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diff --git a/cli/js/dom_types.ts b/cli/js/dom_types.ts
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+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+
+/*! ****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+*******************************************************************************/
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export type BufferSource = ArrayBufferView | ArrayBuffer;
+
+export type HeadersInit =
+  | Headers
+  | Array<[string, string]>
+  | Record<string, string>;
+export type URLSearchParamsInit = string | string[][] | Record<string, string>;
+type BodyInit =
+  | Blob
+  | BufferSource
+  | FormData
+  | URLSearchParams
+  | ReadableStream
+  | string;
+export type RequestInfo = Request | string;
+type ReferrerPolicy =
+  | ""
+  | "no-referrer"
+  | "no-referrer-when-downgrade"
+  | "origin-only"
+  | "origin-when-cross-origin"
+  | "unsafe-url";
+export type BlobPart = BufferSource | Blob | string;
+export type FormDataEntryValue = DomFile | string;
+
+export interface DomIterable<K, V> {
+  keys(): IterableIterator<K>;
+  values(): IterableIterator<V>;
+  entries(): IterableIterator<[K, V]>;
+  [Symbol.iterator](): IterableIterator<[K, V]>;
+  forEach(
+    callback: (value: V, key: K, parent: this) => void,
+    thisArg?: any
+  ): void;
+}
+
+type EndingType = "transparent" | "native";
+
+export interface BlobPropertyBag {
+  type?: string;
+  ending?: EndingType;
+}
+
+interface AbortSignalEventMap {
+  abort: ProgressEvent;
+}
+
+// https://dom.spec.whatwg.org/#node
+export enum NodeType {
+  ELEMENT_NODE = 1,
+  TEXT_NODE = 3,
+  DOCUMENT_FRAGMENT_NODE = 11
+}
+
+export const eventTargetHost: unique symbol = Symbol();
+export const eventTargetListeners: unique symbol = Symbol();
+export const eventTargetMode: unique symbol = Symbol();
+export const eventTargetNodeType: unique symbol = Symbol();
+
+export interface EventTarget {
+  [eventTargetHost]: EventTarget | null;
+  [eventTargetListeners]: { [type in string]: EventListener[] };
+  [eventTargetMode]: string;
+  [eventTargetNodeType]: NodeType;
+  addEventListener(
+    type: string,
+    callback: (event: Event) => void | null,
+    options?: boolean | AddEventListenerOptions
+  ): void;
+  dispatchEvent(event: Event): boolean;
+  removeEventListener(
+    type: string,
+    callback?: (event: Event) => void | null,
+    options?: EventListenerOptions | boolean
+  ): void;
+}
+
+export interface ProgressEventInit extends EventInit {
+  lengthComputable?: boolean;
+  loaded?: number;
+  total?: number;
+}
+
+export interface URLSearchParams extends DomIterable<string, string> {
+  /**
+   * Appends a specified key/value pair as a new search parameter.
+   */
+  append(name: string, value: string): void;
+  /**
+   * Deletes the given search parameter, and its associated value,
+   * from the list of all search parameters.
+   */
+  delete(name: string): void;
+  /**
+   * Returns the first value associated to the given search parameter.
+   */
+  get(name: string): string | null;
+  /**
+   * Returns all the values association with a given search parameter.
+   */
+  getAll(name: string): string[];
+  /**
+   * Returns a Boolean indicating if such a search parameter exists.
+   */
+  has(name: string): boolean;
+  /**
+   * Sets the value associated to a given search parameter to the given value.
+   * If there were several values, delete the others.
+   */
+  set(name: string, value: string): void;
+  /**
+   * Sort all key/value pairs contained in this object in place
+   * and return undefined. The sort order is according to Unicode
+   * code points of the keys.
+   */
+  sort(): void;
+  /**
+   * Returns a query string suitable for use in a URL.
+   */
+  toString(): string;
+  /**
+   * Iterates over each name-value pair in the query
+   * and invokes the given function.
+   */
+  forEach(
+    callbackfn: (value: string, key: string, parent: this) => void,
+    thisArg?: any
+  ): void;
+}
+
+export interface EventListener {
+  handleEvent(event: Event): void;
+  readonly callback: (event: Event) => void | null;
+  readonly options: boolean | AddEventListenerOptions;
+}
+
+export interface EventInit {
+  bubbles?: boolean;
+  cancelable?: boolean;
+  composed?: boolean;
+}
+
+export interface CustomEventInit extends EventInit {
+  detail?: any;
+}
+
+export enum EventPhase {
+  NONE = 0,
+  CAPTURING_PHASE = 1,
+  AT_TARGET = 2,
+  BUBBLING_PHASE = 3
+}
+
+export interface EventPath {
+  item: EventTarget;
+  itemInShadowTree: boolean;
+  relatedTarget: EventTarget | null;
+  rootOfClosedTree: boolean;
+  slotInClosedTree: boolean;
+  target: EventTarget | null;
+  touchTargetList: EventTarget[];
+}
+
+export interface Event {
+  readonly type: string;
+  target: EventTarget | null;
+  currentTarget: EventTarget | null;
+  composedPath(): EventPath[];
+
+  eventPhase: number;
+
+  stopPropagation(): void;
+  stopImmediatePropagation(): void;
+
+  readonly bubbles: boolean;
+  readonly cancelable: boolean;
+  preventDefault(): void;
+  readonly defaultPrevented: boolean;
+  readonly composed: boolean;
+
+  isTrusted: boolean;
+  readonly timeStamp: Date;
+
+  dispatched: boolean;
+  readonly initialized: boolean;
+  inPassiveListener: boolean;
+  cancelBubble: boolean;
+  cancelBubbleImmediately: boolean;
+  path: EventPath[];
+  relatedTarget: EventTarget | null;
+}
+
+export interface CustomEvent extends Event {
+  readonly detail: any;
+  initCustomEvent(
+    type: string,
+    bubbles?: boolean,
+    cancelable?: boolean,
+    detail?: any | null
+  ): void;
+}
+
+export interface DomFile extends Blob {
+  readonly lastModified: number;
+  readonly name: string;
+}
+
+export interface DomFileConstructor {
+  new (bits: BlobPart[], filename: string, options?: FilePropertyBag): DomFile;
+  prototype: DomFile;
+}
+
+export interface FilePropertyBag extends BlobPropertyBag {
+  lastModified?: number;
+}
+
+interface ProgressEvent extends Event {
+  readonly lengthComputable: boolean;
+  readonly loaded: number;
+  readonly total: number;
+}
+
+export interface EventListenerOptions {
+  capture: boolean;
+}
+
+export interface AddEventListenerOptions extends EventListenerOptions {
+  once: boolean;
+  passive: boolean;
+}
+
+interface AbortSignal extends EventTarget {
+  readonly aborted: boolean;
+  onabort: ((this: AbortSignal, ev: ProgressEvent) => any) | null;
+  addEventListener<K extends keyof AbortSignalEventMap>(
+    type: K,
+    listener: (this: AbortSignal, ev: AbortSignalEventMap[K]) => any,
+    options?: boolean | AddEventListenerOptions
+  ): void;
+  addEventListener(
+    type: string,
+    listener: EventListener,
+    options?: boolean | AddEventListenerOptions
+  ): void;
+  removeEventListener<K extends keyof AbortSignalEventMap>(
+    type: K,
+    listener: (this: AbortSignal, ev: AbortSignalEventMap[K]) => any,
+    options?: boolean | EventListenerOptions
+  ): void;
+  removeEventListener(
+    type: string,
+    listener: EventListener,
+    options?: boolean | EventListenerOptions
+  ): void;
+}
+
+export interface ReadableStream {
+  readonly locked: boolean;
+  cancel(): Promise<void>;
+  getReader(): ReadableStreamReader;
+  tee(): [ReadableStream, ReadableStream];
+}
+
+export interface ReadableStreamReader {
+  cancel(): Promise<void>;
+  read(): Promise<any>;
+  releaseLock(): void;
+}
+
+export interface FormData extends DomIterable<string, FormDataEntryValue> {
+  append(name: string, value: string | Blob, fileName?: string): void;
+  delete(name: string): void;
+  get(name: string): FormDataEntryValue | null;
+  getAll(name: string): FormDataEntryValue[];
+  has(name: string): boolean;
+  set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+export interface FormDataConstructor {
+  new (): FormData;
+  prototype: FormData;
+}
+
+/** A blob object represents a file-like object of immutable, raw data. */
+export interface Blob {
+  /** The size, in bytes, of the data contained in the `Blob` object. */
+  readonly size: number;
+  /** A string indicating the media type of the data contained in the `Blob`.
+   * If the type is unknown, this string is empty.
+   */
+  readonly type: string;
+  /** Returns a new `Blob` object containing the data in the specified range of
+   * bytes of the source `Blob`.
+   */
+  slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+export interface Body {
+  /** A simple getter used to expose a `ReadableStream` of the body contents. */
+  readonly body: ReadableStream | null;
+  /** Stores a `Boolean` that declares whether the body has been used in a
+   * response yet.
+   */
+  readonly bodyUsed: boolean;
+  /** Takes a `Response` stream and reads it to completion. It returns a promise
+   * that resolves with an `ArrayBuffer`.
+   */
+  arrayBuffer(): Promise<ArrayBuffer>;
+  /** Takes a `Response` stream and reads it to completion. It returns a promise
+   * that resolves with a `Blob`.
+   */
+  blob(): Promise<Blob>;
+  /** Takes a `Response` stream and reads it to completion. It returns a promise
+   * that resolves with a `FormData` object.
+   */
+  formData(): Promise<FormData>;
+  /** Takes a `Response` stream and reads it to completion. It returns a promise
+   * that resolves with the result of parsing the body text as JSON.
+   */
+  json(): Promise<any>;
+  /** Takes a `Response` stream and reads it to completion. It returns a promise
+   * that resolves with a `USVString` (text).
+   */
+  text(): Promise<string>;
+}
+
+export interface Headers extends DomIterable<string, string> {
+  /** Appends a new value onto an existing header inside a `Headers` object, or
+   * adds the header if it does not already exist.
+   */
+  append(name: string, value: string): void;
+  /** Deletes a header from a `Headers` object. */
+  delete(name: string): void;
+  /** Returns an iterator allowing to go through all key/value pairs
+   * contained in this Headers object. The both the key and value of each pairs
+   * are ByteString objects.
+   */
+  entries(): IterableIterator<[string, string]>;
+  /** Returns a `ByteString` sequence of all the values of a header within a
+   * `Headers` object with a given name.
+   */
+  get(name: string): string | null;
+  /** Returns a boolean stating whether a `Headers` object contains a certain
+   * header.
+   */
+  has(name: string): boolean;
+  /** Returns an iterator allowing to go through all keys contained in
+   * this Headers object. The keys are ByteString objects.
+   */
+  keys(): IterableIterator<string>;
+  /** Sets a new value for an existing header inside a Headers object, or adds
+   * the header if it does not already exist.
+   */
+  set(name: string, value: string): void;
+  /** Returns an iterator allowing to go through all values contained in
+   * this Headers object. The values are ByteString objects.
+   */
+  values(): IterableIterator<string>;
+  forEach(
+    callbackfn: (value: string, key: string, parent: this) => void,
+    thisArg?: any
+  ): void;
+  /** The Symbol.iterator well-known symbol specifies the default
+   * iterator for this Headers object
+   */
+  [Symbol.iterator](): IterableIterator<[string, string]>;
+}
+
+export interface HeadersConstructor {
+  new (init?: HeadersInit): Headers;
+  prototype: Headers;
+}
+
+type RequestCache =
+  | "default"
+  | "no-store"
+  | "reload"
+  | "no-cache"
+  | "force-cache"
+  | "only-if-cached";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination =
+  | ""
+  | "audio"
+  | "audioworklet"
+  | "document"
+  | "embed"
+  | "font"
+  | "image"
+  | "manifest"
+  | "object"
+  | "paintworklet"
+  | "report"
+  | "script"
+  | "sharedworker"
+  | "style"
+  | "track"
+  | "video"
+  | "worker"
+  | "xslt";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type ResponseType =
+  | "basic"
+  | "cors"
+  | "default"
+  | "error"
+  | "opaque"
+  | "opaqueredirect";
+
+export interface RequestInit {
+  body?: BodyInit | null;
+  cache?: RequestCache;
+  credentials?: RequestCredentials;
+  headers?: HeadersInit;
+  integrity?: string;
+  keepalive?: boolean;
+  method?: string;
+  mode?: RequestMode;
+  redirect?: RequestRedirect;
+  referrer?: string;
+  referrerPolicy?: ReferrerPolicy;
+  signal?: AbortSignal | null;
+  window?: any;
+}
+
+export interface ResponseInit {
+  headers?: HeadersInit;
+  status?: number;
+  statusText?: string;
+}
+
+export interface RequestConstructor {
+  new (input: RequestInfo, init?: RequestInit): Request;
+  prototype: Request;
+}
+
+export interface Request extends Body {
+  /** Returns the cache mode associated with request, which is a string
+   * indicating how the the request will interact with the browser's cache when
+   * fetching.
+   */
+  readonly cache?: RequestCache;
+  /** Returns the credentials mode associated with request, which is a string
+   * indicating whether credentials will be sent with the request always, never,
+   * or only when sent to a same-origin URL.
+   */
+  readonly credentials?: RequestCredentials;
+  /** Returns the kind of resource requested by request, (e.g., `document` or
+   * `script`).
+   */
+  readonly destination?: RequestDestination;
+  /** Returns a Headers object consisting of the headers associated with
+   * request.
+   *
+   * Note that headers added in the network layer by the user agent
+   * will not be accounted for in this object, (e.g., the `Host` header).
+   */
+  readonly headers: Headers;
+  /** Returns request's subresource integrity metadata, which is a cryptographic
+   * hash of the resource being fetched. Its value consists of multiple hashes
+   * separated by whitespace. [SRI]
+   */
+  readonly integrity?: string;
+  /** Returns a boolean indicating whether or not request is for a history
+   * navigation (a.k.a. back-forward navigation).
+   */
+  readonly isHistoryNavigation?: boolean;
+  /** Returns a boolean indicating whether or not request is for a reload
+   * navigation.
+   */
+  readonly isReloadNavigation?: boolean;
+  /** Returns a boolean indicating whether or not request can outlive the global
+   * in which it was created.
+   */
+  readonly keepalive?: boolean;
+  /** Returns request's HTTP method, which is `GET` by default. */
+  readonly method: string;
+  /** Returns the mode associated with request, which is a string indicating
+   * whether the request will use CORS, or will be restricted to same-origin
+   * URLs.
+   */
+  readonly mode?: RequestMode;
+  /** Returns the redirect mode associated with request, which is a string
+   * indicating how redirects for the request will be handled during fetching.
+   *
+   * A request will follow redirects by default.
+   */
+  readonly redirect?: RequestRedirect;
+  /** Returns the referrer of request. Its value can be a same-origin URL if
+   * explicitly set in init, the empty string to indicate no referrer, and
+   * `about:client` when defaulting to the global's default.
+   *
+   * This is used during fetching to determine the value of the `Referer`
+   * header of the request being made.
+   */
+  readonly referrer?: string;
+  /** Returns the referrer policy associated with request. This is used during
+   * fetching to compute the value of the request's referrer.
+   */
+  readonly referrerPolicy?: ReferrerPolicy;
+  /** Returns the signal associated with request, which is an AbortSignal object
+   * indicating whether or not request has been aborted, and its abort event
+   * handler.
+   */
+  readonly signal?: AbortSignal;
+  /** Returns the URL of request as a string. */
+  readonly url: string;
+  clone(): Request;
+}
+
+export interface Response extends Body {
+  /** Contains the `Headers` object associated with the response. */
+  readonly headers: Headers;
+  /** Contains a boolean stating whether the response was successful (status in
+   * the range 200-299) or not.
+   */
+  readonly ok: boolean;
+  /** Indicates whether or not the response is the result of a redirect; that
+   * is, its URL list has more than one entry.
+   */
+  readonly redirected: boolean;
+  /** Contains the status code of the response (e.g., `200` for a success). */
+  readonly status: number;
+  /** Contains the status message corresponding to the status code (e.g., `OK`
+   * for `200`).
+   */
+  readonly statusText: string;
+  readonly trailer: Promise<Headers>;
+  /** Contains the type of the response (e.g., `basic`, `cors`). */
+  readonly type: ResponseType;
+  /** Contains the URL of the response. */
+  readonly url: string;
+  /** Creates a clone of a `Response` object. */
+  clone(): Response;
+}
+
+export interface Location {
+  /**
+   * Returns a DOMStringList object listing the origins of the ancestor browsing
+   * contexts, from the parent browsing context to the top-level browsing
+   * context.
+   */
+  readonly ancestorOrigins: string[];
+  /**
+   * Returns the Location object's URL's fragment (includes leading "#" if
+   * non-empty).
+   * Can be set, to navigate to the same URL with a changed fragment (ignores
+   * leading "#").
+   */
+  hash: string;
+  /**
+   * Returns the Location object's URL's host and port (if different from the
+   * default port for the scheme).  Can be set, to navigate to the same URL with
+   * a changed host and port.
+   */
+  host: string;
+  /**
+   * Returns the Location object's URL's host.  Can be set, to navigate to the
+   * same URL with a changed host.
+   */
+  hostname: string;
+  /**
+   * Returns the Location object's URL.  Can be set, to navigate to the given
+   * URL.
+   */
+  href: string;
+  /** Returns the Location object's URL's origin. */
+  readonly origin: string;
+  /**
+   * Returns the Location object's URL's path.
+   * Can be set, to navigate to the same URL with a changed path.
+   */
+  pathname: string;
+  /**
+   * Returns the Location object's URL's port.
+   * Can be set, to navigate to the same URL with a changed port.
+   */
+  port: string;
+  /**
+   * Returns the Location object's URL's scheme.
+   * Can be set, to navigate to the same URL with a changed scheme.
+   */
+  protocol: string;
+  /**
+   * Returns the Location object's URL's query (includes leading "?" if
+   * non-empty). Can be set, to navigate to the same URL with a changed query
+   * (ignores leading "?").
+   */
+  search: string;
+  /**
+   * Navigates to the given URL.
+   */
+  assign(url: string): void;
+  /**
+   * Reloads the current page.
+   */
+  reload(): void;
+  /** @deprecated */
+  reload(forcedReload: boolean): void;
+  /**
+   * Removes the current page from the session history and navigates to the
+   * given URL.
+   */
+  replace(url: string): void;
+}