diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index ce55651bd..cc6f05cbb 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -685,15 +685,18 @@ interface IntersectionObserverEntryInit {
     intersectionRatio: number;
     intersectionRect: DOMRectInit;
     isIntersecting: boolean;
+    isVisible: boolean;
     rootBounds: DOMRectInit | null;
     target: Element;
     time: DOMHighResTimeStamp;
 }
 
 interface IntersectionObserverInit {
+    delay?: number;
     root?: Element | Document | null;
     rootMargin?: string;
     threshold?: number | number[];
+    trackVisibility?: boolean;
 }
 
 interface JsonWebKey {
@@ -899,6 +902,7 @@ interface MediaStreamTrackEventInit extends EventInit {
 interface MediaTrackCapabilities {
     aspectRatio?: DoubleRange;
     autoGainControl?: boolean[];
+    backgroundBlur?: boolean[];
     channelCount?: ULongRange;
     deviceId?: string;
     displaySurface?: string;
@@ -916,6 +920,7 @@ interface MediaTrackCapabilities {
 interface MediaTrackConstraintSet {
     aspectRatio?: ConstrainDouble;
     autoGainControl?: ConstrainBoolean;
+    backgroundBlur?: ConstrainBoolean;
     channelCount?: ConstrainULong;
     deviceId?: ConstrainDOMString;
     displaySurface?: ConstrainDOMString;
@@ -937,6 +942,7 @@ interface MediaTrackConstraints extends MediaTrackConstraintSet {
 interface MediaTrackSettings {
     aspectRatio?: number;
     autoGainControl?: boolean;
+    backgroundBlur?: boolean;
     channelCount?: number;
     deviceId?: string;
     displaySurface?: string;
@@ -954,6 +960,7 @@ interface MediaTrackSettings {
 interface MediaTrackSupportedConstraints {
     aspectRatio?: boolean;
     autoGainControl?: boolean;
+    backgroundBlur?: boolean;
     channelCount?: boolean;
     deviceId?: boolean;
     displaySurface?: boolean;
@@ -3133,6 +3140,8 @@ interface Blob {
     readonly type: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/arrayBuffer) */
     arrayBuffer(): Promise<ArrayBuffer>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/slice) */
     slice(start?: number, end?: number, contentType?: string): Blob;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/stream) */
@@ -3168,6 +3177,8 @@ interface Body {
     arrayBuffer(): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/blob) */
     blob(): Promise<Blob>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/formData) */
     formData(): Promise<FormData>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/json) */
@@ -4109,9 +4120,11 @@ interface CSSStyleDeclaration {
     columns: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/contain) */
     contain: string;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-block-size) */
     containIntrinsicBlockSize: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-height) */
     containIntrinsicHeight: string;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-inline-size) */
     containIntrinsicInlineSize: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-size) */
     containIntrinsicSize: string;
@@ -6148,27 +6161,49 @@ declare var DOMImplementation: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix) */
 interface DOMMatrix extends DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     f: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m44: number;
     invertSelf(): DOMMatrix;
     multiplySelf(other?: DOMMatrixInit): DOMMatrix;
@@ -6200,29 +6235,51 @@ declare var WebKitCSSMatrix: typeof DOMMatrix;
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly) */
 interface DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly f: number;
     readonly is2D: boolean;
     readonly isIdentity: boolean;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m44: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly/flipX) */
     flipX(): DOMMatrix;
@@ -10052,6 +10109,7 @@ interface HTMLElement extends Element, ElementCSSInlineStyle, ElementContentEdit
     title: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/translate) */
     translate: boolean;
+    writingSuggestions: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/attachInternals) */
     attachInternals(): ElementInternals;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/click) */
@@ -11117,7 +11175,11 @@ interface HTMLLinkElement extends HTMLElement, LinkStyle {
     disabled: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLLinkElement/fetchPriority) */
     fetchPriority: string;
-    /** Sets or retrieves a destination URL or an anchor point. */
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLLinkElement/href)
+     */
     href: string;
     /**
      * Sets or retrieves the language code of the object.
@@ -21588,7 +21650,7 @@ interface SubtleCrypto {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/decrypt) */
     decrypt(algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AesGcmParams, key: CryptoKey, data: BufferSource): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveBits) */
-    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length: number): Promise<ArrayBuffer>;
+    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length?: number | null): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveKey) */
     deriveKey(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | HkdfParams | Pbkdf2Params, extractable: boolean, keyUsages: KeyUsage[]): Promise<CryptoKey>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/digest) */
@@ -26149,7 +26211,11 @@ declare var XPathEvaluator: {
 interface XPathEvaluatorBase {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/createExpression) */
     createExpression(expression: string, resolver?: XPathNSResolver | null): XPathExpression;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/createNSResolver) */
+    /**
+     * @deprecated
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/createNSResolver)
+     */
     createNSResolver(nodeResolver: Node): Node;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/evaluate) */
     evaluate(expression: string, contextNode: Node, resolver?: XPathNSResolver | null, type?: number, result?: XPathResult | null): XPathResult;
@@ -27881,7 +27947,7 @@ type ReportList = Report[];
 type RequestInfo = Request | string;
 type TexImageSource = ImageBitmap | ImageData | HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | OffscreenCanvas | VideoFrame;
 type TimerHandler = string | Function;
-type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | MediaSourceHandle | ReadableStream | WritableStream | TransformStream | VideoFrame | ArrayBuffer;
+type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | MediaSourceHandle | ReadableStream | WritableStream | TransformStream | VideoFrame | MIDIAccess | ArrayBuffer;
 type Uint32List = Uint32Array | GLuint[];
 type VibratePattern = number | number[];
 type WindowProxy = Window;
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 5cdec8941..48a875b70 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -346,6 +346,14 @@ interface LockOptions {
     steal?: boolean;
 }
 
+interface MIDIConnectionEventInit extends EventInit {
+    port?: MIDIPort;
+}
+
+interface MIDIMessageEventInit extends EventInit {
+    data?: Uint8Array;
+}
+
 interface MediaCapabilitiesDecodingInfo extends MediaCapabilitiesInfo {
     configuration?: MediaDecodingConfiguration;
 }
@@ -855,6 +863,8 @@ interface Blob {
     readonly type: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/arrayBuffer) */
     arrayBuffer(): Promise<ArrayBuffer>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/slice) */
     slice(start?: number, end?: number, contentType?: string): Blob;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/stream) */
@@ -877,6 +887,8 @@ interface Body {
     arrayBuffer(): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/blob) */
     blob(): Promise<Blob>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/formData) */
     formData(): Promise<FormData>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/json) */
@@ -1809,27 +1821,49 @@ declare var DOMException: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix) */
 interface DOMMatrix extends DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     f: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m44: number;
     invertSelf(): DOMMatrix;
     multiplySelf(other?: DOMMatrixInit): DOMMatrix;
@@ -1854,29 +1888,51 @@ declare var DOMMatrix: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly) */
 interface DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly f: number;
     readonly is2D: boolean;
     readonly isIdentity: boolean;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m44: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly/flipX) */
     flipX(): DOMMatrix;
@@ -3577,6 +3633,176 @@ declare var LockManager: {
     new(): LockManager;
 };
 
+interface MIDIAccessEventMap {
+    "statechange": Event;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess)
+ */
+interface MIDIAccess extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/inputs) */
+    readonly inputs: MIDIInputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/statechange_event) */
+    onstatechange: ((this: MIDIAccess, ev: Event) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/outputs) */
+    readonly outputs: MIDIOutputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/sysexEnabled) */
+    readonly sysexEnabled: boolean;
+    addEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIAccess: {
+    prototype: MIDIAccess;
+    new(): MIDIAccess;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent)
+ */
+interface MIDIConnectionEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent/port) */
+    readonly port: MIDIPort | null;
+}
+
+declare var MIDIConnectionEvent: {
+    prototype: MIDIConnectionEvent;
+    new(type: string, eventInitDict?: MIDIConnectionEventInit): MIDIConnectionEvent;
+};
+
+interface MIDIInputEventMap extends MIDIPortEventMap {
+    "midimessage": MIDIMessageEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput)
+ */
+interface MIDIInput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput/midimessage_event) */
+    onmidimessage: ((this: MIDIInput, ev: MIDIMessageEvent) => any) | null;
+    addEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIInput: {
+    prototype: MIDIInput;
+    new(): MIDIInput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInputMap)
+ */
+interface MIDIInputMap {
+    forEach(callbackfn: (value: MIDIInput, key: string, parent: MIDIInputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIInputMap: {
+    prototype: MIDIInputMap;
+    new(): MIDIInputMap;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent)
+ */
+interface MIDIMessageEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent/data) */
+    readonly data: Uint8Array | null;
+}
+
+declare var MIDIMessageEvent: {
+    prototype: MIDIMessageEvent;
+    new(type: string, eventInitDict?: MIDIMessageEventInit): MIDIMessageEvent;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput)
+ */
+interface MIDIOutput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: number[], timestamp?: DOMHighResTimeStamp): void;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIOutput: {
+    prototype: MIDIOutput;
+    new(): MIDIOutput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutputMap)
+ */
+interface MIDIOutputMap {
+    forEach(callbackfn: (value: MIDIOutput, key: string, parent: MIDIOutputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIOutputMap: {
+    prototype: MIDIOutputMap;
+    new(): MIDIOutputMap;
+};
+
+interface MIDIPortEventMap {
+    "statechange": MIDIConnectionEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort)
+ */
+interface MIDIPort extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/connection) */
+    readonly connection: MIDIPortConnectionState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/id) */
+    readonly id: string;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/manufacturer) */
+    readonly manufacturer: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/name) */
+    readonly name: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/statechange_event) */
+    onstatechange: ((this: MIDIPort, ev: MIDIConnectionEvent) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/state) */
+    readonly state: MIDIPortDeviceState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/type) */
+    readonly type: MIDIPortType;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/version) */
+    readonly version: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/close) */
+    close(): Promise<MIDIPort>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/open) */
+    open(): Promise<MIDIPort>;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIPort: {
+    prototype: MIDIPort;
+    new(): MIDIPort;
+};
+
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities) */
 interface MediaCapabilities {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities/decodingInfo) */
@@ -4379,6 +4605,8 @@ interface PushMessageData {
     arrayBuffer(): ArrayBuffer;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/blob) */
     blob(): Blob;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/bytes) */
+    bytes(): Uint8Array;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/json) */
     json(): any;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/text) */
@@ -4971,7 +5199,7 @@ interface SubtleCrypto {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/decrypt) */
     decrypt(algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AesGcmParams, key: CryptoKey, data: BufferSource): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveBits) */
-    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length: number): Promise<ArrayBuffer>;
+    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length?: number | null): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveKey) */
     deriveKey(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | HkdfParams | Pbkdf2Params, extractable: boolean, keyUsages: KeyUsage[]): Promise<CryptoKey>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/digest) */
@@ -8545,7 +8773,7 @@ type ReportList = Report[];
 type RequestInfo = Request | string;
 type TexImageSource = ImageBitmap | ImageData | OffscreenCanvas;
 type TimerHandler = string | Function;
-type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | ReadableStream | WritableStream | TransformStream | ArrayBuffer;
+type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | ReadableStream | WritableStream | TransformStream | MIDIAccess | ArrayBuffer;
 type Uint32List = Uint32Array | GLuint[];
 type XMLHttpRequestBodyInit = Blob | BufferSource | FormData | URLSearchParams | string;
 type BinaryType = "arraybuffer" | "blob";
@@ -8584,6 +8812,9 @@ type KeyFormat = "jwk" | "pkcs8" | "raw" | "spki";
 type KeyType = "private" | "public" | "secret";
 type KeyUsage = "decrypt" | "deriveBits" | "deriveKey" | "encrypt" | "sign" | "unwrapKey" | "verify" | "wrapKey";
 type LockMode = "exclusive" | "shared";
+type MIDIPortConnectionState = "closed" | "open" | "pending";
+type MIDIPortDeviceState = "connected" | "disconnected";
+type MIDIPortType = "input" | "output";
 type MediaDecodingType = "file" | "media-source" | "webrtc";
 type MediaEncodingType = "record" | "webrtc";
 type NotificationDirection = "auto" | "ltr" | "rtl";
diff --git a/baselines/serviceworker.iterable.generated.d.ts b/baselines/serviceworker.iterable.generated.d.ts
index 61c3fe9dd..d3176da34 100644
--- a/baselines/serviceworker.iterable.generated.d.ts
+++ b/baselines/serviceworker.iterable.generated.d.ts
@@ -94,6 +94,17 @@ interface IDBObjectStore {
     createIndex(name: string, keyPath: string | Iterable<string>, options?: IDBIndexParameters): IDBIndex;
 }
 
+interface MIDIInputMap extends ReadonlyMap<string, MIDIInput> {
+}
+
+interface MIDIOutput {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: Iterable<number>, timestamp?: DOMHighResTimeStamp): void;
+}
+
+interface MIDIOutputMap extends ReadonlyMap<string, MIDIOutput> {
+}
+
 interface MessageEvent<T = any> {
     /** @deprecated */
     initMessageEvent(type: string, bubbles?: boolean, cancelable?: boolean, data?: any, origin?: string, lastEventId?: string, source?: MessageEventSource | null, ports?: Iterable<MessagePort>): void;
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 9ad14b70f..11930bb02 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -321,6 +321,14 @@ interface LockOptions {
     steal?: boolean;
 }
 
+interface MIDIConnectionEventInit extends EventInit {
+    port?: MIDIPort;
+}
+
+interface MIDIMessageEventInit extends EventInit {
+    data?: Uint8Array;
+}
+
 interface MediaCapabilitiesDecodingInfo extends MediaCapabilitiesInfo {
     configuration?: MediaDecodingConfiguration;
 }
@@ -827,6 +835,8 @@ interface Blob {
     readonly type: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/arrayBuffer) */
     arrayBuffer(): Promise<ArrayBuffer>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/slice) */
     slice(start?: number, end?: number, contentType?: string): Blob;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/stream) */
@@ -849,6 +859,8 @@ interface Body {
     arrayBuffer(): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/blob) */
     blob(): Promise<Blob>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/formData) */
     formData(): Promise<FormData>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/json) */
@@ -1736,27 +1748,49 @@ declare var DOMException: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix) */
 interface DOMMatrix extends DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     f: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m44: number;
     invertSelf(): DOMMatrix;
     multiplySelf(other?: DOMMatrixInit): DOMMatrix;
@@ -1781,29 +1815,51 @@ declare var DOMMatrix: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly) */
 interface DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly f: number;
     readonly is2D: boolean;
     readonly isIdentity: boolean;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m44: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly/flipX) */
     flipX(): DOMMatrix;
@@ -3466,6 +3522,176 @@ declare var LockManager: {
     new(): LockManager;
 };
 
+interface MIDIAccessEventMap {
+    "statechange": Event;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess)
+ */
+interface MIDIAccess extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/inputs) */
+    readonly inputs: MIDIInputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/statechange_event) */
+    onstatechange: ((this: MIDIAccess, ev: Event) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/outputs) */
+    readonly outputs: MIDIOutputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/sysexEnabled) */
+    readonly sysexEnabled: boolean;
+    addEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIAccess: {
+    prototype: MIDIAccess;
+    new(): MIDIAccess;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent)
+ */
+interface MIDIConnectionEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent/port) */
+    readonly port: MIDIPort | null;
+}
+
+declare var MIDIConnectionEvent: {
+    prototype: MIDIConnectionEvent;
+    new(type: string, eventInitDict?: MIDIConnectionEventInit): MIDIConnectionEvent;
+};
+
+interface MIDIInputEventMap extends MIDIPortEventMap {
+    "midimessage": MIDIMessageEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput)
+ */
+interface MIDIInput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput/midimessage_event) */
+    onmidimessage: ((this: MIDIInput, ev: MIDIMessageEvent) => any) | null;
+    addEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIInput: {
+    prototype: MIDIInput;
+    new(): MIDIInput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInputMap)
+ */
+interface MIDIInputMap {
+    forEach(callbackfn: (value: MIDIInput, key: string, parent: MIDIInputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIInputMap: {
+    prototype: MIDIInputMap;
+    new(): MIDIInputMap;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent)
+ */
+interface MIDIMessageEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent/data) */
+    readonly data: Uint8Array | null;
+}
+
+declare var MIDIMessageEvent: {
+    prototype: MIDIMessageEvent;
+    new(type: string, eventInitDict?: MIDIMessageEventInit): MIDIMessageEvent;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput)
+ */
+interface MIDIOutput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: number[], timestamp?: DOMHighResTimeStamp): void;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIOutput: {
+    prototype: MIDIOutput;
+    new(): MIDIOutput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutputMap)
+ */
+interface MIDIOutputMap {
+    forEach(callbackfn: (value: MIDIOutput, key: string, parent: MIDIOutputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIOutputMap: {
+    prototype: MIDIOutputMap;
+    new(): MIDIOutputMap;
+};
+
+interface MIDIPortEventMap {
+    "statechange": MIDIConnectionEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort)
+ */
+interface MIDIPort extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/connection) */
+    readonly connection: MIDIPortConnectionState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/id) */
+    readonly id: string;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/manufacturer) */
+    readonly manufacturer: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/name) */
+    readonly name: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/statechange_event) */
+    onstatechange: ((this: MIDIPort, ev: MIDIConnectionEvent) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/state) */
+    readonly state: MIDIPortDeviceState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/type) */
+    readonly type: MIDIPortType;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/version) */
+    readonly version: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/close) */
+    close(): Promise<MIDIPort>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/open) */
+    open(): Promise<MIDIPort>;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIPort: {
+    prototype: MIDIPort;
+    new(): MIDIPort;
+};
+
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities) */
 interface MediaCapabilities {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities/decodingInfo) */
@@ -4780,7 +5006,7 @@ interface SubtleCrypto {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/decrypt) */
     decrypt(algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AesGcmParams, key: CryptoKey, data: BufferSource): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveBits) */
-    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length: number): Promise<ArrayBuffer>;
+    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length?: number | null): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveKey) */
     deriveKey(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | HkdfParams | Pbkdf2Params, extractable: boolean, keyUsages: KeyUsage[]): Promise<CryptoKey>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/digest) */
@@ -8550,7 +8776,7 @@ type ReportList = Report[];
 type RequestInfo = Request | string;
 type TexImageSource = ImageBitmap | ImageData | OffscreenCanvas;
 type TimerHandler = string | Function;
-type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | ReadableStream | WritableStream | TransformStream | ArrayBuffer;
+type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | ReadableStream | WritableStream | TransformStream | MIDIAccess | ArrayBuffer;
 type Uint32List = Uint32Array | GLuint[];
 type XMLHttpRequestBodyInit = Blob | BufferSource | FormData | URLSearchParams | string;
 type BinaryType = "arraybuffer" | "blob";
@@ -8587,6 +8813,9 @@ type KeyFormat = "jwk" | "pkcs8" | "raw" | "spki";
 type KeyType = "private" | "public" | "secret";
 type KeyUsage = "decrypt" | "deriveBits" | "deriveKey" | "encrypt" | "sign" | "unwrapKey" | "verify" | "wrapKey";
 type LockMode = "exclusive" | "shared";
+type MIDIPortConnectionState = "closed" | "open" | "pending";
+type MIDIPortDeviceState = "connected" | "disconnected";
+type MIDIPortType = "input" | "output";
 type MediaDecodingType = "file" | "media-source" | "webrtc";
 type MediaEncodingType = "record" | "webrtc";
 type NotificationDirection = "auto" | "ltr" | "rtl";
diff --git a/baselines/sharedworker.iterable.generated.d.ts b/baselines/sharedworker.iterable.generated.d.ts
index bf594e6a5..ad4ee45fa 100644
--- a/baselines/sharedworker.iterable.generated.d.ts
+++ b/baselines/sharedworker.iterable.generated.d.ts
@@ -94,6 +94,17 @@ interface IDBObjectStore {
     createIndex(name: string, keyPath: string | Iterable<string>, options?: IDBIndexParameters): IDBIndex;
 }
 
+interface MIDIInputMap extends ReadonlyMap<string, MIDIInput> {
+}
+
+interface MIDIOutput {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: Iterable<number>, timestamp?: DOMHighResTimeStamp): void;
+}
+
+interface MIDIOutputMap extends ReadonlyMap<string, MIDIOutput> {
+}
+
 interface MessageEvent<T = any> {
     /** @deprecated */
     initMessageEvent(type: string, bubbles?: boolean, cancelable?: boolean, data?: any, origin?: string, lastEventId?: string, source?: MessageEventSource | null, ports?: Iterable<MessagePort>): void;
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index fd3efc674..7ea5a7ceb 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -365,6 +365,14 @@ interface LockOptions {
     steal?: boolean;
 }
 
+interface MIDIConnectionEventInit extends EventInit {
+    port?: MIDIPort;
+}
+
+interface MIDIMessageEventInit extends EventInit {
+    data?: Uint8Array;
+}
+
 interface MediaCapabilitiesDecodingInfo extends MediaCapabilitiesInfo {
     configuration?: MediaDecodingConfiguration;
 }
@@ -1002,6 +1010,8 @@ interface Blob {
     readonly type: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/arrayBuffer) */
     arrayBuffer(): Promise<ArrayBuffer>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/slice) */
     slice(start?: number, end?: number, contentType?: string): Blob;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Blob/stream) */
@@ -1024,6 +1034,8 @@ interface Body {
     arrayBuffer(): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/blob) */
     blob(): Promise<Blob>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/bytes) */
+    bytes(): Promise<Uint8Array>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/formData) */
     formData(): Promise<FormData>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/json) */
@@ -1956,27 +1968,49 @@ declare var DOMException: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix) */
 interface DOMMatrix extends DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     f: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrix#instance_properties) */
     m44: number;
     invertSelf(): DOMMatrix;
     multiplySelf(other?: DOMMatrixInit): DOMMatrix;
@@ -2001,29 +2035,51 @@ declare var DOMMatrix: {
 
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly) */
 interface DOMMatrixReadOnly {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly a: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly b: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly c: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly d: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly e: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly f: number;
     readonly is2D: boolean;
     readonly isIdentity: boolean;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m11: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m12: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m13: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m14: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m21: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m22: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m23: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m24: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m31: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m32: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m33: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m34: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m41: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m42: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m43: number;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly#instance_properties) */
     readonly m44: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DOMMatrixReadOnly/flipX) */
     flipX(): DOMMatrix;
@@ -3843,6 +3899,176 @@ declare var LockManager: {
     new(): LockManager;
 };
 
+interface MIDIAccessEventMap {
+    "statechange": Event;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess)
+ */
+interface MIDIAccess extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/inputs) */
+    readonly inputs: MIDIInputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/statechange_event) */
+    onstatechange: ((this: MIDIAccess, ev: Event) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/outputs) */
+    readonly outputs: MIDIOutputMap;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIAccess/sysexEnabled) */
+    readonly sysexEnabled: boolean;
+    addEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIAccessEventMap>(type: K, listener: (this: MIDIAccess, ev: MIDIAccessEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIAccess: {
+    prototype: MIDIAccess;
+    new(): MIDIAccess;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent)
+ */
+interface MIDIConnectionEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIConnectionEvent/port) */
+    readonly port: MIDIPort | null;
+}
+
+declare var MIDIConnectionEvent: {
+    prototype: MIDIConnectionEvent;
+    new(type: string, eventInitDict?: MIDIConnectionEventInit): MIDIConnectionEvent;
+};
+
+interface MIDIInputEventMap extends MIDIPortEventMap {
+    "midimessage": MIDIMessageEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput)
+ */
+interface MIDIInput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInput/midimessage_event) */
+    onmidimessage: ((this: MIDIInput, ev: MIDIMessageEvent) => any) | null;
+    addEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIInputEventMap>(type: K, listener: (this: MIDIInput, ev: MIDIInputEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIInput: {
+    prototype: MIDIInput;
+    new(): MIDIInput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIInputMap)
+ */
+interface MIDIInputMap {
+    forEach(callbackfn: (value: MIDIInput, key: string, parent: MIDIInputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIInputMap: {
+    prototype: MIDIInputMap;
+    new(): MIDIInputMap;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent)
+ */
+interface MIDIMessageEvent extends Event {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIMessageEvent/data) */
+    readonly data: Uint8Array | null;
+}
+
+declare var MIDIMessageEvent: {
+    prototype: MIDIMessageEvent;
+    new(type: string, eventInitDict?: MIDIMessageEventInit): MIDIMessageEvent;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput)
+ */
+interface MIDIOutput extends MIDIPort {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: number[], timestamp?: DOMHighResTimeStamp): void;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIOutput: {
+    prototype: MIDIOutput;
+    new(): MIDIOutput;
+};
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutputMap)
+ */
+interface MIDIOutputMap {
+    forEach(callbackfn: (value: MIDIOutput, key: string, parent: MIDIOutputMap) => void, thisArg?: any): void;
+}
+
+declare var MIDIOutputMap: {
+    prototype: MIDIOutputMap;
+    new(): MIDIOutputMap;
+};
+
+interface MIDIPortEventMap {
+    "statechange": MIDIConnectionEvent;
+}
+
+/**
+ * Available only in secure contexts.
+ *
+ * [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort)
+ */
+interface MIDIPort extends EventTarget {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/connection) */
+    readonly connection: MIDIPortConnectionState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/id) */
+    readonly id: string;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/manufacturer) */
+    readonly manufacturer: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/name) */
+    readonly name: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/statechange_event) */
+    onstatechange: ((this: MIDIPort, ev: MIDIConnectionEvent) => any) | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/state) */
+    readonly state: MIDIPortDeviceState;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/type) */
+    readonly type: MIDIPortType;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/version) */
+    readonly version: string | null;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/close) */
+    close(): Promise<MIDIPort>;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIPort/open) */
+    open(): Promise<MIDIPort>;
+    addEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    removeEventListener<K extends keyof MIDIPortEventMap>(type: K, listener: (this: MIDIPort, ev: MIDIPortEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
+    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var MIDIPort: {
+    prototype: MIDIPort;
+    new(): MIDIPort;
+};
+
 /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities) */
 interface MediaCapabilities {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MediaCapabilities/decodingInfo) */
@@ -4665,6 +4891,8 @@ interface PushMessageData {
     arrayBuffer(): ArrayBuffer;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/blob) */
     blob(): Blob;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/bytes) */
+    bytes(): Uint8Array;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/json) */
     json(): any;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/PushMessageData/text) */
@@ -5350,7 +5578,7 @@ interface SubtleCrypto {
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/decrypt) */
     decrypt(algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AesGcmParams, key: CryptoKey, data: BufferSource): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveBits) */
-    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length: number): Promise<ArrayBuffer>;
+    deriveBits(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, length?: number | null): Promise<ArrayBuffer>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/deriveKey) */
     deriveKey(algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | HkdfParams | Pbkdf2Params, extractable: boolean, keyUsages: KeyUsage[]): Promise<CryptoKey>;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/SubtleCrypto/digest) */
@@ -9308,7 +9536,7 @@ type ReportList = Report[];
 type RequestInfo = Request | string;
 type TexImageSource = ImageBitmap | ImageData | OffscreenCanvas | VideoFrame;
 type TimerHandler = string | Function;
-type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | MediaSourceHandle | ReadableStream | WritableStream | TransformStream | VideoFrame | ArrayBuffer;
+type Transferable = OffscreenCanvas | ImageBitmap | MessagePort | MediaSourceHandle | ReadableStream | WritableStream | TransformStream | VideoFrame | MIDIAccess | ArrayBuffer;
 type Uint32List = Uint32Array | GLuint[];
 type XMLHttpRequestBodyInit = Blob | BufferSource | FormData | URLSearchParams | string;
 type AlphaOption = "discard" | "keep";
@@ -9353,6 +9581,9 @@ type KeyType = "private" | "public" | "secret";
 type KeyUsage = "decrypt" | "deriveBits" | "deriveKey" | "encrypt" | "sign" | "unwrapKey" | "verify" | "wrapKey";
 type LatencyMode = "quality" | "realtime";
 type LockMode = "exclusive" | "shared";
+type MIDIPortConnectionState = "closed" | "open" | "pending";
+type MIDIPortDeviceState = "connected" | "disconnected";
+type MIDIPortType = "input" | "output";
 type MediaDecodingType = "file" | "media-source" | "webrtc";
 type MediaEncodingType = "record" | "webrtc";
 type NotificationDirection = "auto" | "ltr" | "rtl";
diff --git a/baselines/webworker.iterable.generated.d.ts b/baselines/webworker.iterable.generated.d.ts
index 56feaa215..7cf17d6f6 100644
--- a/baselines/webworker.iterable.generated.d.ts
+++ b/baselines/webworker.iterable.generated.d.ts
@@ -94,6 +94,17 @@ interface IDBObjectStore {
     createIndex(name: string, keyPath: string | Iterable<string>, options?: IDBIndexParameters): IDBIndex;
 }
 
+interface MIDIInputMap extends ReadonlyMap<string, MIDIInput> {
+}
+
+interface MIDIOutput {
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/MIDIOutput/send) */
+    send(data: Iterable<number>, timestamp?: DOMHighResTimeStamp): void;
+}
+
+interface MIDIOutputMap extends ReadonlyMap<string, MIDIOutput> {
+}
+
 interface MessageEvent<T = any> {
     /** @deprecated */
     initMessageEvent(type: string, bubbles?: boolean, cancelable?: boolean, data?: any, origin?: string, lastEventId?: string, source?: MessageEventSource | null, ports?: Iterable<MessagePort>): void;
diff --git a/package-lock.json b/package-lock.json
index b15a88147..bdf88d1f9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -260,9 +260,9 @@
       }
     },
     "node_modules/@mdn/browser-compat-data": {
-      "version": "5.5.36",
-      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-5.5.36.tgz",
-      "integrity": "sha512-iPM4MKJaztppo2RlbZuPaneX/I09grYl4fCGG9hQ6gLAIcfrihdOAYmKFnlRG9krVJOUogbeMFBhh9vrN7CZqw==",
+      "version": "5.5.39",
+      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-5.5.39.tgz",
+      "integrity": "sha512-22awGsC5t7sGOT2u5EU1RA64L+F87GWYXHZkh0ofjJsLGObqNDDVSTlumd/+6YK3QwlOIEVWAsqmJymrrSqBlA==",
       "dev": true
     },
     "node_modules/@nodelib/fs.scandir": {
@@ -836,9 +836,9 @@
       "dev": true
     },
     "node_modules/@webref/css": {
-      "version": "6.12.15",
-      "resolved": "https://registry.npmjs.org/@webref/css/-/css-6.12.15.tgz",
-      "integrity": "sha512-OMq64wmRzvxQL+2ohfHIZ4mFY4HXzM3UrcXQTTfVU6h1T9luHyjoMqe4vO7vTw31WbvcPLU3dt8LC/OAz82mfg==",
+      "version": "6.13.1",
+      "resolved": "https://registry.npmjs.org/@webref/css/-/css-6.13.1.tgz",
+      "integrity": "sha512-olggJPIeUJx/ULqAaNaZXUyawC+WRjlWrphwkjssBzsjSXLQVcZvOzrrYCQyLEO8k80yq2H2gYAdJs9t8C+Keg==",
       "dev": true,
       "peerDependencies": {
         "css-tree": "^2.3.1"
@@ -851,9 +851,9 @@
       "dev": true
     },
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