fix: add escape to CSS

Closes: microsoft/TypeScript#21090

Author: alan-agius4

baselines/dom.generated.d.ts

@@ -1515,7 +1515,7 @@ interface Blob {
 
 declare var Blob: {
     prototype: Blob;
-    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+    new(blobParts?: any[], options?: BlobPropertyBag): Blob;
 };
 
 interface Cache {
@@ -1819,6 +1819,7 @@ declare var CryptoKeyPair: {
 };
 
 interface CSS {
+    escape(value?: string): string;
     supports(property: string, value?: string): boolean;
 }
 declare var CSS: CSS;
@@ -2377,7 +2378,7 @@ interface CustomEvent<T = any> extends Event {
 
 declare var CustomEvent: {
     prototype: CustomEvent;
-    new<T>(typeArg: string, eventInitDict?: CustomEventInit<T>): CustomEvent<T>;
+    new <T>(typeArg: string, eventInitDict?: CustomEventInit<T>): CustomEvent<T>;
 };
 
 interface DataCue extends TextTrackCue {
@@ -3759,7 +3760,7 @@ interface File extends Blob {
 
 declare var File: {
     prototype: File;
-    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+    new(parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
 };
 
 interface FileList {
@@ -3825,7 +3826,7 @@ interface FormData {
 
 declare var FormData: {
     prototype: FormData;
-    new (form?: HTMLFormElement): FormData;
+    new(form?: HTMLFormElement): FormData;
 };
 
 interface GainNode extends AudioNode {
@@ -9925,7 +9926,7 @@ interface StorageEvent extends Event {
 
 declare var StorageEvent: {
     prototype: StorageEvent;
-    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+    new(type: string, eventInitDict?: StorageEventInit): StorageEvent;
 };
 
 interface StyleMedia {
@@ -14324,7 +14325,7 @@ declare var URLSearchParams: {
     /**
      * Constructor returning a URLSearchParams object.
      */
-    new (init?: string | URLSearchParams): URLSearchParams;
+    new(init?: string | URLSearchParams): URLSearchParams;
 };
 
 interface NodeListOf<TNode extends Node> extends NodeList {
@@ -14671,7 +14672,7 @@ interface DOMRectReadOnly {
 
 declare var DOMRectReadOnly: {
     prototype: DOMRectReadOnly;
-    new (x?: number, y?: number, width?: number, height?: number): DOMRectReadOnly;
+    new(x?: number, y?: number, width?: number, height?: number): DOMRectReadOnly;
     fromRect(rectangle?: DOMRectInit): DOMRectReadOnly;
 };
 
@@ -14702,7 +14703,7 @@ interface DOMRect extends DOMRectReadOnly {
 
 declare var DOMRect: {
     prototype: DOMRect;
-    new (x?: number, y?: number, width?: number, height?: number): DOMRect;
+    new(x?: number, y?: number, width?: number, height?: number): DOMRect;
     fromRect(rectangle?: DOMRectInit): DOMRect;
 };
 
@@ -14860,7 +14861,7 @@ interface AnimationOptions {
     duration?: number;
     easing?: string;
     endDelay?: number;
-    fill?: "none" | "forwards" | "backwards" | "both"| "auto";
+    fill?: "none" | "forwards" | "backwards" | "both" | "auto";
     iterationStart?: number;
     iterations?: number;
 }
@@ -15431,7 +15432,7 @@ type ScrollRestoration = "auto" | "manual";
 type FormDataEntryValue = string | File;
 type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
 type HeadersInit = Headers | string[][] | { [key: string]: string };
-type AnimationKeyFrame = {offset?: number | null | (number | null)[]} & {[key: string]: string | number | number[] | string[]};
+type AnimationKeyFrame = { offset?: number | null | (number | null)[] } & { [key: string]: string | number | number[] | string[] };
 type AppendMode = "segments" | "sequence";
 type AudioContextState = "suspended" | "running" | "closed";
 type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";