--- a/src/main/resources/assets/admin/common/js/ObjectHelper.ts
+++ b/src/main/resources/assets/admin/common/js/ObjectHelper.ts
@@ -11,6 +11,7 @@ export class ObjectHelper {
      * @returns {Object}
      */
     static create(constructor: Function, ..._args: any[]) {
+        // eslint-disable-next-line prefer-spread, prefer-rest-params
         let factory = constructor.bind.apply(constructor, arguments);
         return new factory();
     }
diff --git a/src/main/resources/assets/admin/common/js/aggregation/BucketFactory.ts b/src/main/resources/assets/admin/common/js/aggregation/BucketFactory.ts
index a1b9061c3..ff3f8386f 100644
--- a/src/main/resources/assets/admin/common/js/aggregation/BucketFactory.ts
+++ b/src/main/resources/assets/admin/common/js/aggregation/BucketFactory.ts
@@ -1,7 +1,5 @@
 import {BucketWrapperJson} from './BucketWrapperJson';
 import {Bucket} from './Bucket';
-import {DateRangeBucketJson} from './DateRangeBucketJson';
-import {BucketJson} from './BucketJson';
 import {DateRangeBucket} from './DateRangeBucket';
 
 export class BucketFactory {
@@ -9,9 +7,9 @@ export class BucketFactory {
     public static createFromJson(json: BucketWrapperJson): Bucket {
 
         if (json.DateRangeBucket) {
-            return DateRangeBucket.fromDateRangeJson(<DateRangeBucketJson>json.DateRangeBucket);
+            return DateRangeBucket.fromDateRangeJson(json.DateRangeBucket);
         } else if (json.BucketJson) {
-            return Bucket.fromJson(<BucketJson>json.BucketJson);
+            return Bucket.fromJson(json.BucketJson);
         } else {
             throw new Error('Bucket-type not recognized: ' + json);
         }
diff --git a/src/main/resources/assets/admin/common/js/app/browse/filter/BrowseFilterPanel.ts b/src/main/resources/assets/admin/common/js/app/browse/filter/BrowseFilterPanel.ts
index e3a961382..e1b132f42 100644
--- a/src/main/resources/assets/admin/common/js/app/browse/filter/BrowseFilterPanel.ts
+++ b/src/main/resources/assets/admin/common/js/app/browse/filter/BrowseFilterPanel.ts
@@ -52,7 +52,7 @@ export class BrowseFilterPanel<T>
         });
 
         this.clearFilter = new ClearFilterButton();
-        this.clearFilter.onClicked(() => this.reset());
+        this.clearFilter.onClicked(() => void this.reset());
 
         this.hitsCounterEl = new SpanEl('hits-counter');
 
diff --git a/src/main/resources/assets/admin/common/js/app/wizard/WizardHeaderWithDisplayNameAndName.ts b/src/main/resources/assets/admin/common/js/app/wizard/WizardHeaderWithDisplayNameAndName.ts
index 5f5fa48e0..ca6b4a08b 100644
--- a/src/main/resources/assets/admin/common/js/app/wizard/WizardHeaderWithDisplayNameAndName.ts
+++ b/src/main/resources/assets/admin/common/js/app/wizard/WizardHeaderWithDisplayNameAndName.ts
@@ -7,7 +7,6 @@ import {AutosizeTextInput} from '../../ui/text/AutosizeTextInput';
 import {ValueChangedEvent} from '../../ValueChangedEvent';
 import {StringHelper} from '../../util/StringHelper';
 import {NamePrettyfier} from '../../NamePrettyfier';
-import {DisplayNameGenerator} from './DisplayNameGenerator';
 import {WizardHeader} from './WizardHeader';
 import {Name} from '../../Name';
 import {DivEl} from '../../dom/DivEl';
@@ -232,7 +231,7 @@ export class WizardHeaderWithDisplayNameAndName
     /* TODO: DEPRECATE METHODS BELOW IN 4.0 */
 
     disableNameInput() {
-        console.warn(`WizardHeaderWithDisplayNameAndName.disableNameInput() is deprecated and will be removed in lib-admin-ui 4.0.0`);
+        console.warn('WizardHeaderWithDisplayNameAndName.disableNameInput() is deprecated and will be removed in lib-admin-ui 4.0.0');
         this.toggleNameInput(false);
     }
 
diff --git a/src/main/resources/assets/admin/common/js/application/ApplicationKey.ts b/src/main/resources/assets/admin/common/js/application/ApplicationKey.ts
index 6708cd56f..ac09859a7 100644
--- a/src/main/resources/assets/admin/common/js/application/ApplicationKey.ts
+++ b/src/main/resources/assets/admin/common/js/application/ApplicationKey.ts
@@ -48,12 +48,7 @@ export class ApplicationKey
     }
 
     isSystemReserved(): boolean {
-        for (let key in ApplicationKey.SYSTEM_RESERVED_APPLICATION_KEYS) {
-            if (ApplicationKey.SYSTEM_RESERVED_APPLICATION_KEYS[key].equals(this)) {
-                return true;
-            }
-        }
-        return false;
+        return ApplicationKey.SYSTEM_RESERVED_APPLICATION_KEYS.some(key => key.equals(this));
     }
 
     toString(): string {
diff --git a/src/main/resources/assets/admin/common/js/application/ApplicationLoader.ts b/src/main/resources/assets/admin/common/js/application/ApplicationLoader.ts
index 3322950d9..1d768d5c8 100644
--- a/src/main/resources/assets/admin/common/js/application/ApplicationLoader.ts
+++ b/src/main/resources/assets/admin/common/js/application/ApplicationLoader.ts
@@ -29,15 +29,14 @@ export class ApplicationLoader
     }
 
     load(): Q.Promise<Application[]> {
-        let me = this;
-        me.notifyLoadingData();
+        this.notifyLoadingData();
 
-        return me.sendRequest()
+        return this.sendRequest()
             .then((applications: Application[]) => {
-                if (me.filterObject) {
-                    applications = applications.filter(me.filterResults, me);
+                if (this.filterObject) {
+                    applications = applications.filter(this.filterResults, this);
                 }
-                me.notifyLoadedData(applications);
+                this.notifyLoadedData(applications);
 
                 return applications;
             });
diff --git a/src/main/resources/assets/admin/common/js/data/PropertyArray.ts b/src/main/resources/assets/admin/common/js/data/PropertyArray.ts
index 5d8a43274..1f5ecbd46 100644
--- a/src/main/resources/assets/admin/common/js/data/PropertyArray.ts
+++ b/src/main/resources/assets/admin/common/js/data/PropertyArray.ts
@@ -441,7 +441,8 @@ export class PropertyArray
 
     private checkType(type: ValueType) {
         if (!this.type.equals(type)) {
-            throw new Error(`This PropertyArray expects only properties with value of type '${this.type}', got: ${type}`);
+            const msg = `This PropertyArray expects only properties with value of type '${this.type.toString()}', got: ${type.toString()}`;
+            throw new Error(msg);
         }
     }
 
diff --git a/src/main/resources/assets/admin/common/js/data/PropertyTree.ts b/src/main/resources/assets/admin/common/js/data/PropertyTree.ts
index 046910016..098772cb5 100644
--- a/src/main/resources/assets/admin/common/js/data/PropertyTree.ts
+++ b/src/main/resources/assets/admin/common/js/data/PropertyTree.ts
@@ -101,7 +101,7 @@ export class PropertyTree
     }
 
     /**
-     * @returns {PropertySet} Returns the root [[PropertySet]] of this tree.
+     * @returns {PropertySet} Returns the root [[PropertySet]] of this tree.
      */
     public getRoot(): PropertySet {
         return this.root;
diff --git a/src/main/resources/assets/admin/common/js/dom/Element.ts b/src/main/resources/assets/admin/common/js/dom/Element.ts
index af660f0fa..47c012620 100644
--- a/src/main/resources/assets/admin/common/js/dom/Element.ts
+++ b/src/main/resources/assets/admin/common/js/dom/Element.ts
@@ -247,7 +247,7 @@ export class Element {
 
     static fromSelector(s: string, loadExistingChildren: boolean = true): Element[] {
         return $(s).map((_index, elem) => {
-            let htmlEl = <HTMLElement>elem;
+            let htmlEl = elem;
             let parentEl;
             if (htmlEl && htmlEl.parentElement) {
                 parentEl = Element.fromHtmlElement(htmlEl.parentElement);
@@ -1302,6 +1302,7 @@ export class Element {
     }
 
     private getFirstNonEmptyAncestor(): Element {
+        // eslint-disable-next-line @typescript-eslint/no-this-alias
         let el: Element = this;
 
         while (!!el && el.isEmptyElement()) {
diff --git a/src/main/resources/assets/admin/common/js/dom/ElementHelper.ts b/src/main/resources/assets/admin/common/js/dom/ElementHelper.ts
index d1e5acbba..9a6db1f42 100644
--- a/src/main/resources/assets/admin/common/js/dom/ElementHelper.ts
+++ b/src/main/resources/assets/admin/common/js/dom/ElementHelper.ts
@@ -70,7 +70,7 @@ export class ElementHelper {
 
     getParent(): ElementHelper {
         let parent = this.el.parentElement;
-        return parent ? new ElementHelper(<HTMLElement>parent) : null;
+        return parent ? new ElementHelper(parent) : null;
     }
 
     setDisabled(value: boolean): ElementHelper {
diff --git a/src/main/resources/assets/admin/common/js/dom/ImgElHelper.ts b/src/main/resources/assets/admin/common/js/dom/ImgElHelper.ts
index 3612b7e99..56cc31180 100644
--- a/src/main/resources/assets/admin/common/js/dom/ImgElHelper.ts
+++ b/src/main/resources/assets/admin/common/js/dom/ImgElHelper.ts
@@ -11,7 +11,7 @@ export class ImgHelper
     }
 
     static create(): ElementHelper {
-        return new ImgHelper(<HTMLImageElement>document.createElement('img'));
+        return new ImgHelper(document.createElement('img'));
     }
 
     getHTMLElement(): HTMLImageElement {
diff --git a/src/main/resources/assets/admin/common/js/event/EventBus.ts b/src/main/resources/assets/admin/common/js/event/EventBus.ts
index 2aed75019..f66e500aa 100644
--- a/src/main/resources/assets/admin/common/js/event/EventBus.ts
+++ b/src/main/resources/assets/admin/common/js/event/EventBus.ts
@@ -45,7 +45,7 @@ export class EventBus {
 
     static polyfillCustomEvent(contextWindow: Window) {
         const customEventFn = (event: string, params: any) => {
-            params = params || { bubbles: false, cancelable: false, detail: undefined };
+            params = params || {bubbles: false, cancelable: false, detail: undefined};
             const evt = document.createEvent('CustomEvent');
             evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
             return evt;
diff --git a/src/main/resources/assets/admin/common/js/form/FormItemOccurrences.ts b/src/main/resources/assets/admin/common/js/form/FormItemOccurrences.ts
index 4bd197fcc..356a080b8 100644
--- a/src/main/resources/assets/admin/common/js/form/FormItemOccurrences.ts
+++ b/src/main/resources/assets/admin/common/js/form/FormItemOccurrences.ts
@@ -396,7 +396,7 @@ export class FormItemOccurrences<V extends FormItemOccurrenceView> {
         const promises: Q.Promise<any>[] = [];
         const totalItemsNeeded: number = this.getTotalOccurrencesNeeded();
 
-        const extraItemsToRemove: V[] = this.occurrenceViews.filter((item: V, index: number) => index >= totalItemsNeeded );
+        const extraItemsToRemove: V[] = this.occurrenceViews.filter((item: V, index: number) => index >= totalItemsNeeded);
         extraItemsToRemove.forEach((item: V) => this.removeOccurrenceView(item));
 
         this.occurrenceViews.forEach((view: V) => {
diff --git a/src/main/resources/assets/admin/common/js/form/inputtype/appconfig/ApplicationConfiguratorDialog.ts b/src/main/resources/assets/admin/common/js/form/inputtype/appconfig/ApplicationConfiguratorDialog.ts
index 1b4c0954b..aba70f714 100644
--- a/src/main/resources/assets/admin/common/js/form/inputtype/appconfig/ApplicationConfiguratorDialog.ts
+++ b/src/main/resources/assets/admin/common/js/form/inputtype/appconfig/ApplicationConfiguratorDialog.ts
@@ -177,7 +177,7 @@ export class ApplicationConfiguratorDialog
 
     private findComboboxes(element: Element): ComboBox<any>[] {
         if (element instanceof ComboBox) {
-            return [<ComboBox<any>>element];
+            return [element];
         }
 
         return ArrayHelper.flatten(element.getChildren().map(child => this.findComboboxes(child)));
diff --git a/src/main/resources/assets/admin/common/js/form/inputtype/support/BaseInputTypeNotManagingAdd.ts b/src/main/resources/assets/admin/common/js/form/inputtype/support/BaseInputTypeNotManagingAdd.ts
index db764af73..8669d146c 100644
--- a/src/main/resources/assets/admin/common/js/form/inputtype/support/BaseInputTypeNotManagingAdd.ts
+++ b/src/main/resources/assets/admin/common/js/form/inputtype/support/BaseInputTypeNotManagingAdd.ts
@@ -54,7 +54,7 @@ export abstract class BaseInputTypeNotManagingAdd
 
     handleDnDStart(ui: JQueryUI.SortableUIParams): void {
 
-        let draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+        let draggedElement = Element.fromHtmlElement(ui.item[0]);
         this.draggingIndex = draggedElement.getSiblingIndex();
 
         ui.placeholder.text('Drop form item set here');
@@ -67,7 +67,7 @@ export abstract class BaseInputTypeNotManagingAdd
     handleDnDUpdate(ui: JQueryUI.SortableUIParams) {
 
         if (this.draggingIndex >= 0) {
-            let draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+            let draggedElement = Element.fromHtmlElement(ui.item[0]);
             let draggedToIndex = draggedElement.getSiblingIndex();
             this.inputOccurrences.moveOccurrence(this.draggingIndex, draggedToIndex);
         }
diff --git a/src/main/resources/assets/admin/common/js/form/set/FormSetView.ts b/src/main/resources/assets/admin/common/js/form/set/FormSetView.ts
index 5ca683a5e..581080916 100644
--- a/src/main/resources/assets/admin/common/js/form/set/FormSetView.ts
+++ b/src/main/resources/assets/admin/common/js/form/set/FormSetView.ts
@@ -194,7 +194,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
     validate(silent: boolean = true, viewToSkipValidation: FormItemOccurrenceView = null): ValidationRecording {
 
         if (!this.formItemOccurrences) {
-            throw new Error(`Can't validate before layout is done`);
+            throw new Error('Can\'t validate before layout is done');
         }
 
         const validationRecordingPath = this.resolveValidationRecordingPath();
@@ -429,7 +429,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
     }
 
     protected handleDnDStart(ui: JQueryUI.SortableUIParams): void {
-        const draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+        const draggedElement = Element.fromHtmlElement(ui.item[0]);
         assert(draggedElement.hasClass(this.classPrefix + '-occurrence-view'));
         this.draggingIndex = draggedElement.getSiblingIndex();
 
@@ -439,7 +439,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
 
     protected handleDnDUpdate(ui: JQueryUI.SortableUIParams) {
         if (this.draggingIndex >= 0) {
-            const draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+            const draggedElement = Element.fromHtmlElement(ui.item[0]);
             assert(draggedElement.hasClass(this.classPrefix + '-occurrence-view'));
             const draggedToIndex = draggedElement.getSiblingIndex();
 
@@ -458,7 +458,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
             return; // everything is already have been handled in update
         }
 
-        const draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+        const draggedElement = Element.fromHtmlElement(ui.item[0]);
         assert(draggedElement.hasClass(this.classPrefix + '-occurrence-view'));
         const draggedToIndex = draggedElement.getSiblingIndex();
         this.formItemOccurrences.refreshOccurence(draggedToIndex);
@@ -537,7 +537,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
         const views = this.formItemOccurrences.getOccurrenceViews();
         const occurrenceCount = views.length;
         const anyExpandable = occurrenceCount > 0 && views.some(view => view.isExpandable());
-        const isCollapsed = (<FormSetOccurrences<V>>this.formItemOccurrences).isCollapsed();
+        const isCollapsed = (this.formItemOccurrences).isCollapsed();
 
         const caption = occurrenceCount > 1 ?
                         (isCollapsed ? i18n('button.expandall') : i18n('button.collapseall')) :
@@ -549,7 +549,7 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
     private makeCollapseButton(): AEl {
         const collapseButton = new AEl('collapse-button');
         collapseButton.onClicked((event: MouseEvent) => {
-            const isCollapsed = (<FormSetOccurrences<V>>this.formItemOccurrences).isCollapsed();
+            const isCollapsed = (this.formItemOccurrences).isCollapsed();
             this.toggleOccurrencesVisibility(isCollapsed);
             return false;
         });
@@ -585,9 +585,9 @@ export abstract class FormSetView<V extends FormSetOccurrenceView>
         item.setContainerVisible(true);
         const processFormItemView = (formItemView: FormItemView) => {
             if (formItemView instanceof FormSetView) {
-                (<FormSetView<any>>formItemView).expandRecursively();
+                (formItemView).expandRecursively();
             } else if (formItemView instanceof FormOptionSetOptionView) {
-                (<FormOptionSetOptionView>formItemView).getFormItemViews().forEach(processFormItemView);
+                (formItemView).getFormItemViews().forEach(processFormItemView);
             }
         };
         item.getFormItemViews().forEach(processFormItemView);
diff --git a/src/main/resources/assets/admin/common/js/form/set/optionset/FormOptionSetOccurrenceView.ts b/src/main/resources/assets/admin/common/js/form/set/optionset/FormOptionSetOccurrenceView.ts
index 94839d7f8..6511d515f 100644
--- a/src/main/resources/assets/admin/common/js/form/set/optionset/FormOptionSetOccurrenceView.ts
+++ b/src/main/resources/assets/admin/common/js/form/set/optionset/FormOptionSetOccurrenceView.ts
@@ -55,7 +55,7 @@ export abstract class FormOptionSetOccurrenceView
         super.subscribeOnItemEvents();
 
         this.formItemViews.forEach((formItemView: FormOptionSetOptionView) => {
-            formItemView.onSelectionChanged(() => this.handleSelectionChanged(<FormOptionSetOptionView>formItemView));
+            formItemView.onSelectionChanged(() => this.handleSelectionChanged(formItemView));
         });
     }
 
diff --git a/src/main/resources/assets/admin/common/js/query/FulltextSearchExpression.ts b/src/main/resources/assets/admin/common/js/query/FulltextSearchExpression.ts
index 26e874d06..539c9ded1 100644
--- a/src/main/resources/assets/admin/common/js/query/FulltextSearchExpression.ts
+++ b/src/main/resources/assets/admin/common/js/query/FulltextSearchExpression.ts
@@ -31,7 +31,7 @@ export class FulltextSearchExpression {
     }
 
     static escapeString(value: string): string {
-        return value.replace(/((\&\&)|(\|\|)|[+-=><!(){}\[\]^"~*?:\\/])/g, `\\$1`);
+        return value.replace(/((\&\&)|(\|\|)|[+-=><!(){}\[\]^"~*?:\\/])/g, '\\$1');
     }
 }
 
diff --git a/src/main/resources/assets/admin/common/js/query/expr/ConstraintExpr.ts b/src/main/resources/assets/admin/common/js/query/expr/ConstraintExpr.ts
index f625b4b40..ebec97b03 100644
--- a/src/main/resources/assets/admin/common/js/query/expr/ConstraintExpr.ts
+++ b/src/main/resources/assets/admin/common/js/query/expr/ConstraintExpr.ts
@@ -1,5 +1,3 @@
 import {Expression} from './Expression';
 
-export interface ConstraintExpr
-    extends Expression {
-}
+export type ConstraintExpr = Expression;
diff --git a/src/main/resources/assets/admin/common/js/query/expr/ValueExpr.ts b/src/main/resources/assets/admin/common/js/query/expr/ValueExpr.ts
index 25b7495f9..82ab2f226 100644
--- a/src/main/resources/assets/admin/common/js/query/expr/ValueExpr.ts
+++ b/src/main/resources/assets/admin/common/js/query/expr/ValueExpr.ts
@@ -59,7 +59,7 @@ export class ValueExpr
     }
 
     private quoteString(value: string): string {
-        if (value.indexOf(`'`) > -1) {
+        if (value.indexOf('\'') > -1) {
             return `"${value}"`;
         } else {
             return `'${value}'`;
diff --git a/src/main/resources/assets/admin/common/js/schema/content/ContentTypeName.ts b/src/main/resources/assets/admin/common/js/schema/content/ContentTypeName.ts
index 9f9394326..e5a4b3ed1 100644
--- a/src/main/resources/assets/admin/common/js/schema/content/ContentTypeName.ts
+++ b/src/main/resources/assets/admin/common/js/schema/content/ContentTypeName.ts
@@ -51,7 +51,7 @@ export class ContentTypeName
     static IMAGE: ContentTypeName = ContentTypeName.from(ApplicationKey.MEDIA, 'image');
 
     constructor(name: string) {
-        assertNotNull(name, `Content type name can't be null`);
+        assertNotNull(name, 'Content type name can\'t be null');
         let parts = name.split(ApplicationBasedName.SEPARATOR);
         super(ApplicationKey.fromString(parts[0]), parts[1]);
     }
diff --git a/src/main/resources/assets/admin/common/js/schema/mixin/MixinName.ts b/src/main/resources/assets/admin/common/js/schema/mixin/MixinName.ts
index 93b49d285..c6ef70220 100644
--- a/src/main/resources/assets/admin/common/js/schema/mixin/MixinName.ts
+++ b/src/main/resources/assets/admin/common/js/schema/mixin/MixinName.ts
@@ -8,7 +8,7 @@ export class MixinName
     extends ApplicationBasedName {
 
     constructor(name: string) {
-        assertNotNull(name, `Mixin name can't be null`);
+        assertNotNull(name, 'Mixin name can\'t be null');
         let parts = name.split(ApplicationBasedName.SEPARATOR);
         super(ApplicationKey.fromString(parts[0]), parts[1]);
     }
diff --git a/src/main/resources/assets/admin/common/js/security/auth/IsAuthenticatedRequest.ts b/src/main/resources/assets/admin/common/js/security/auth/IsAuthenticatedRequest.ts
index bf9e01237..dc69b67e6 100644
--- a/src/main/resources/assets/admin/common/js/security/auth/IsAuthenticatedRequest.ts
+++ b/src/main/resources/assets/admin/common/js/security/auth/IsAuthenticatedRequest.ts
@@ -19,6 +19,7 @@ export class IsAuthenticatedRequest
     }
 
     sendAndParse(): Q.Promise<LoginResult> {
+        // eslint-disable-next-line @typescript-eslint/no-misused-promises
         IsAuthenticatedRequest.cachedRequestPromise = IsAuthenticatedRequest.cachedRequestPromise || super.sendAndParse();
         return IsAuthenticatedRequest.cachedRequestPromise;
     }
diff --git a/src/main/resources/assets/admin/common/js/ui/dialog/ProgressBarManager.ts b/src/main/resources/assets/admin/common/js/ui/dialog/ProgressBarManager.ts
index 71bde71cb..e7f4e59dc 100644
--- a/src/main/resources/assets/admin/common/js/ui/dialog/ProgressBarManager.ts
+++ b/src/main/resources/assets/admin/common/js/ui/dialog/ProgressBarManager.ts
@@ -57,7 +57,7 @@ export class ProgressBarManager {
         this.managingElement = config.managingElement;
         this.processHandler = config.processHandler;
         this.processingLabel = config.processingLabel;
-        this.unlockControlsHandler = config.unlockControlsHandler || (() => {/*empty*/
+        this.unlockControlsHandler = config.unlockControlsHandler || (() => { /*empty*/
         });
         this.createProcessingMessage = config.createProcessingMessage;
 
diff --git a/src/main/resources/assets/admin/common/js/ui/form/FormItem.ts b/src/main/resources/assets/admin/common/js/ui/form/FormItem.ts
index ec100c20a..9c743a5b6 100644
--- a/src/main/resources/assets/admin/common/js/ui/form/FormItem.ts
+++ b/src/main/resources/assets/admin/common/js/ui/form/FormItem.ts
@@ -166,7 +166,7 @@ export class FormItemBuilder {
 
     constructor(input: FormItemEl) {
         if (!input) {
-            throw new Error(`Input can't be null.`);
+            throw new Error('Input can\'t be null.');
         }
         this.input = input;
     }
diff --git a/src/main/resources/assets/admin/common/js/ui/grid/Grid.ts b/src/main/resources/assets/admin/common/js/ui/grid/Grid.ts
index f6111fe1d..7bb8aaaca 100644
--- a/src/main/resources/assets/admin/common/js/ui/grid/Grid.ts
+++ b/src/main/resources/assets/admin/common/js/ui/grid/Grid.ts
@@ -461,13 +461,13 @@ export class Grid<T extends Slick.SlickData>
 
     subscribeBeforeMoveRows(callback: (e: any, args: any) => void) {
         if (this.rowManagerPlugin) {
-            (<Slick.Event<Slick.OnMoveRowsEventData>>this.rowManagerPlugin.onBeforeMoveRows).subscribe(callback);
+            (this.rowManagerPlugin.onBeforeMoveRows).subscribe(callback);
         }
     }
 
     subscribeMoveRows(callback: (e: any, args: any) => void) {
         if (this.rowManagerPlugin) {
-            (<Slick.Event<Slick.OnMoveRowsEventData>>this.rowManagerPlugin.onMoveRows).subscribe(callback);
+            (this.rowManagerPlugin.onMoveRows).subscribe(callback);
         }
     }
 
diff --git a/src/main/resources/assets/admin/common/js/ui/security/PrincipalComboBox.ts b/src/main/resources/assets/admin/common/js/ui/security/PrincipalComboBox.ts
index 6cc2ab402..289933eda 100644
--- a/src/main/resources/assets/admin/common/js/ui/security/PrincipalComboBox.ts
+++ b/src/main/resources/assets/admin/common/js/ui/security/PrincipalComboBox.ts
@@ -89,8 +89,8 @@ export class PrincipalSelectedOptionsView
         let key = PrincipalKey.fromString(id);
 
         return Option.create<Principal>()
-                .setValue(id)
-                .setDisplayValue(<Principal>Principal.create().setKey(key).setDisplayName(key.getId()).build())
+            .setValue(id)
+            .setDisplayValue(Principal.create().setKey(key).setDisplayName(key.getId()).build())
                 .setEmpty(true)
                 .build();
     }
diff --git a/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseRichComboBox.ts b/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseRichComboBox.ts
index 112d2d778..9e7322754 100644
--- a/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseRichComboBox.ts
+++ b/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseRichComboBox.ts
@@ -399,7 +399,7 @@ export class BaseRichComboBox<OPTION_DATA_TYPE, LOADER_DATA_TYPE>
         this.comboBox.setLoader(loader);
 
         this.comboBox.onOptionFilterInputValueChanged((event: OptionFilterInputValueChangedEvent) => {
-            return this.reload(event.getNewValue());
+            this.reload(event.getNewValue());
         });
 
         this.loader.onLoadingData((event: LoadingDataEvent) => {
diff --git a/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseSelectedOptionsView.ts b/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseSelectedOptionsView.ts
index ad773b8ff..f7f40f26d 100644
--- a/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseSelectedOptionsView.ts
+++ b/src/main/resources/assets/admin/common/js/ui/selector/combobox/BaseSelectedOptionsView.ts
@@ -206,14 +206,14 @@ export class BaseSelectedOptionsView<T>
     }
 
     protected handleDnDStart(ui: JQueryUI.SortableUIParams): void {
-        let draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+        let draggedElement = Element.fromHtmlElement(ui.item[0]);
         this.draggingIndex = draggedElement.getSiblingIndex();
     }
 
     protected handleDnDUpdate(ui: JQueryUI.SortableUIParams) {
 
         if (this.draggingIndex >= 0) {
-            let draggedElement = Element.fromHtmlElement(<HTMLElement>ui.item[0]);
+            let draggedElement = Element.fromHtmlElement(ui.item[0]);
             let draggedToIndex = draggedElement.getSiblingIndex();
             this.handleMovedOccurrence(this.draggingIndex, draggedToIndex);
         }
diff --git a/src/main/resources/assets/admin/common/js/ui/selector/combobox/ComboBox.ts b/src/main/resources/assets/admin/common/js/ui/selector/combobox/ComboBox.ts
index 41988b5f6..e7c85f470 100644
--- a/src/main/resources/assets/admin/common/js/ui/selector/combobox/ComboBox.ts
+++ b/src/main/resources/assets/admin/common/js/ui/selector/combobox/ComboBox.ts
@@ -354,16 +354,10 @@ export class ComboBox<OPTION_DISPLAY_VALUE>
         let optionsMap = this.getDisplayedOptions().map((x) => {
             return x.getValue();
         }).join();
-        let selectedOptions: Option<OPTION_DISPLAY_VALUE>[] = this.getSelectedOptions();
-        let filteredOption = [];
-        let gridOptions = [];
-        for (let k in selectedOptions) {
-            if (optionsMap.search(selectedOptions[k].getValue()) >= 0) {
-                filteredOption.push(selectedOptions[k].getValue());
-            }
-        }
-        this.comboBoxDropdown.getDropdownGrid().getGrid().getSelectedRows().forEach((row: number) => {
-            gridOptions.push(this.comboBoxDropdown.getDropdownGrid().getOptionByRow(row).getValue());
+        const selectedOptions: Option<OPTION_DISPLAY_VALUE>[] = this.getSelectedOptions();
+        const filteredOption = selectedOptions.filter(o => optionsMap.search(o.getValue()) >= 0);
+        const gridOptions = this.comboBoxDropdown.getDropdownGrid().getGrid().getSelectedRows().map((row: number) => {
+            return this.comboBoxDropdown.getDropdownGrid().getOptionByRow(row).getValue();
         });
 
         return (filteredOption.length !== gridOptions.length) ||
diff --git a/src/main/resources/assets/admin/common/js/ui/tab/TabItem.ts b/src/main/resources/assets/admin/common/js/ui/tab/TabItem.ts
index b9d4ccee9..03df34dc9 100644
--- a/src/main/resources/assets/admin/common/js/ui/tab/TabItem.ts
+++ b/src/main/resources/assets/admin/common/js/ui/tab/TabItem.ts
@@ -14,7 +14,7 @@ export class TabItem
     extends LiEl
     implements NavigationItem {
 
-    static tabIndexFormat: string = `{0}. `;
+    static tabIndexFormat: string = '{0}. ';
     private index: number;
     private label: string;
     private labelEl: AEl;
@@ -142,7 +142,7 @@ export class TabItem
 
     onClosed(listener: (event: TabItemClosedEvent) => void) {
         if (this.closeAction) {
-            throw new Error(`Failed to set 'on closed' listener. Close action is already setted.`);
+            throw new Error('Failed to set \'on closed\' listener. Close action is already setted.');
         } else {
             this.closedListeners.push(listener);
         }
diff --git a/src/main/resources/assets/admin/common/js/ui/time/TimePicker.ts b/src/main/resources/assets/admin/common/js/ui/time/TimePicker.ts
index bf7b15d58..2c2fe4cfb 100644
--- a/src/main/resources/assets/admin/common/js/ui/time/TimePicker.ts
+++ b/src/main/resources/assets/admin/common/js/ui/time/TimePicker.ts
@@ -89,7 +89,7 @@ export class TimePicker
                 this.setTime(null, null);
                 this.hidePopup();
             } else {
-                let parsedTime = typedTime.match(/^\s*([0-2][0-9]:[0-5][0-9])\s*$/);
+                let parsedTime = /^\s*([0-2][0-9]:[0-5][0-9])\s*$/.exec(typedTime);
                 if (parsedTime && parsedTime.length === 2) {
                     let splitTime = parsedTime[1].split(':');
                     this.setTime(parseInt(splitTime[0], 10), parseInt(splitTime[1], 10));
diff --git a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGrid.ts b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGrid.ts
index b603044aa..28949dbdb 100644
--- a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGrid.ts
+++ b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGrid.ts
@@ -97,7 +97,7 @@ export class TreeGrid<DATA extends IDentifiable>
 
         event.preventDefault();
         event.stopImmediatePropagation();
-    }
+    };
 
     constructor(builder: TreeGridBuilder<DATA>) {
 
diff --git a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGridToolbar.ts b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGridToolbar.ts
index 4188892de..7eb7372a0 100644
--- a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGridToolbar.ts
+++ b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeGridToolbar.ts
@@ -26,7 +26,7 @@ export class TreeGridToolbar
         this.refreshButton = new Button();
         this.refreshButton
             .addClass(StyleHelper.getCommonIconCls('loop'))
-            .onClicked(() => treeGrid.reload());
+            .onClicked(() => void treeGrid.reload());
 
         this.leftWrapper = new DivEl('left-wrapper');
         this.leftWrapper.appendChildren<Element>(this.selectionController, this.selectionPanelToggler);
diff --git a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeNode.ts b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeNode.ts
index 7e3109c39..522ab83da 100644
--- a/src/main/resources/assets/admin/common/js/ui/treegrid/TreeNode.ts
+++ b/src/main/resources/assets/admin/common/js/ui/treegrid/TreeNode.ts
@@ -116,6 +116,7 @@ export class TreeNode<DATA extends IDentifiable>
     }
 
     getRoot(): TreeNode<DATA> {
+        // eslint-disable-next-line @typescript-eslint/no-this-alias
         let root: TreeNode<DATA> = this;
         let parent: TreeNode<DATA> = this.getParent();
         while (parent) {
@@ -183,6 +184,7 @@ export class TreeNode<DATA extends IDentifiable>
         if (!child) {
             return;
         }
+        // eslint-disable-next-line @typescript-eslint/no-for-in-array
         for (let curChildIndex in this.children) {
             if (this.children[curChildIndex].getId() === child.getId()) {
                 this.children[curChildIndex] = child;
diff --git a/src/main/resources/assets/admin/common/js/ui/uploader/UploaderEl.ts b/src/main/resources/assets/admin/common/js/ui/uploader/UploaderEl.ts
index 8889adebb..f6d1d7d35 100644
--- a/src/main/resources/assets/admin/common/js/ui/uploader/UploaderEl.ts
+++ b/src/main/resources/assets/admin/common/js/ui/uploader/UploaderEl.ts
@@ -962,7 +962,7 @@ export class UploaderEl<MODEL extends Equitable>
         const focusableElements: HTMLCollectionOf<HTMLInputElement> =
             this.getDefaultDropzoneContainer().getHTMLElement().getElementsByTagName('input');
         for (let i = 0; i < focusableElements.length; i++) {
-            const el = <HTMLInputElement>focusableElements.item(i);
+            const el = focusableElements.item(i);
             el.tabIndex = -1;
         }
     }
diff --git a/src/main/resources/assets/admin/common/js/util/AppHelper.ts b/src/main/resources/assets/admin/common/js/util/AppHelper.ts
index c3ce951d0..b544bd32f 100644
--- a/src/main/resources/assets/admin/common/js/util/AppHelper.ts
+++ b/src/main/resources/assets/admin/common/js/util/AppHelper.ts
@@ -3,6 +3,8 @@ import {Element} from '../dom/Element';
 import {Body} from '../dom/Body';
 import {WindowDOM} from '../dom/WindowDOM';
 
+/* eslint-disable @typescript-eslint/ban-ts-comment, @typescript-eslint/no-this-alias, prefer-rest-params */
+
 export class AppHelper {
 
     // Returns a function, that, as long as it continues to be invoked, will not
diff --git a/src/main/resources/assets/admin/common/js/util/loader/ImageLoader.ts b/src/main/resources/assets/admin/common/js/util/loader/ImageLoader.ts
index 84356d757..c612e7b2b 100644
--- a/src/main/resources/assets/admin/common/js/util/loader/ImageLoader.ts
+++ b/src/main/resources/assets/admin/common/js/util/loader/ImageLoader.ts
@@ -7,10 +7,10 @@ export class ImageLoader {
         let returnImage: HTMLImageElement;
         url = encodeURI(url);
 
-        for (let i in ImageLoader.cachedImages) {
-            if (ImageLoader.cachedImages[i].src === url) {
+        for (let cachedImage of ImageLoader.cachedImages) {
+            if (cachedImage.src === url) {
                 imageFound = true;
-                returnImage = ImageLoader.cachedImages[i];
+                returnImage = cachedImage;
             }
         }
 
diff --git a/src/main/resources/assets/admin/common/js/validator/Validator.ts b/src/main/resources/assets/admin/common/js/validator/Validator.ts
index da10236fa..cc14032a9 100644
--- a/src/main/resources/assets/admin/common/js/validator/Validator.ts
+++ b/src/main/resources/assets/admin/common/js/validator/Validator.ts
@@ -13,6 +13,6 @@ export class Validator {
             return true;
         }
 
-        return !text.match(/<script>/i) && !text.match(/%3cscript%3e/i);
+        return !(/<script>/i.exec(text)) && !(/%3cscript%3e/i.exec(text));
     }
 }