refactor: use enum instead of const enum (#28052)

Const enums prevent enabling the `isolatedModules` check which is needed for fast TS compilation based on transpileModule API.

Author: pmvald

src/cdk-experimental/popover-edit/edit-event-dispatcher.ts

@@ -35,7 +35,7 @@ const FOCUS_DELAY = 0;
  * FOCUSABLE - Rendered in the dom and styled for its contents to be focusable but invisible.
  * ON - Rendered and fully visible.
  */
-export const enum HoverContentState {
+export enum HoverContentState {
   OFF = 0,
   FOCUSABLE,
   ON,

src/cdk-experimental/popover-edit/focus-escape-notifier.ts

@@ -12,7 +12,7 @@ import {FocusTrap, InteractivityChecker} from '@angular/cdk/a11y';
 import {Observable, Subject} from 'rxjs';
 
 /** Value indicating whether focus left the target area before or after the enclosed elements. */
-export const enum FocusEscapeNotifierDirection {
+export enum FocusEscapeNotifierDirection {
   START,
   END,
 }

src/cdk/a11y/focus-monitor/focus-monitor.ts

@@ -43,7 +43,7 @@ export interface FocusOptions {
 }
 
 /** Detection mode used for attributing the origin of a focus event. */
-export const enum FocusMonitorDetectionMode {
+export enum FocusMonitorDetectionMode {
   /**
    * Any mousedown, keydown, or touchstart event that happened in the previous
    * tick or the current tick will be used to assign a focus event's origin (to
@@ -623,7 +623,10 @@ export class CdkMonitorFocus implements AfterViewInit, OnDestroy {
 
   @Output() readonly cdkFocusChange = new EventEmitter<FocusOrigin>();
 
-  constructor(private _elementRef: ElementRef<HTMLElement>, private _focusMonitor: FocusMonitor) {}
+  constructor(
+    private _elementRef: ElementRef<HTMLElement>,
+    private _focusMonitor: FocusMonitor,
+  ) {}
 
   get focusOrigin(): FocusOrigin {
     return this._focusOrigin;

src/cdk/a11y/high-contrast-mode/high-contrast-mode-detector.ts

@@ -13,7 +13,7 @@ import {DOCUMENT} from '@angular/common';
 import {Subscription} from 'rxjs';
 
 /** Set of possible high-contrast mode backgrounds. */
-export const enum HighContrastMode {
+export enum HighContrastMode {
   NONE,
   BLACK_ON_WHITE,
   WHITE_ON_BLACK,
@@ -49,7 +49,10 @@ export class HighContrastModeDetector implements OnDestroy {
   private _document: Document;
   private _breakpointSubscription: Subscription;
 
-  constructor(private _platform: Platform, @Inject(DOCUMENT) document: any) {
+  constructor(
+    private _platform: Platform,
+    @Inject(DOCUMENT) document: any,
+  ) {
     this._document = document;
 
     this._breakpointSubscription = inject(BreakpointObserver)

src/cdk/collections/view-repeater.ts

@@ -58,7 +58,7 @@ export type _ViewRepeaterItemContextFactory<T, R, C extends _ViewRepeaterItemCon
 export type _ViewRepeaterItemValueResolver<T, R> = (record: IterableChangeRecord<R>) => T;
 
 /** Indicates how a view was changed by a {@link _ViewRepeater}. */
-export const enum _ViewRepeaterOperation {
+export enum _ViewRepeaterOperation {
   /** The content of an existing view was replaced with another item. */
   REPLACED,
   /** A new view was created with `createEmbeddedView`. */

src/cdk/drag-drop/drop-list-ref.ts

@@ -34,14 +34,14 @@ const DROP_PROXIMITY_THRESHOLD = 0.05;
 const SCROLL_PROXIMITY_THRESHOLD = 0.05;
 
 /** Vertical direction in which we can auto-scroll. */
-const enum AutoScrollVerticalDirection {
+enum AutoScrollVerticalDirection {
   NONE,
   UP,
   DOWN,
 }
 
 /** Horizontal direction in which we can auto-scroll. */
-const enum AutoScrollHorizontalDirection {
+enum AutoScrollHorizontalDirection {
   NONE,
   LEFT,
   RIGHT,

src/cdk/menu/menu-stack.ts

@@ -11,7 +11,7 @@ import {Observable, Subject} from 'rxjs';
 import {debounceTime, distinctUntilChanged, startWith} from 'rxjs/operators';
 
 /** The relative item in the inline menu to focus after closing all popup menus. */
-export const enum FocusNext {
+export enum FocusNext {
   nextItem,
   previousItem,
   currentItem,

src/cdk/platform/features/scrolling.ts

@@ -7,7 +7,7 @@
  */
 
 /** The possible ways the browser may handle the horizontal scroll axis in RTL languages. */
-export const enum RtlScrollAxisType {
+export enum RtlScrollAxisType {
   /**
    * scrollLeft is 0 when scrolled all the way left and (scrollWidth - clientWidth) when scrolled
    * all the way right.

src/cdk/schematics/update-tool/target-version.ts

@@ -7,7 +7,7 @@
  */
 
 /** Possible versions that can be automatically migrated by `ng update`. */
-// Used in an `Object.keys` call below so it can't be `const enum`.
+
 // tslint:disable-next-line:prefer-const-enum
 export enum TargetVersion {
   V17 = 'version 17',

src/material/card/testing/card-harness.ts

@@ -14,7 +14,7 @@ import {
 import {CardHarnessFilters} from './card-harness-filters';
 
 /** Selectors for different sections of the mat-card that can container user content. */
-export const enum MatCardSection {
+export enum MatCardSection {
   HEADER = '.mat-mdc-card-header',
   CONTENT = '.mat-mdc-card-content',
   ACTIONS = '.mat-mdc-card-actions',