feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

12 files changed, 3254 insertions, 0 deletions

diff --git a/vanilla/node_modules/whatwg-url/lib/Function.js b/vanilla/node_modules/whatwg-url/lib/Function.js
new file mode 100644
index 0000000..ea8712f
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/Function.js
@@ -0,0 +1,42 @@
+"use strict";
+
+const conversions = require("webidl-conversions");
+const utils = require("./utils.js");
+
+exports.convert = (globalObject, value, { context = "The provided value" } = {}) => {
+  if (typeof value !== "function") {
+    throw new globalObject.TypeError(context + " is not a function");
+  }
+
+  function invokeTheCallbackFunction(...args) {
+    const thisArg = utils.tryWrapperForImpl(this);
+    let callResult;
+
+    for (let i = 0; i < args.length; i++) {
+      args[i] = utils.tryWrapperForImpl(args[i]);
+    }
+
+    callResult = Reflect.apply(value, thisArg, args);
+
+    callResult = conversions["any"](callResult, { context: context, globals: globalObject });
+
+    return callResult;
+  }
+
+  invokeTheCallbackFunction.construct = (...args) => {
+    for (let i = 0; i < args.length; i++) {
+      args[i] = utils.tryWrapperForImpl(args[i]);
+    }
+
+    let callResult = Reflect.construct(value, args);
+
+    callResult = conversions["any"](callResult, { context: context, globals: globalObject });
+
+    return callResult;
+  };
+
+  invokeTheCallbackFunction[utils.wrapperSymbol] = value;
+  invokeTheCallbackFunction.objectReference = value;
+
+  return invokeTheCallbackFunction;
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/URL-impl.js b/vanilla/node_modules/whatwg-url/lib/URL-impl.js
new file mode 100644
index 0000000..06b0ddc
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/URL-impl.js
@@ -0,0 +1,233 @@
+"use strict";
+const usm = require("./url-state-machine");
+const urlencoded = require("./urlencoded");
+const URLSearchParams = require("./URLSearchParams");
+
+exports.implementation = class URLImpl {
+  // Unlike the spec, we duplicate some code between the constructor and canParse, because we want to give useful error
+  // messages in the constructor that distinguish between the different causes of failure.
+  constructor(globalObject, [url, base]) {
+    let parsedBase = null;
+    if (base !== undefined) {
+      parsedBase = usm.basicURLParse(base);
+      if (parsedBase === null) {
+        throw new TypeError(`Invalid base URL: ${base}`);
+      }
+    }
+
+    const parsedURL = usm.basicURLParse(url, { baseURL: parsedBase });
+    if (parsedURL === null) {
+      throw new TypeError(`Invalid URL: ${url}`);
+    }
+
+    const query = parsedURL.query !== null ? parsedURL.query : "";
+
+    this._url = parsedURL;
+
+    // We cannot invoke the "new URLSearchParams object" algorithm without going through the constructor, which strips
+    // question mark by default. Therefore the doNotStripQMark hack is used.
+    this._query = URLSearchParams.createImpl(globalObject, [query], { doNotStripQMark: true });
+    this._query._url = this;
+  }
+
+  static parse(globalObject, input, base) {
+    try {
+      return new URLImpl(globalObject, [input, base]);
+    } catch {
+      return null;
+    }
+  }
+
+  static canParse(url, base) {
+    let parsedBase = null;
+    if (base !== undefined) {
+      parsedBase = usm.basicURLParse(base);
+      if (parsedBase === null) {
+        return false;
+      }
+    }
+
+    const parsedURL = usm.basicURLParse(url, { baseURL: parsedBase });
+    if (parsedURL === null) {
+      return false;
+    }
+
+    return true;
+  }
+
+  get href() {
+    return usm.serializeURL(this._url);
+  }
+
+  set href(v) {
+    const parsedURL = usm.basicURLParse(v);
+    if (parsedURL === null) {
+      throw new TypeError(`Invalid URL: ${v}`);
+    }
+
+    this._url = parsedURL;
+
+    this._query._list.splice(0);
+    const { query } = parsedURL;
+    if (query !== null) {
+      this._query._list = urlencoded.parseUrlencodedString(query);
+    }
+  }
+
+  get origin() {
+    return usm.serializeURLOrigin(this._url);
+  }
+
+  get protocol() {
+    return `${this._url.scheme}:`;
+  }
+
+  set protocol(v) {
+    usm.basicURLParse(`${v}:`, { url: this._url, stateOverride: "scheme start" });
+  }
+
+  get username() {
+    return this._url.username;
+  }
+
+  set username(v) {
+    if (usm.cannotHaveAUsernamePasswordPort(this._url)) {
+      return;
+    }
+
+    usm.setTheUsername(this._url, v);
+  }
+
+  get password() {
+    return this._url.password;
+  }
+
+  set password(v) {
+    if (usm.cannotHaveAUsernamePasswordPort(this._url)) {
+      return;
+    }
+
+    usm.setThePassword(this._url, v);
+  }
+
+  get host() {
+    const url = this._url;
+
+    if (url.host === null) {
+      return "";
+    }
+
+    if (url.port === null) {
+      return usm.serializeHost(url.host);
+    }
+
+    return `${usm.serializeHost(url.host)}:${usm.serializeInteger(url.port)}`;
+  }
+
+  set host(v) {
+    if (usm.hasAnOpaquePath(this._url)) {
+      return;
+    }
+
+    usm.basicURLParse(v, { url: this._url, stateOverride: "host" });
+  }
+
+  get hostname() {
+    if (this._url.host === null) {
+      return "";
+    }
+
+    return usm.serializeHost(this._url.host);
+  }
+
+  set hostname(v) {
+    if (usm.hasAnOpaquePath(this._url)) {
+      return;
+    }
+
+    usm.basicURLParse(v, { url: this._url, stateOverride: "hostname" });
+  }
+
+  get port() {
+    if (this._url.port === null) {
+      return "";
+    }
+
+    return usm.serializeInteger(this._url.port);
+  }
+
+  set port(v) {
+    if (usm.cannotHaveAUsernamePasswordPort(this._url)) {
+      return;
+    }
+
+    if (v === "") {
+      this._url.port = null;
+    } else {
+      usm.basicURLParse(v, { url: this._url, stateOverride: "port" });
+    }
+  }
+
+  get pathname() {
+    return usm.serializePath(this._url);
+  }
+
+  set pathname(v) {
+    if (usm.hasAnOpaquePath(this._url)) {
+      return;
+    }
+
+    this._url.path = [];
+    usm.basicURLParse(v, { url: this._url, stateOverride: "path start" });
+  }
+
+  get search() {
+    if (this._url.query === null || this._url.query === "") {
+      return "";
+    }
+
+    return `?${this._url.query}`;
+  }
+
+  set search(v) {
+    const url = this._url;
+
+    if (v === "") {
+      url.query = null;
+      this._query._list = [];
+      return;
+    }
+
+    const input = v[0] === "?" ? v.substring(1) : v;
+    url.query = "";
+    usm.basicURLParse(input, { url, stateOverride: "query" });
+    this._query._list = urlencoded.parseUrlencodedString(input);
+  }
+
+  get searchParams() {
+    return this._query;
+  }
+
+  get hash() {
+    if (this._url.fragment === null || this._url.fragment === "") {
+      return "";
+    }
+
+    return `#${this._url.fragment}`;
+  }
+
+  set hash(v) {
+    if (v === "") {
+      this._url.fragment = null;
+      return;
+    }
+
+    const input = v[0] === "#" ? v.substring(1) : v;
+    this._url.fragment = "";
+    usm.basicURLParse(input, { url: this._url, stateOverride: "fragment" });
+  }
+
+  toJSON() {
+    return this.href;
+  }
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/URL.js b/vanilla/node_modules/whatwg-url/lib/URL.js
new file mode 100644
index 0000000..0d80319
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/URL.js
@@ -0,0 +1,499 @@
+"use strict";
+
+const conversions = require("webidl-conversions");
+const utils = require("./utils.js");
+
+const implSymbol = utils.implSymbol;
+const ctorRegistrySymbol = utils.ctorRegistrySymbol;
+
+const interfaceName = "URL";
+
+exports.is = value => {
+  return utils.isObject(value) && Object.hasOwn(value, implSymbol) && value[implSymbol] instanceof Impl.implementation;
+};
+exports.isImpl = value => {
+  return utils.isObject(value) && value instanceof Impl.implementation;
+};
+exports.convert = (globalObject, value, { context = "The provided value" } = {}) => {
+  if (exports.is(value)) {
+    return utils.implForWrapper(value);
+  }
+  throw new globalObject.TypeError(`${context} is not of type 'URL'.`);
+};
+
+function makeWrapper(globalObject, newTarget) {
+  let proto;
+  if (newTarget !== undefined) {
+    proto = newTarget.prototype;
+  }
+
+  if (!utils.isObject(proto)) {
+    proto = globalObject[ctorRegistrySymbol]["URL"].prototype;
+  }
+
+  return Object.create(proto);
+}
+
+exports.create = (globalObject, constructorArgs, privateData) => {
+  const wrapper = makeWrapper(globalObject);
+  return exports.setup(wrapper, globalObject, constructorArgs, privateData);
+};
+
+exports.createImpl = (globalObject, constructorArgs, privateData) => {
+  const wrapper = exports.create(globalObject, constructorArgs, privateData);
+  return utils.implForWrapper(wrapper);
+};
+
+exports._internalSetup = (wrapper, globalObject) => {};
+
+exports.setup = (wrapper, globalObject, constructorArgs = [], privateData = {}) => {
+  privateData.wrapper = wrapper;
+
+  exports._internalSetup(wrapper, globalObject);
+  Object.defineProperty(wrapper, implSymbol, {
+    value: new Impl.implementation(globalObject, constructorArgs, privateData),
+    configurable: true
+  });
+
+  wrapper[implSymbol][utils.wrapperSymbol] = wrapper;
+  if (Impl.init) {
+    Impl.init(wrapper[implSymbol]);
+  }
+  return wrapper;
+};
+
+exports.new = (globalObject, newTarget) => {
+  const wrapper = makeWrapper(globalObject, newTarget);
+
+  exports._internalSetup(wrapper, globalObject);
+  Object.defineProperty(wrapper, implSymbol, {
+    value: Object.create(Impl.implementation.prototype),
+    configurable: true
+  });
+
+  wrapper[implSymbol][utils.wrapperSymbol] = wrapper;
+  if (Impl.init) {
+    Impl.init(wrapper[implSymbol]);
+  }
+  return wrapper[implSymbol];
+};
+
+const exposed = new Set(["Window", "Worker"]);
+
+exports.install = (globalObject, globalNames) => {
+  if (!globalNames.some(globalName => exposed.has(globalName))) {
+    return;
+  }
+
+  const ctorRegistry = utils.initCtorRegistry(globalObject);
+  class URL {
+    constructor(url) {
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to construct 'URL': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to construct 'URL': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        if (curArg !== undefined) {
+          curArg = conversions["USVString"](curArg, {
+            context: "Failed to construct 'URL': parameter 2",
+            globals: globalObject
+          });
+        }
+        args.push(curArg);
+      }
+      return exports.setup(Object.create(new.target.prototype), globalObject, args);
+    }
+
+    toJSON() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'toJSON' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol].toJSON();
+    }
+
+    get href() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get href' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["href"];
+    }
+
+    set href(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set href' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'href' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["href"] = V;
+    }
+
+    toString() {
+      const esValue = this;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'toString' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["href"];
+    }
+
+    get origin() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get origin' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["origin"];
+    }
+
+    get protocol() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get protocol' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["protocol"];
+    }
+
+    set protocol(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set protocol' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'protocol' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["protocol"] = V;
+    }
+
+    get username() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get username' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["username"];
+    }
+
+    set username(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set username' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'username' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["username"] = V;
+    }
+
+    get password() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get password' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["password"];
+    }
+
+    set password(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set password' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'password' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["password"] = V;
+    }
+
+    get host() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get host' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["host"];
+    }
+
+    set host(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set host' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'host' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["host"] = V;
+    }
+
+    get hostname() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get hostname' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["hostname"];
+    }
+
+    set hostname(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set hostname' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'hostname' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["hostname"] = V;
+    }
+
+    get port() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get port' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["port"];
+    }
+
+    set port(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set port' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'port' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["port"] = V;
+    }
+
+    get pathname() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get pathname' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["pathname"];
+    }
+
+    set pathname(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set pathname' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'pathname' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["pathname"] = V;
+    }
+
+    get search() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get search' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["search"];
+    }
+
+    set search(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set search' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'search' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["search"] = V;
+    }
+
+    get searchParams() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get searchParams' called on an object that is not a valid instance of URL.");
+      }
+
+      return utils.getSameObject(this, "searchParams", () => {
+        return utils.tryWrapperForImpl(esValue[implSymbol]["searchParams"]);
+      });
+    }
+
+    get hash() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get hash' called on an object that is not a valid instance of URL.");
+      }
+
+      return esValue[implSymbol]["hash"];
+    }
+
+    set hash(V) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set hash' called on an object that is not a valid instance of URL.");
+      }
+
+      V = conversions["USVString"](V, {
+        context: "Failed to set the 'hash' property on 'URL': The provided value",
+        globals: globalObject
+      });
+
+      esValue[implSymbol]["hash"] = V;
+    }
+
+    static parse(url) {
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'parse' on 'URL': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'parse' on 'URL': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        if (curArg !== undefined) {
+          curArg = conversions["USVString"](curArg, {
+            context: "Failed to execute 'parse' on 'URL': parameter 2",
+            globals: globalObject
+          });
+        }
+        args.push(curArg);
+      }
+      return utils.tryWrapperForImpl(Impl.implementation.parse(globalObject, ...args));
+    }
+
+    static canParse(url) {
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'canParse' on 'URL': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'canParse' on 'URL': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        if (curArg !== undefined) {
+          curArg = conversions["USVString"](curArg, {
+            context: "Failed to execute 'canParse' on 'URL': parameter 2",
+            globals: globalObject
+          });
+        }
+        args.push(curArg);
+      }
+      return Impl.implementation.canParse(...args);
+    }
+  }
+  Object.defineProperties(URL.prototype, {
+    toJSON: { enumerable: true },
+    href: { enumerable: true },
+    toString: { enumerable: true },
+    origin: { enumerable: true },
+    protocol: { enumerable: true },
+    username: { enumerable: true },
+    password: { enumerable: true },
+    host: { enumerable: true },
+    hostname: { enumerable: true },
+    port: { enumerable: true },
+    pathname: { enumerable: true },
+    search: { enumerable: true },
+    searchParams: { enumerable: true },
+    hash: { enumerable: true },
+    [Symbol.toStringTag]: { value: "URL", configurable: true }
+  });
+  Object.defineProperties(URL, { parse: { enumerable: true }, canParse: { enumerable: true } });
+  ctorRegistry[interfaceName] = URL;
+
+  Object.defineProperty(globalObject, interfaceName, {
+    configurable: true,
+    writable: true,
+    value: URL
+  });
+
+  if (globalNames.includes("Window")) {
+    Object.defineProperty(globalObject, "webkitURL", {
+      configurable: true,
+      writable: true,
+      value: URL
+    });
+  }
+};
+
+const Impl = require("./URL-impl.js");
diff --git a/vanilla/node_modules/whatwg-url/lib/URLSearchParams-impl.js b/vanilla/node_modules/whatwg-url/lib/URLSearchParams-impl.js
new file mode 100644
index 0000000..d929591
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/URLSearchParams-impl.js
@@ -0,0 +1,135 @@
+"use strict";
+const urlencoded = require("./urlencoded");
+
+exports.implementation = class URLSearchParamsImpl {
+  constructor(globalObject, constructorArgs, { doNotStripQMark = false }) {
+    let init = constructorArgs[0];
+    this._list = [];
+    this._url = null;
+
+    if (!doNotStripQMark && typeof init === "string" && init[0] === "?") {
+      init = init.slice(1);
+    }
+
+    if (Array.isArray(init)) {
+      for (const pair of init) {
+        if (pair.length !== 2) {
+          throw new TypeError("Failed to construct 'URLSearchParams': parameter 1 sequence's element does not " +
+                              "contain exactly two elements.");
+        }
+        this._list.push([pair[0], pair[1]]);
+      }
+    } else if (typeof init === "object" && Object.getPrototypeOf(init) === null) {
+      for (const name of Object.keys(init)) {
+        const value = init[name];
+        this._list.push([name, value]);
+      }
+    } else {
+      this._list = urlencoded.parseUrlencodedString(init);
+    }
+  }
+
+  _updateSteps() {
+    if (this._url !== null) {
+      let serializedQuery = urlencoded.serializeUrlencoded(this._list);
+      if (serializedQuery === "") {
+        serializedQuery = null;
+      }
+
+      this._url._url.query = serializedQuery;
+    }
+  }
+
+  get size() {
+    return this._list.length;
+  }
+
+  append(name, value) {
+    this._list.push([name, value]);
+    this._updateSteps();
+  }
+
+  delete(name, value) {
+    let i = 0;
+    while (i < this._list.length) {
+      if (this._list[i][0] === name && (value === undefined || this._list[i][1] === value)) {
+        this._list.splice(i, 1);
+      } else {
+        i++;
+      }
+    }
+    this._updateSteps();
+  }
+
+  get(name) {
+    for (const tuple of this._list) {
+      if (tuple[0] === name) {
+        return tuple[1];
+      }
+    }
+    return null;
+  }
+
+  getAll(name) {
+    const output = [];
+    for (const tuple of this._list) {
+      if (tuple[0] === name) {
+        output.push(tuple[1]);
+      }
+    }
+    return output;
+  }
+
+  has(name, value) {
+    for (const tuple of this._list) {
+      if (tuple[0] === name && (value === undefined || tuple[1] === value)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  set(name, value) {
+    let found = false;
+    let i = 0;
+    while (i < this._list.length) {
+      if (this._list[i][0] === name) {
+        if (found) {
+          this._list.splice(i, 1);
+        } else {
+          found = true;
+          this._list[i][1] = value;
+          i++;
+        }
+      } else {
+        i++;
+      }
+    }
+    if (!found) {
+      this._list.push([name, value]);
+    }
+    this._updateSteps();
+  }
+
+  sort() {
+    this._list.sort((a, b) => {
+      if (a[0] < b[0]) {
+        return -1;
+      }
+      if (a[0] > b[0]) {
+        return 1;
+      }
+      return 0;
+    });
+
+    this._updateSteps();
+  }
+
+  [Symbol.iterator]() {
+    return this._list[Symbol.iterator]();
+  }
+
+  toString() {
+    return urlencoded.serializeUrlencoded(this._list);
+  }
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/URLSearchParams.js b/vanilla/node_modules/whatwg-url/lib/URLSearchParams.js
new file mode 100644
index 0000000..bc3c457
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/URLSearchParams.js
@@ -0,0 +1,505 @@
+"use strict";
+
+const conversions = require("webidl-conversions");
+const utils = require("./utils.js");
+
+const Function = require("./Function.js");
+const newObjectInRealm = utils.newObjectInRealm;
+const implSymbol = utils.implSymbol;
+const ctorRegistrySymbol = utils.ctorRegistrySymbol;
+
+const interfaceName = "URLSearchParams";
+
+exports.is = value => {
+  return utils.isObject(value) && Object.hasOwn(value, implSymbol) && value[implSymbol] instanceof Impl.implementation;
+};
+exports.isImpl = value => {
+  return utils.isObject(value) && value instanceof Impl.implementation;
+};
+exports.convert = (globalObject, value, { context = "The provided value" } = {}) => {
+  if (exports.is(value)) {
+    return utils.implForWrapper(value);
+  }
+  throw new globalObject.TypeError(`${context} is not of type 'URLSearchParams'.`);
+};
+
+exports.createDefaultIterator = (globalObject, target, kind) => {
+  const ctorRegistry = globalObject[ctorRegistrySymbol];
+  const iteratorPrototype = ctorRegistry["URLSearchParams Iterator"];
+  const iterator = Object.create(iteratorPrototype);
+  Object.defineProperty(iterator, utils.iterInternalSymbol, {
+    value: { target, kind, index: 0 },
+    configurable: true
+  });
+  return iterator;
+};
+
+function makeWrapper(globalObject, newTarget) {
+  let proto;
+  if (newTarget !== undefined) {
+    proto = newTarget.prototype;
+  }
+
+  if (!utils.isObject(proto)) {
+    proto = globalObject[ctorRegistrySymbol]["URLSearchParams"].prototype;
+  }
+
+  return Object.create(proto);
+}
+
+exports.create = (globalObject, constructorArgs, privateData) => {
+  const wrapper = makeWrapper(globalObject);
+  return exports.setup(wrapper, globalObject, constructorArgs, privateData);
+};
+
+exports.createImpl = (globalObject, constructorArgs, privateData) => {
+  const wrapper = exports.create(globalObject, constructorArgs, privateData);
+  return utils.implForWrapper(wrapper);
+};
+
+exports._internalSetup = (wrapper, globalObject) => {};
+
+exports.setup = (wrapper, globalObject, constructorArgs = [], privateData = {}) => {
+  privateData.wrapper = wrapper;
+
+  exports._internalSetup(wrapper, globalObject);
+  Object.defineProperty(wrapper, implSymbol, {
+    value: new Impl.implementation(globalObject, constructorArgs, privateData),
+    configurable: true
+  });
+
+  wrapper[implSymbol][utils.wrapperSymbol] = wrapper;
+  if (Impl.init) {
+    Impl.init(wrapper[implSymbol]);
+  }
+  return wrapper;
+};
+
+exports.new = (globalObject, newTarget) => {
+  const wrapper = makeWrapper(globalObject, newTarget);
+
+  exports._internalSetup(wrapper, globalObject);
+  Object.defineProperty(wrapper, implSymbol, {
+    value: Object.create(Impl.implementation.prototype),
+    configurable: true
+  });
+
+  wrapper[implSymbol][utils.wrapperSymbol] = wrapper;
+  if (Impl.init) {
+    Impl.init(wrapper[implSymbol]);
+  }
+  return wrapper[implSymbol];
+};
+
+const exposed = new Set(["Window", "Worker"]);
+
+exports.install = (globalObject, globalNames) => {
+  if (!globalNames.some(globalName => exposed.has(globalName))) {
+    return;
+  }
+
+  const ctorRegistry = utils.initCtorRegistry(globalObject);
+  class URLSearchParams {
+    constructor() {
+      const args = [];
+      {
+        let curArg = arguments[0];
+        if (curArg !== undefined) {
+          if (utils.isObject(curArg)) {
+            if (curArg[Symbol.iterator] !== undefined) {
+              if (!utils.isObject(curArg)) {
+                throw new globalObject.TypeError(
+                  "Failed to construct 'URLSearchParams': parameter 1" + " sequence" + " is not an iterable object."
+                );
+              } else {
+                const V = [];
+                const tmp = curArg;
+                for (let nextItem of tmp) {
+                  if (!utils.isObject(nextItem)) {
+                    throw new globalObject.TypeError(
+                      "Failed to construct 'URLSearchParams': parameter 1" +
+                        " sequence" +
+                        "'s element" +
+                        " is not an iterable object."
+                    );
+                  } else {
+                    const V = [];
+                    const tmp = nextItem;
+                    for (let nextItem of tmp) {
+                      nextItem = conversions["USVString"](nextItem, {
+                        context:
+                          "Failed to construct 'URLSearchParams': parameter 1" +
+                          " sequence" +
+                          "'s element" +
+                          "'s element",
+                        globals: globalObject
+                      });
+
+                      V.push(nextItem);
+                    }
+                    nextItem = V;
+                  }
+
+                  V.push(nextItem);
+                }
+                curArg = V;
+              }
+            } else {
+              if (!utils.isObject(curArg)) {
+                throw new globalObject.TypeError(
+                  "Failed to construct 'URLSearchParams': parameter 1" + " record" + " is not an object."
+                );
+              } else {
+                const result = Object.create(null);
+                for (const key of Reflect.ownKeys(curArg)) {
+                  const desc = Object.getOwnPropertyDescriptor(curArg, key);
+                  if (desc && desc.enumerable) {
+                    let typedKey = key;
+
+                    typedKey = conversions["USVString"](typedKey, {
+                      context: "Failed to construct 'URLSearchParams': parameter 1" + " record" + "'s key",
+                      globals: globalObject
+                    });
+
+                    let typedValue = curArg[key];
+
+                    typedValue = conversions["USVString"](typedValue, {
+                      context: "Failed to construct 'URLSearchParams': parameter 1" + " record" + "'s value",
+                      globals: globalObject
+                    });
+
+                    result[typedKey] = typedValue;
+                  }
+                }
+                curArg = result;
+              }
+            }
+          } else {
+            curArg = conversions["USVString"](curArg, {
+              context: "Failed to construct 'URLSearchParams': parameter 1",
+              globals: globalObject
+            });
+          }
+        } else {
+          curArg = "";
+        }
+        args.push(curArg);
+      }
+      return exports.setup(Object.create(new.target.prototype), globalObject, args);
+    }
+
+    append(name, value) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError(
+          "'append' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+
+      if (arguments.length < 2) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'append' on 'URLSearchParams': 2 arguments required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'append' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'append' on 'URLSearchParams': parameter 2",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      return utils.tryWrapperForImpl(esValue[implSymbol].append(...args));
+    }
+
+    delete(name) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError(
+          "'delete' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'delete' on 'URLSearchParams': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'delete' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        if (curArg !== undefined) {
+          curArg = conversions["USVString"](curArg, {
+            context: "Failed to execute 'delete' on 'URLSearchParams': parameter 2",
+            globals: globalObject
+          });
+        }
+        args.push(curArg);
+      }
+      return utils.tryWrapperForImpl(esValue[implSymbol].delete(...args));
+    }
+
+    get(name) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'get' called on an object that is not a valid instance of URLSearchParams.");
+      }
+
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'get' on 'URLSearchParams': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'get' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      return esValue[implSymbol].get(...args);
+    }
+
+    getAll(name) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError(
+          "'getAll' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'getAll' on 'URLSearchParams': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'getAll' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      return utils.tryWrapperForImpl(esValue[implSymbol].getAll(...args));
+    }
+
+    has(name) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'has' called on an object that is not a valid instance of URLSearchParams.");
+      }
+
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'has' on 'URLSearchParams': 1 argument required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'has' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        if (curArg !== undefined) {
+          curArg = conversions["USVString"](curArg, {
+            context: "Failed to execute 'has' on 'URLSearchParams': parameter 2",
+            globals: globalObject
+          });
+        }
+        args.push(curArg);
+      }
+      return esValue[implSymbol].has(...args);
+    }
+
+    set(name, value) {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'set' called on an object that is not a valid instance of URLSearchParams.");
+      }
+
+      if (arguments.length < 2) {
+        throw new globalObject.TypeError(
+          `Failed to execute 'set' on 'URLSearchParams': 2 arguments required, but only ${arguments.length} present.`
+        );
+      }
+      const args = [];
+      {
+        let curArg = arguments[0];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'set' on 'URLSearchParams': parameter 1",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      {
+        let curArg = arguments[1];
+        curArg = conversions["USVString"](curArg, {
+          context: "Failed to execute 'set' on 'URLSearchParams': parameter 2",
+          globals: globalObject
+        });
+        args.push(curArg);
+      }
+      return utils.tryWrapperForImpl(esValue[implSymbol].set(...args));
+    }
+
+    sort() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError("'sort' called on an object that is not a valid instance of URLSearchParams.");
+      }
+
+      return utils.tryWrapperForImpl(esValue[implSymbol].sort());
+    }
+
+    toString() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError(
+          "'toString' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+
+      return esValue[implSymbol].toString();
+    }
+
+    keys() {
+      if (!exports.is(this)) {
+        throw new globalObject.TypeError("'keys' called on an object that is not a valid instance of URLSearchParams.");
+      }
+      return exports.createDefaultIterator(globalObject, this, "key");
+    }
+
+    values() {
+      if (!exports.is(this)) {
+        throw new globalObject.TypeError(
+          "'values' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+      return exports.createDefaultIterator(globalObject, this, "value");
+    }
+
+    entries() {
+      if (!exports.is(this)) {
+        throw new globalObject.TypeError(
+          "'entries' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+      return exports.createDefaultIterator(globalObject, this, "key+value");
+    }
+
+    forEach(callback) {
+      if (!exports.is(this)) {
+        throw new globalObject.TypeError(
+          "'forEach' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+      if (arguments.length < 1) {
+        throw new globalObject.TypeError(
+          "Failed to execute 'forEach' on 'iterable': 1 argument required, but only 0 present."
+        );
+      }
+      callback = Function.convert(globalObject, callback, {
+        context: "Failed to execute 'forEach' on 'iterable': The callback provided as parameter 1"
+      });
+      const thisArg = arguments[1];
+      let pairs = Array.from(this[implSymbol]);
+      let i = 0;
+      while (i < pairs.length) {
+        const [key, value] = pairs[i].map(utils.tryWrapperForImpl);
+        callback.call(thisArg, value, key, this);
+        pairs = Array.from(this[implSymbol]);
+        i++;
+      }
+    }
+
+    get size() {
+      const esValue = this !== null && this !== undefined ? this : globalObject;
+
+      if (!exports.is(esValue)) {
+        throw new globalObject.TypeError(
+          "'get size' called on an object that is not a valid instance of URLSearchParams."
+        );
+      }
+
+      return esValue[implSymbol]["size"];
+    }
+  }
+  Object.defineProperties(URLSearchParams.prototype, {
+    append: { enumerable: true },
+    delete: { enumerable: true },
+    get: { enumerable: true },
+    getAll: { enumerable: true },
+    has: { enumerable: true },
+    set: { enumerable: true },
+    sort: { enumerable: true },
+    toString: { enumerable: true },
+    keys: { enumerable: true },
+    values: { enumerable: true },
+    entries: { enumerable: true },
+    forEach: { enumerable: true },
+    size: { enumerable: true },
+    [Symbol.toStringTag]: { value: "URLSearchParams", configurable: true },
+    [Symbol.iterator]: { value: URLSearchParams.prototype.entries, configurable: true, writable: true }
+  });
+  ctorRegistry[interfaceName] = URLSearchParams;
+
+  ctorRegistry["URLSearchParams Iterator"] = Object.create(ctorRegistry["%IteratorPrototype%"], {
+    [Symbol.toStringTag]: {
+      configurable: true,
+      value: "URLSearchParams Iterator"
+    }
+  });
+  utils.define(ctorRegistry["URLSearchParams Iterator"], {
+    next() {
+      const internal = this && this[utils.iterInternalSymbol];
+      if (!internal) {
+        throw new globalObject.TypeError("next() called on a value that is not a URLSearchParams iterator object");
+      }
+
+      const { target, kind, index } = internal;
+      const values = Array.from(target[implSymbol]);
+      const len = values.length;
+      if (index >= len) {
+        return newObjectInRealm(globalObject, { value: undefined, done: true });
+      }
+
+      const pair = values[index];
+      internal.index = index + 1;
+      return newObjectInRealm(globalObject, utils.iteratorResult(pair.map(utils.tryWrapperForImpl), kind));
+    }
+  });
+
+  Object.defineProperty(globalObject, interfaceName, {
+    configurable: true,
+    writable: true,
+    value: URLSearchParams
+  });
+};
+
+const Impl = require("./URLSearchParams-impl.js");
diff --git a/vanilla/node_modules/whatwg-url/lib/VoidFunction.js b/vanilla/node_modules/whatwg-url/lib/VoidFunction.js
new file mode 100644
index 0000000..9a00672
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/VoidFunction.js
@@ -0,0 +1,26 @@
+"use strict";
+
+const conversions = require("webidl-conversions");
+const utils = require("./utils.js");
+
+exports.convert = (globalObject, value, { context = "The provided value" } = {}) => {
+  if (typeof value !== "function") {
+    throw new globalObject.TypeError(context + " is not a function");
+  }
+
+  function invokeTheCallbackFunction() {
+    const thisArg = utils.tryWrapperForImpl(this);
+    let callResult;
+
+    callResult = Reflect.apply(value, thisArg, []);
+  }
+
+  invokeTheCallbackFunction.construct = () => {
+    let callResult = Reflect.construct(value, []);
+  };
+
+  invokeTheCallbackFunction[utils.wrapperSymbol] = value;
+  invokeTheCallbackFunction.objectReference = value;
+
+  return invokeTheCallbackFunction;
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/encoding.js b/vanilla/node_modules/whatwg-url/lib/encoding.js
new file mode 100644
index 0000000..cb66b8f
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/encoding.js
@@ -0,0 +1,16 @@
+"use strict";
+const utf8Encoder = new TextEncoder();
+const utf8Decoder = new TextDecoder("utf-8", { ignoreBOM: true });
+
+function utf8Encode(string) {
+  return utf8Encoder.encode(string);
+}
+
+function utf8DecodeWithoutBOM(bytes) {
+  return utf8Decoder.decode(bytes);
+}
+
+module.exports = {
+  utf8Encode,
+  utf8DecodeWithoutBOM
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/infra.js b/vanilla/node_modules/whatwg-url/lib/infra.js
new file mode 100644
index 0000000..4a984a3
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/infra.js
@@ -0,0 +1,26 @@
+"use strict";
+
+// Note that we take code points as JS numbers, not JS strings.
+
+function isASCIIDigit(c) {
+  return c >= 0x30 && c <= 0x39;
+}
+
+function isASCIIAlpha(c) {
+  return (c >= 0x41 && c <= 0x5A) || (c >= 0x61 && c <= 0x7A);
+}
+
+function isASCIIAlphanumeric(c) {
+  return isASCIIAlpha(c) || isASCIIDigit(c);
+}
+
+function isASCIIHex(c) {
+  return isASCIIDigit(c) || (c >= 0x41 && c <= 0x46) || (c >= 0x61 && c <= 0x66);
+}
+
+module.exports = {
+  isASCIIDigit,
+  isASCIIAlpha,
+  isASCIIAlphanumeric,
+  isASCIIHex
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/percent-encoding.js b/vanilla/node_modules/whatwg-url/lib/percent-encoding.js
new file mode 100644
index 0000000..c4c86ec
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/percent-encoding.js
@@ -0,0 +1,147 @@
+"use strict";
+const { isASCIIHex } = require("./infra");
+const { utf8Encode } = require("./encoding");
+
+function p(char) {
+  return char.codePointAt(0);
+}
+
+// https://url.spec.whatwg.org/#percent-encode
+function percentEncode(c) {
+  let hex = c.toString(16).toUpperCase();
+  if (hex.length === 1) {
+    hex = `0${hex}`;
+  }
+
+  return `%${hex}`;
+}
+
+// https://url.spec.whatwg.org/#percent-decode
+function percentDecodeBytes(input) {
+  const output = new Uint8Array(input.byteLength);
+  let outputIndex = 0;
+  for (let i = 0; i < input.byteLength; ++i) {
+    const byte = input[i];
+    if (byte !== 0x25) {
+      output[outputIndex++] = byte;
+    } else if (byte === 0x25 && (!isASCIIHex(input[i + 1]) || !isASCIIHex(input[i + 2]))) {
+      output[outputIndex++] = byte;
+    } else {
+      const bytePoint = parseInt(String.fromCodePoint(input[i + 1], input[i + 2]), 16);
+      output[outputIndex++] = bytePoint;
+      i += 2;
+    }
+  }
+
+  return output.slice(0, outputIndex);
+}
+
+// https://url.spec.whatwg.org/#string-percent-decode
+function percentDecodeString(input) {
+  const bytes = utf8Encode(input);
+  return percentDecodeBytes(bytes);
+}
+
+// https://url.spec.whatwg.org/#c0-control-percent-encode-set
+function isC0ControlPercentEncode(c) {
+  return c <= 0x1F || c > 0x7E;
+}
+
+// https://url.spec.whatwg.org/#fragment-percent-encode-set
+const extraFragmentPercentEncodeSet = new Set([p(" "), p("\""), p("<"), p(">"), p("`")]);
+function isFragmentPercentEncode(c) {
+  return isC0ControlPercentEncode(c) || extraFragmentPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#query-percent-encode-set
+const extraQueryPercentEncodeSet = new Set([p(" "), p("\""), p("#"), p("<"), p(">")]);
+const extraQueryPercentEncodeChars = String.fromCodePoint(...[...extraQueryPercentEncodeSet].sort());
+function isQueryPercentEncode(c) {
+  return isC0ControlPercentEncode(c) || extraQueryPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#special-query-percent-encode-set
+const extraSpecialQueryPercentEncodeSet = new Set([...extraQueryPercentEncodeSet, p("'")]);
+const extraSpecialQueryPercentEncodeChars = String.fromCodePoint(...[...extraSpecialQueryPercentEncodeSet].sort());
+function isSpecialQueryPercentEncode(c) {
+  return isC0ControlPercentEncode(c) || extraSpecialQueryPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#path-percent-encode-set
+const extraPathPercentEncodeSet = new Set([p("?"), p("`"), p("{"), p("}"), p("^")]);
+function isPathPercentEncode(c) {
+  return isQueryPercentEncode(c) || extraPathPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#userinfo-percent-encode-set
+const extraUserinfoPercentEncodeSet =
+  new Set([p("/"), p(":"), p(";"), p("="), p("@"), p("["), p("\\"), p("]"), p("|")]);
+function isUserinfoPercentEncode(c) {
+  return isPathPercentEncode(c) || extraUserinfoPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#component-percent-encode-set
+const extraComponentPercentEncodeSet = new Set([p("$"), p("%"), p("&"), p("+"), p(",")]);
+function isComponentPercentEncode(c) {
+  return isUserinfoPercentEncode(c) || extraComponentPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#application-x-www-form-urlencoded-percent-encode-set
+const extraURLEncodedPercentEncodeSet = new Set([p("!"), p("'"), p("("), p(")"), p("~")]);
+function isURLEncodedPercentEncode(c) {
+  return isComponentPercentEncode(c) || extraURLEncodedPercentEncodeSet.has(c);
+}
+
+// https://url.spec.whatwg.org/#code-point-percent-encode-after-encoding
+// https://url.spec.whatwg.org/#utf-8-percent-encode
+// Assuming encoding is always utf-8 allows us to trim one of the logic branches. TODO: support encoding.
+// The "-Internal" variant here has code points as JS strings. The external version used by other files has code points
+// as JS numbers, like the rest of the codebase.
+function utf8PercentEncodeCodePointInternal(codePoint, percentEncodePredicate) {
+  const bytes = utf8Encode(codePoint);
+  let output = "";
+  for (const byte of bytes) {
+    // Our percentEncodePredicate operates on bytes, not code points, so this is slightly different from the spec.
+    if (!percentEncodePredicate(byte)) {
+      output += String.fromCharCode(byte);
+    } else {
+      output += percentEncode(byte);
+    }
+  }
+
+  return output;
+}
+
+function utf8PercentEncodeCodePoint(codePoint, percentEncodePredicate) {
+  return utf8PercentEncodeCodePointInternal(String.fromCodePoint(codePoint), percentEncodePredicate);
+}
+
+// https://url.spec.whatwg.org/#string-percent-encode-after-encoding
+// https://url.spec.whatwg.org/#string-utf-8-percent-encode
+function utf8PercentEncodeString(input, percentEncodePredicate, spaceAsPlus = false) {
+  let output = "";
+  for (const codePoint of input) {
+    if (spaceAsPlus && codePoint === " ") {
+      output += "+";
+    } else {
+      output += utf8PercentEncodeCodePointInternal(codePoint, percentEncodePredicate);
+    }
+  }
+  return output;
+}
+
+module.exports = {
+  isC0ControlPercentEncode,
+  isFragmentPercentEncode,
+  isQueryPercentEncode,
+  isSpecialQueryPercentEncode,
+  isPathPercentEncode,
+  isUserinfoPercentEncode,
+  isURLEncodedPercentEncode,
+  extraQueryPercentEncodeChars,
+  extraSpecialQueryPercentEncodeChars,
+  percentDecodeString,
+  percentDecodeBytes,
+  utf8PercentEncodeString,
+  utf8PercentEncodeCodePoint
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/url-state-machine.js b/vanilla/node_modules/whatwg-url/lib/url-state-machine.js
new file mode 100644
index 0000000..dd92fd0
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/url-state-machine.js
@@ -0,0 +1,1284 @@
+"use strict";
+require("@exodus/bytes/encoding.js"); // for legacy multi-byte encodings
+const { percentEncodeAfterEncoding } = require("@exodus/bytes/whatwg.js");
+const tr46 = require("tr46");
+
+const infra = require("./infra");
+const { utf8DecodeWithoutBOM } = require("./encoding");
+const { percentDecodeString, utf8PercentEncodeCodePoint, utf8PercentEncodeString,
+  isC0ControlPercentEncode, isFragmentPercentEncode,
+  extraQueryPercentEncodeChars, extraSpecialQueryPercentEncodeChars,
+  isPathPercentEncode, isUserinfoPercentEncode } = require("./percent-encoding");
+
+function p(char) {
+  return char.codePointAt(0);
+}
+
+const specialSchemes = {
+  ftp: 21,
+  file: null,
+  http: 80,
+  https: 443,
+  ws: 80,
+  wss: 443
+};
+
+const failure = Symbol("failure");
+
+function countSymbols(str) {
+  return [...str].length;
+}
+
+function at(input, idx) {
+  const c = input[idx];
+  return isNaN(c) ? undefined : String.fromCodePoint(c);
+}
+
+function isSingleDot(buffer) {
+  return buffer === "." || buffer.toLowerCase() === "%2e";
+}
+
+function isDoubleDot(buffer) {
+  buffer = buffer.toLowerCase();
+  return buffer === ".." || buffer === "%2e." || buffer === ".%2e" || buffer === "%2e%2e";
+}
+
+function isWindowsDriveLetterCodePoints(cp1, cp2) {
+  return infra.isASCIIAlpha(cp1) && (cp2 === p(":") || cp2 === p("|"));
+}
+
+function isWindowsDriveLetterString(string) {
+  return string.length === 2 && infra.isASCIIAlpha(string.codePointAt(0)) && (string[1] === ":" || string[1] === "|");
+}
+
+function isNormalizedWindowsDriveLetterString(string) {
+  return string.length === 2 && infra.isASCIIAlpha(string.codePointAt(0)) && string[1] === ":";
+}
+
+function containsForbiddenHostCodePoint(string) {
+  return string.search(/\u0000|\u0009|\u000A|\u000D|\u0020|#|\/|:|<|>|\?|@|\[|\\|\]|\^|\|/u) !== -1;
+}
+
+function containsForbiddenDomainCodePoint(string) {
+  return containsForbiddenHostCodePoint(string) || string.search(/[\u0000-\u001F]|%|\u007F/u) !== -1;
+}
+
+function isSpecialScheme(scheme) {
+  return specialSchemes[scheme] !== undefined;
+}
+
+function isSpecial(url) {
+  return isSpecialScheme(url.scheme);
+}
+
+function isNotSpecial(url) {
+  return !isSpecialScheme(url.scheme);
+}
+
+function defaultPort(scheme) {
+  return specialSchemes[scheme];
+}
+
+function parseIPv4Number(input) {
+  if (input === "") {
+    return failure;
+  }
+
+  let R = 10;
+
+  if (input.length >= 2 && input.charAt(0) === "0" && input.charAt(1).toLowerCase() === "x") {
+    input = input.substring(2);
+    R = 16;
+  } else if (input.length >= 2 && input.charAt(0) === "0") {
+    input = input.substring(1);
+    R = 8;
+  }
+
+  if (input === "") {
+    return 0;
+  }
+
+  let regex = /[^0-7]/u;
+  if (R === 10) {
+    regex = /[^0-9]/u;
+  }
+  if (R === 16) {
+    regex = /[^0-9A-Fa-f]/u;
+  }
+
+  if (regex.test(input)) {
+    return failure;
+  }
+
+  return parseInt(input, R);
+}
+
+function parseIPv4(input) {
+  const parts = input.split(".");
+  if (parts[parts.length - 1] === "") {
+    if (parts.length > 1) {
+      parts.pop();
+    }
+  }
+
+  if (parts.length > 4) {
+    return failure;
+  }
+
+  const numbers = [];
+  for (const part of parts) {
+    const n = parseIPv4Number(part);
+    if (n === failure) {
+      return failure;
+    }
+
+    numbers.push(n);
+  }
+
+  for (let i = 0; i < numbers.length - 1; ++i) {
+    if (numbers[i] > 255) {
+      return failure;
+    }
+  }
+  if (numbers[numbers.length - 1] >= 256 ** (5 - numbers.length)) {
+    return failure;
+  }
+
+  let ipv4 = numbers.pop();
+  let counter = 0;
+
+  for (const n of numbers) {
+    ipv4 += n * 256 ** (3 - counter);
+    ++counter;
+  }
+
+  return ipv4;
+}
+
+function serializeIPv4(address) {
+  let output = "";
+  let n = address;
+
+  for (let i = 1; i <= 4; ++i) {
+    output = String(n % 256) + output;
+    if (i !== 4) {
+      output = `.${output}`;
+    }
+    n = Math.floor(n / 256);
+  }
+
+  return output;
+}
+
+function parseIPv6(input) {
+  const address = [0, 0, 0, 0, 0, 0, 0, 0];
+  let pieceIndex = 0;
+  let compress = null;
+  let pointer = 0;
+
+  input = Array.from(input, c => c.codePointAt(0));
+
+  if (input[pointer] === p(":")) {
+    if (input[pointer + 1] !== p(":")) {
+      return failure;
+    }
+
+    pointer += 2;
+    ++pieceIndex;
+    compress = pieceIndex;
+  }
+
+  while (pointer < input.length) {
+    if (pieceIndex === 8) {
+      return failure;
+    }
+
+    if (input[pointer] === p(":")) {
+      if (compress !== null) {
+        return failure;
+      }
+      ++pointer;
+      ++pieceIndex;
+      compress = pieceIndex;
+      continue;
+    }
+
+    let value = 0;
+    let length = 0;
+
+    while (length < 4 && infra.isASCIIHex(input[pointer])) {
+      value = value * 0x10 + parseInt(at(input, pointer), 16);
+      ++pointer;
+      ++length;
+    }
+
+    if (input[pointer] === p(".")) {
+      if (length === 0) {
+        return failure;
+      }
+
+      pointer -= length;
+
+      if (pieceIndex > 6) {
+        return failure;
+      }
+
+      let numbersSeen = 0;
+
+      while (input[pointer] !== undefined) {
+        let ipv4Piece = null;
+
+        if (numbersSeen > 0) {
+          if (input[pointer] === p(".") && numbersSeen < 4) {
+            ++pointer;
+          } else {
+            return failure;
+          }
+        }
+
+        if (!infra.isASCIIDigit(input[pointer])) {
+          return failure;
+        }
+
+        while (infra.isASCIIDigit(input[pointer])) {
+          const number = parseInt(at(input, pointer));
+          if (ipv4Piece === null) {
+            ipv4Piece = number;
+          } else if (ipv4Piece === 0) {
+            return failure;
+          } else {
+            ipv4Piece = ipv4Piece * 10 + number;
+          }
+          if (ipv4Piece > 255) {
+            return failure;
+          }
+          ++pointer;
+        }
+
+        address[pieceIndex] = address[pieceIndex] * 0x100 + ipv4Piece;
+
+        ++numbersSeen;
+
+        if (numbersSeen === 2 || numbersSeen === 4) {
+          ++pieceIndex;
+        }
+      }
+
+      if (numbersSeen !== 4) {
+        return failure;
+      }
+
+      break;
+    } else if (input[pointer] === p(":")) {
+      ++pointer;
+      if (input[pointer] === undefined) {
+        return failure;
+      }
+    } else if (input[pointer] !== undefined) {
+      return failure;
+    }
+
+    address[pieceIndex] = value;
+    ++pieceIndex;
+  }
+
+  if (compress !== null) {
+    let swaps = pieceIndex - compress;
+    pieceIndex = 7;
+    while (pieceIndex !== 0 && swaps > 0) {
+      const temp = address[compress + swaps - 1];
+      address[compress + swaps - 1] = address[pieceIndex];
+      address[pieceIndex] = temp;
+      --pieceIndex;
+      --swaps;
+    }
+  } else if (compress === null && pieceIndex !== 8) {
+    return failure;
+  }
+
+  return address;
+}
+
+function serializeIPv6(address) {
+  let output = "";
+  const compress = findTheIPv6AddressCompressedPieceIndex(address);
+  let ignore0 = false;
+
+  for (let pieceIndex = 0; pieceIndex <= 7; ++pieceIndex) {
+    if (ignore0 && address[pieceIndex] === 0) {
+      continue;
+    } else if (ignore0) {
+      ignore0 = false;
+    }
+
+    if (compress === pieceIndex) {
+      const separator = pieceIndex === 0 ? "::" : ":";
+      output += separator;
+      ignore0 = true;
+      continue;
+    }
+
+    output += address[pieceIndex].toString(16);
+
+    if (pieceIndex !== 7) {
+      output += ":";
+    }
+  }
+
+  return output;
+}
+
+function parseHost(input, isOpaque = false) {
+  if (input[0] === "[") {
+    if (input[input.length - 1] !== "]") {
+      return failure;
+    }
+
+    return parseIPv6(input.substring(1, input.length - 1));
+  }
+
+  if (isOpaque) {
+    return parseOpaqueHost(input);
+  }
+
+  const domain = utf8DecodeWithoutBOM(percentDecodeString(input));
+  const asciiDomain = domainToASCII(domain);
+  if (asciiDomain === failure) {
+    return failure;
+  }
+
+  if (endsInANumber(asciiDomain)) {
+    return parseIPv4(asciiDomain);
+  }
+
+  return asciiDomain;
+}
+
+function endsInANumber(input) {
+  const parts = input.split(".");
+  if (parts[parts.length - 1] === "") {
+    if (parts.length === 1) {
+      return false;
+    }
+    parts.pop();
+  }
+
+  const last = parts[parts.length - 1];
+  if (parseIPv4Number(last) !== failure) {
+    return true;
+  }
+
+  if (/^[0-9]+$/u.test(last)) {
+    return true;
+  }
+
+  return false;
+}
+
+function parseOpaqueHost(input) {
+  if (containsForbiddenHostCodePoint(input)) {
+    return failure;
+  }
+
+  return utf8PercentEncodeString(input, isC0ControlPercentEncode);
+}
+
+function findTheIPv6AddressCompressedPieceIndex(address) {
+  let longestIndex = null;
+  let longestSize = 1; // only find elements > 1
+  let foundIndex = null;
+  let foundSize = 0;
+
+  for (let pieceIndex = 0; pieceIndex < address.length; ++pieceIndex) {
+    if (address[pieceIndex] !== 0) {
+      if (foundSize > longestSize) {
+        longestIndex = foundIndex;
+        longestSize = foundSize;
+      }
+
+      foundIndex = null;
+      foundSize = 0;
+    } else {
+      if (foundIndex === null) {
+        foundIndex = pieceIndex;
+      }
+      ++foundSize;
+    }
+  }
+
+  if (foundSize > longestSize) {
+    return foundIndex;
+  }
+
+  return longestIndex;
+}
+
+function serializeHost(host) {
+  if (typeof host === "number") {
+    return serializeIPv4(host);
+  }
+
+  // IPv6 serializer
+  if (host instanceof Array) {
+    return `[${serializeIPv6(host)}]`;
+  }
+
+  return host;
+}
+
+function domainToASCII(domain, beStrict = false) {
+  const result = tr46.toASCII(domain, {
+    checkHyphens: beStrict,
+    checkBidi: true,
+    checkJoiners: true,
+    useSTD3ASCIIRules: beStrict,
+    transitionalProcessing: false,
+    verifyDNSLength: beStrict,
+    ignoreInvalidPunycode: false
+  });
+  if (result === null) {
+    return failure;
+  }
+
+  if (!beStrict) {
+    if (result === "") {
+      return failure;
+    }
+    if (containsForbiddenDomainCodePoint(result)) {
+      return failure;
+    }
+  }
+  return result;
+}
+
+function trimControlChars(string) {
+  // Avoid using regexp because of this V8 bug: https://issues.chromium.org/issues/42204424
+
+  let start = 0;
+  let end = string.length;
+  for (; start < end; ++start) {
+    if (string.charCodeAt(start) > 0x20) {
+      break;
+    }
+  }
+  for (; end > start; --end) {
+    if (string.charCodeAt(end - 1) > 0x20) {
+      break;
+    }
+  }
+  return string.substring(start, end);
+}
+
+function trimTabAndNewline(url) {
+  return url.replace(/\u0009|\u000A|\u000D/ug, "");
+}
+
+function shortenPath(url) {
+  const { path } = url;
+  if (path.length === 0) {
+    return;
+  }
+  if (url.scheme === "file" && path.length === 1 && isNormalizedWindowsDriveLetter(path[0])) {
+    return;
+  }
+
+  path.pop();
+}
+
+function includesCredentials(url) {
+  return url.username !== "" || url.password !== "";
+}
+
+function cannotHaveAUsernamePasswordPort(url) {
+  return url.host === null || url.host === "" || url.scheme === "file";
+}
+
+function hasAnOpaquePath(url) {
+  return typeof url.path === "string";
+}
+
+function isNormalizedWindowsDriveLetter(string) {
+  return /^[A-Za-z]:$/u.test(string);
+}
+
+function URLStateMachine(input, base, encoding, url, stateOverride) {
+  this.pointer = 0;
+  this.input = input;
+  this.base = base || null;
+  this.encoding = encoding || "utf-8";
+  this.stateOverride = stateOverride;
+  this.url = url;
+  this.failure = false;
+  this.parseError = false;
+
+  if (!this.url) {
+    this.url = {
+      scheme: "",
+      username: "",
+      password: "",
+      host: null,
+      port: null,
+      path: [],
+      query: null,
+      fragment: null
+    };
+
+    const res = trimControlChars(this.input);
+    if (res !== this.input) {
+      this.parseError = true;
+    }
+    this.input = res;
+  }
+
+  const res = trimTabAndNewline(this.input);
+  if (res !== this.input) {
+    this.parseError = true;
+  }
+  this.input = res;
+
+  this.state = stateOverride || "scheme start";
+
+  this.buffer = "";
+  this.atSignSeen = false;
+  this.insideBrackets = false;
+  this.passwordTokenSeen = false;
+
+  this.input = Array.from(this.input, c => c.codePointAt(0));
+
+  for (; this.pointer <= this.input.length; ++this.pointer) {
+    const c = this.input[this.pointer];
+    const cStr = isNaN(c) ? undefined : String.fromCodePoint(c);
+
+    // exec state machine
+    const ret = this[`parse ${this.state}`](c, cStr);
+    if (!ret) {
+      break; // terminate algorithm
+    } else if (ret === failure) {
+      this.failure = true;
+      break;
+    }
+  }
+}
+
+URLStateMachine.prototype["parse scheme start"] = function parseSchemeStart(c, cStr) {
+  if (infra.isASCIIAlpha(c)) {
+    this.buffer += cStr.toLowerCase();
+    this.state = "scheme";
+  } else if (!this.stateOverride) {
+    this.state = "no scheme";
+    --this.pointer;
+  } else {
+    this.parseError = true;
+    return failure;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse scheme"] = function parseScheme(c, cStr) {
+  if (infra.isASCIIAlphanumeric(c) || c === p("+") || c === p("-") || c === p(".")) {
+    this.buffer += cStr.toLowerCase();
+  } else if (c === p(":")) {
+    if (this.stateOverride) {
+      if (isSpecial(this.url) && !isSpecialScheme(this.buffer)) {
+        return false;
+      }
+
+      if (!isSpecial(this.url) && isSpecialScheme(this.buffer)) {
+        return false;
+      }
+
+      if ((includesCredentials(this.url) || this.url.port !== null) && this.buffer === "file") {
+        return false;
+      }
+
+      if (this.url.scheme === "file" && this.url.host === "") {
+        return false;
+      }
+    }
+    this.url.scheme = this.buffer;
+    if (this.stateOverride) {
+      if (this.url.port === defaultPort(this.url.scheme)) {
+        this.url.port = null;
+      }
+      return false;
+    }
+    this.buffer = "";
+    if (this.url.scheme === "file") {
+      if (this.input[this.pointer + 1] !== p("/") || this.input[this.pointer + 2] !== p("/")) {
+        this.parseError = true;
+      }
+      this.state = "file";
+    } else if (isSpecial(this.url) && this.base !== null && this.base.scheme === this.url.scheme) {
+      this.state = "special relative or authority";
+    } else if (isSpecial(this.url)) {
+      this.state = "special authority slashes";
+    } else if (this.input[this.pointer + 1] === p("/")) {
+      this.state = "path or authority";
+      ++this.pointer;
+    } else {
+      this.url.path = "";
+      this.state = "opaque path";
+    }
+  } else if (!this.stateOverride) {
+    this.buffer = "";
+    this.state = "no scheme";
+    this.pointer = -1;
+  } else {
+    this.parseError = true;
+    return failure;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse no scheme"] = function parseNoScheme(c) {
+  if (this.base === null || (hasAnOpaquePath(this.base) && c !== p("#"))) {
+    return failure;
+  } else if (hasAnOpaquePath(this.base) && c === p("#")) {
+    this.url.scheme = this.base.scheme;
+    this.url.path = this.base.path;
+    this.url.query = this.base.query;
+    this.url.fragment = "";
+    this.state = "fragment";
+  } else if (this.base.scheme === "file") {
+    this.state = "file";
+    --this.pointer;
+  } else {
+    this.state = "relative";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse special relative or authority"] = function parseSpecialRelativeOrAuthority(c) {
+  if (c === p("/") && this.input[this.pointer + 1] === p("/")) {
+    this.state = "special authority ignore slashes";
+    ++this.pointer;
+  } else {
+    this.parseError = true;
+    this.state = "relative";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse path or authority"] = function parsePathOrAuthority(c) {
+  if (c === p("/")) {
+    this.state = "authority";
+  } else {
+    this.state = "path";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse relative"] = function parseRelative(c) {
+  this.url.scheme = this.base.scheme;
+  if (c === p("/")) {
+    this.state = "relative slash";
+  } else if (isSpecial(this.url) && c === p("\\")) {
+    this.parseError = true;
+    this.state = "relative slash";
+  } else {
+    this.url.username = this.base.username;
+    this.url.password = this.base.password;
+    this.url.host = this.base.host;
+    this.url.port = this.base.port;
+    this.url.path = this.base.path.slice();
+    this.url.query = this.base.query;
+    if (c === p("?")) {
+      this.url.query = "";
+      this.state = "query";
+    } else if (c === p("#")) {
+      this.url.fragment = "";
+      this.state = "fragment";
+    } else if (!isNaN(c)) {
+      this.url.query = null;
+      this.url.path.pop();
+      this.state = "path";
+      --this.pointer;
+    }
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse relative slash"] = function parseRelativeSlash(c) {
+  if (isSpecial(this.url) && (c === p("/") || c === p("\\"))) {
+    if (c === p("\\")) {
+      this.parseError = true;
+    }
+    this.state = "special authority ignore slashes";
+  } else if (c === p("/")) {
+    this.state = "authority";
+  } else {
+    this.url.username = this.base.username;
+    this.url.password = this.base.password;
+    this.url.host = this.base.host;
+    this.url.port = this.base.port;
+    this.state = "path";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse special authority slashes"] = function parseSpecialAuthoritySlashes(c) {
+  if (c === p("/") && this.input[this.pointer + 1] === p("/")) {
+    this.state = "special authority ignore slashes";
+    ++this.pointer;
+  } else {
+    this.parseError = true;
+    this.state = "special authority ignore slashes";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse special authority ignore slashes"] = function parseSpecialAuthorityIgnoreSlashes(c) {
+  if (c !== p("/") && c !== p("\\")) {
+    this.state = "authority";
+    --this.pointer;
+  } else {
+    this.parseError = true;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse authority"] = function parseAuthority(c, cStr) {
+  if (c === p("@")) {
+    this.parseError = true;
+    if (this.atSignSeen) {
+      this.buffer = `%40${this.buffer}`;
+    }
+    this.atSignSeen = true;
+
+    // careful, this is based on buffer and has its own pointer (this.pointer != pointer) and inner chars
+    const len = countSymbols(this.buffer);
+    for (let pointer = 0; pointer < len; ++pointer) {
+      const codePoint = this.buffer.codePointAt(pointer);
+
+      if (codePoint === p(":") && !this.passwordTokenSeen) {
+        this.passwordTokenSeen = true;
+        continue;
+      }
+      const encodedCodePoints = utf8PercentEncodeCodePoint(codePoint, isUserinfoPercentEncode);
+      if (this.passwordTokenSeen) {
+        this.url.password += encodedCodePoints;
+      } else {
+        this.url.username += encodedCodePoints;
+      }
+    }
+    this.buffer = "";
+  } else if (isNaN(c) || c === p("/") || c === p("?") || c === p("#") ||
+             (isSpecial(this.url) && c === p("\\"))) {
+    if (this.atSignSeen && this.buffer === "") {
+      this.parseError = true;
+      return failure;
+    }
+    this.pointer -= countSymbols(this.buffer) + 1;
+    this.buffer = "";
+    this.state = "host";
+  } else {
+    this.buffer += cStr;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse hostname"] =
+URLStateMachine.prototype["parse host"] = function parseHostName(c, cStr) {
+  if (this.stateOverride && this.url.scheme === "file") {
+    --this.pointer;
+    this.state = "file host";
+  } else if (c === p(":") && !this.insideBrackets) {
+    if (this.buffer === "") {
+      this.parseError = true;
+      return failure;
+    }
+
+    if (this.stateOverride === "hostname") {
+      return failure;
+    }
+
+    const host = parseHost(this.buffer, isNotSpecial(this.url));
+    if (host === failure) {
+      return failure;
+    }
+
+    this.url.host = host;
+    this.buffer = "";
+    this.state = "port";
+  } else if (isNaN(c) || c === p("/") || c === p("?") || c === p("#") ||
+             (isSpecial(this.url) && c === p("\\"))) {
+    --this.pointer;
+    if (isSpecial(this.url) && this.buffer === "") {
+      this.parseError = true;
+      return failure;
+    } else if (this.stateOverride && this.buffer === "" &&
+               (includesCredentials(this.url) || this.url.port !== null)) {
+      this.parseError = true;
+      return failure;
+    }
+
+    const host = parseHost(this.buffer, isNotSpecial(this.url));
+    if (host === failure) {
+      return failure;
+    }
+
+    this.url.host = host;
+    this.buffer = "";
+    this.state = "path start";
+    if (this.stateOverride) {
+      return false;
+    }
+  } else {
+    if (c === p("[")) {
+      this.insideBrackets = true;
+    } else if (c === p("]")) {
+      this.insideBrackets = false;
+    }
+    this.buffer += cStr;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse port"] = function parsePort(c, cStr) {
+  if (infra.isASCIIDigit(c)) {
+    this.buffer += cStr;
+  } else if (isNaN(c) || c === p("/") || c === p("?") || c === p("#") ||
+             (isSpecial(this.url) && c === p("\\")) ||
+             this.stateOverride) {
+    if (this.buffer !== "") {
+      const port = parseInt(this.buffer);
+      if (port > 2 ** 16 - 1) {
+        this.parseError = true;
+        return failure;
+      }
+      this.url.port = port === defaultPort(this.url.scheme) ? null : port;
+      this.buffer = "";
+      if (this.stateOverride) {
+        return false;
+      }
+    }
+    if (this.stateOverride) {
+      return failure;
+    }
+    this.state = "path start";
+    --this.pointer;
+  } else {
+    this.parseError = true;
+    return failure;
+  }
+
+  return true;
+};
+
+const fileOtherwiseCodePoints = new Set([p("/"), p("\\"), p("?"), p("#")]);
+
+function startsWithWindowsDriveLetter(input, pointer) {
+  const length = input.length - pointer;
+  return length >= 2 &&
+    isWindowsDriveLetterCodePoints(input[pointer], input[pointer + 1]) &&
+    (length === 2 || fileOtherwiseCodePoints.has(input[pointer + 2]));
+}
+
+URLStateMachine.prototype["parse file"] = function parseFile(c) {
+  this.url.scheme = "file";
+  this.url.host = "";
+
+  if (c === p("/") || c === p("\\")) {
+    if (c === p("\\")) {
+      this.parseError = true;
+    }
+    this.state = "file slash";
+  } else if (this.base !== null && this.base.scheme === "file") {
+    this.url.host = this.base.host;
+    this.url.path = this.base.path.slice();
+    this.url.query = this.base.query;
+    if (c === p("?")) {
+      this.url.query = "";
+      this.state = "query";
+    } else if (c === p("#")) {
+      this.url.fragment = "";
+      this.state = "fragment";
+    } else if (!isNaN(c)) {
+      this.url.query = null;
+      if (!startsWithWindowsDriveLetter(this.input, this.pointer)) {
+        shortenPath(this.url);
+      } else {
+        this.parseError = true;
+        this.url.path = [];
+      }
+
+      this.state = "path";
+      --this.pointer;
+    }
+  } else {
+    this.state = "path";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse file slash"] = function parseFileSlash(c) {
+  if (c === p("/") || c === p("\\")) {
+    if (c === p("\\")) {
+      this.parseError = true;
+    }
+    this.state = "file host";
+  } else {
+    if (this.base !== null && this.base.scheme === "file") {
+      if (!startsWithWindowsDriveLetter(this.input, this.pointer) &&
+          isNormalizedWindowsDriveLetterString(this.base.path[0])) {
+        this.url.path.push(this.base.path[0]);
+      }
+      this.url.host = this.base.host;
+    }
+    this.state = "path";
+    --this.pointer;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse file host"] = function parseFileHost(c, cStr) {
+  if (isNaN(c) || c === p("/") || c === p("\\") || c === p("?") || c === p("#")) {
+    --this.pointer;
+    if (!this.stateOverride && isWindowsDriveLetterString(this.buffer)) {
+      this.parseError = true;
+      this.state = "path";
+    } else if (this.buffer === "") {
+      this.url.host = "";
+      if (this.stateOverride) {
+        return false;
+      }
+      this.state = "path start";
+    } else {
+      let host = parseHost(this.buffer, isNotSpecial(this.url));
+      if (host === failure) {
+        return failure;
+      }
+      if (host === "localhost") {
+        host = "";
+      }
+      this.url.host = host;
+
+      if (this.stateOverride) {
+        return false;
+      }
+
+      this.buffer = "";
+      this.state = "path start";
+    }
+  } else {
+    this.buffer += cStr;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse path start"] = function parsePathStart(c) {
+  if (isSpecial(this.url)) {
+    if (c === p("\\")) {
+      this.parseError = true;
+    }
+    this.state = "path";
+
+    if (c !== p("/") && c !== p("\\")) {
+      --this.pointer;
+    }
+  } else if (!this.stateOverride && c === p("?")) {
+    this.url.query = "";
+    this.state = "query";
+  } else if (!this.stateOverride && c === p("#")) {
+    this.url.fragment = "";
+    this.state = "fragment";
+  } else if (c !== undefined) {
+    this.state = "path";
+    if (c !== p("/")) {
+      --this.pointer;
+    }
+  } else if (this.stateOverride && this.url.host === null) {
+    this.url.path.push("");
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse path"] = function parsePath(c) {
+  if (isNaN(c) || c === p("/") || (isSpecial(this.url) && c === p("\\")) ||
+      (!this.stateOverride && (c === p("?") || c === p("#")))) {
+    if (isSpecial(this.url) && c === p("\\")) {
+      this.parseError = true;
+    }
+
+    if (isDoubleDot(this.buffer)) {
+      shortenPath(this.url);
+      if (c !== p("/") && !(isSpecial(this.url) && c === p("\\"))) {
+        this.url.path.push("");
+      }
+    } else if (isSingleDot(this.buffer) && c !== p("/") &&
+               !(isSpecial(this.url) && c === p("\\"))) {
+      this.url.path.push("");
+    } else if (!isSingleDot(this.buffer)) {
+      if (this.url.scheme === "file" && this.url.path.length === 0 && isWindowsDriveLetterString(this.buffer)) {
+        this.buffer = `${this.buffer[0]}:`;
+      }
+      this.url.path.push(this.buffer);
+    }
+    this.buffer = "";
+    if (c === p("?")) {
+      this.url.query = "";
+      this.state = "query";
+    }
+    if (c === p("#")) {
+      this.url.fragment = "";
+      this.state = "fragment";
+    }
+  } else {
+    // TODO: If c is not a URL code point and not "%", parse error.
+
+    if (c === p("%") &&
+      (!infra.isASCIIHex(this.input[this.pointer + 1]) ||
+        !infra.isASCIIHex(this.input[this.pointer + 2]))) {
+      this.parseError = true;
+    }
+
+    this.buffer += utf8PercentEncodeCodePoint(c, isPathPercentEncode);
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse opaque path"] = function parseOpaquePath(c) {
+  if (c === p("?")) {
+    this.url.query = "";
+    this.state = "query";
+  } else if (c === p("#")) {
+    this.url.fragment = "";
+    this.state = "fragment";
+  } else if (c === p(" ")) {
+    const remaining = this.input[this.pointer + 1];
+    if (remaining === p("?") || remaining === p("#")) {
+      this.url.path += "%20";
+    } else {
+      this.url.path += " ";
+    }
+  } else {
+    // TODO: Add: not a URL code point
+    if (!isNaN(c) && c !== p("%")) {
+      this.parseError = true;
+    }
+
+    if (c === p("%") &&
+        (!infra.isASCIIHex(this.input[this.pointer + 1]) ||
+         !infra.isASCIIHex(this.input[this.pointer + 2]))) {
+      this.parseError = true;
+    }
+
+    if (!isNaN(c)) {
+      this.url.path += utf8PercentEncodeCodePoint(c, isC0ControlPercentEncode);
+    }
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse query"] = function parseQuery(c, cStr) {
+  if (!isSpecial(this.url) || this.url.scheme === "ws" || this.url.scheme === "wss") {
+    this.encoding = "utf-8";
+  }
+
+  if ((!this.stateOverride && c === p("#")) || isNaN(c)) {
+    const percentEncodeSet = isSpecial(this.url) ? extraSpecialQueryPercentEncodeChars : extraQueryPercentEncodeChars;
+    this.url.query += percentEncodeAfterEncoding(
+      this.encoding,
+      this.buffer,
+      percentEncodeSet
+    );
+
+    this.buffer = "";
+
+    if (c === p("#")) {
+      this.url.fragment = "";
+      this.state = "fragment";
+    }
+  } else if (!isNaN(c)) {
+    // TODO: If c is not a URL code point and not "%", parse error.
+
+    if (c === p("%") &&
+      (!infra.isASCIIHex(this.input[this.pointer + 1]) ||
+        !infra.isASCIIHex(this.input[this.pointer + 2]))) {
+      this.parseError = true;
+    }
+
+    this.buffer += cStr;
+  }
+
+  return true;
+};
+
+URLStateMachine.prototype["parse fragment"] = function parseFragment(c) {
+  if (!isNaN(c)) {
+    // TODO: If c is not a URL code point and not "%", parse error.
+    if (c === p("%") &&
+      (!infra.isASCIIHex(this.input[this.pointer + 1]) ||
+        !infra.isASCIIHex(this.input[this.pointer + 2]))) {
+      this.parseError = true;
+    }
+
+    this.url.fragment += utf8PercentEncodeCodePoint(c, isFragmentPercentEncode);
+  }
+
+  return true;
+};
+
+function serializeURL(url, excludeFragment) {
+  let output = `${url.scheme}:`;
+  if (url.host !== null) {
+    output += "//";
+
+    if (url.username !== "" || url.password !== "") {
+      output += url.username;
+      if (url.password !== "") {
+        output += `:${url.password}`;
+      }
+      output += "@";
+    }
+
+    output += serializeHost(url.host);
+
+    if (url.port !== null) {
+      output += `:${url.port}`;
+    }
+  }
+
+  if (url.host === null && !hasAnOpaquePath(url) && url.path.length > 1 && url.path[0] === "") {
+    output += "/.";
+  }
+  output += serializePath(url);
+
+  if (url.query !== null) {
+    output += `?${url.query}`;
+  }
+
+  if (!excludeFragment && url.fragment !== null) {
+    output += `#${url.fragment}`;
+  }
+
+  return output;
+}
+
+function serializeOrigin(tuple) {
+  let result = `${tuple.scheme}://`;
+  result += serializeHost(tuple.host);
+
+  if (tuple.port !== null) {
+    result += `:${tuple.port}`;
+  }
+
+  return result;
+}
+
+function serializePath(url) {
+  if (hasAnOpaquePath(url)) {
+    return url.path;
+  }
+
+  let output = "";
+  for (const segment of url.path) {
+    output += `/${segment}`;
+  }
+  return output;
+}
+
+module.exports.serializeURL = serializeURL;
+
+module.exports.serializePath = serializePath;
+
+module.exports.serializeURLOrigin = function (url) {
+  // https://url.spec.whatwg.org/#concept-url-origin
+  switch (url.scheme) {
+    case "blob": {
+      const pathURL = module.exports.parseURL(serializePath(url));
+      if (pathURL === null) {
+        return "null";
+      }
+      if (pathURL.scheme !== "http" && pathURL.scheme !== "https") {
+        return "null";
+      }
+      return module.exports.serializeURLOrigin(pathURL);
+    }
+    case "ftp":
+    case "http":
+    case "https":
+    case "ws":
+    case "wss":
+      return serializeOrigin({
+        scheme: url.scheme,
+        host: url.host,
+        port: url.port
+      });
+    case "file":
+      // The spec says:
+      // > Unfortunate as it is, this is left as an exercise to the reader. When in doubt, return a new opaque origin.
+      // Browsers tested so far:
+      // - Chrome says "file://", but treats file: URLs as cross-origin for most (all?) purposes; see e.g.
+      //   https://bugs.chromium.org/p/chromium/issues/detail?id=37586
+      // - Firefox says "null", but treats file: URLs as same-origin sometimes based on directory stuff; see
+      //   https://developer.mozilla.org/en-US/docs/Archive/Misc_top_level/Same-origin_policy_for_file:_URIs
+      return "null";
+    default:
+      // serializing an opaque origin returns "null"
+      return "null";
+  }
+};
+
+module.exports.basicURLParse = function (input, options) {
+  if (options === undefined) {
+    options = {};
+  }
+
+  const usm = new URLStateMachine(input, options.baseURL, options.encoding, options.url, options.stateOverride);
+  if (usm.failure) {
+    return null;
+  }
+
+  return usm.url;
+};
+
+module.exports.setTheUsername = function (url, username) {
+  url.username = utf8PercentEncodeString(username, isUserinfoPercentEncode);
+};
+
+module.exports.setThePassword = function (url, password) {
+  url.password = utf8PercentEncodeString(password, isUserinfoPercentEncode);
+};
+
+module.exports.serializeHost = serializeHost;
+
+module.exports.cannotHaveAUsernamePasswordPort = cannotHaveAUsernamePasswordPort;
+
+module.exports.hasAnOpaquePath = hasAnOpaquePath;
+
+module.exports.serializeInteger = function (integer) {
+  return String(integer);
+};
+
+module.exports.parseURL = function (input, options) {
+  if (options === undefined) {
+    options = {};
+  }
+
+  // We don't handle blobs, so this just delegates:
+  return module.exports.basicURLParse(input, { baseURL: options.baseURL, encoding: options.encoding });
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/urlencoded.js b/vanilla/node_modules/whatwg-url/lib/urlencoded.js
new file mode 100644
index 0000000..ed53310
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/urlencoded.js
@@ -0,0 +1,89 @@
+"use strict";
+const { utf8Encode, utf8DecodeWithoutBOM } = require("./encoding");
+const { percentDecodeBytes, utf8PercentEncodeString, isURLEncodedPercentEncode } = require("./percent-encoding");
+
+function p(char) {
+  return char.codePointAt(0);
+}
+
+// https://url.spec.whatwg.org/#concept-urlencoded-parser
+function parseUrlencoded(input) {
+  const sequences = strictlySplitByteSequence(input, p("&"));
+  const output = [];
+  for (const bytes of sequences) {
+    if (bytes.length === 0) {
+      continue;
+    }
+
+    let name, value;
+    const indexOfEqual = bytes.indexOf(p("="));
+
+    if (indexOfEqual >= 0) {
+      name = bytes.slice(0, indexOfEqual);
+      value = bytes.slice(indexOfEqual + 1);
+    } else {
+      name = bytes;
+      value = new Uint8Array(0);
+    }
+
+    name = replaceByteInByteSequence(name, 0x2B, 0x20);
+    value = replaceByteInByteSequence(value, 0x2B, 0x20);
+
+    const nameString = utf8DecodeWithoutBOM(percentDecodeBytes(name));
+    const valueString = utf8DecodeWithoutBOM(percentDecodeBytes(value));
+
+    output.push([nameString, valueString]);
+  }
+  return output;
+}
+
+// https://url.spec.whatwg.org/#concept-urlencoded-string-parser
+function parseUrlencodedString(input) {
+  return parseUrlencoded(utf8Encode(input));
+}
+
+// https://url.spec.whatwg.org/#concept-urlencoded-serializer
+function serializeUrlencoded(tuples) {
+  // TODO: accept and use encoding argument
+
+  let output = "";
+  for (const [i, tuple] of tuples.entries()) {
+    const name = utf8PercentEncodeString(tuple[0], isURLEncodedPercentEncode, true);
+    const value = utf8PercentEncodeString(tuple[1], isURLEncodedPercentEncode, true);
+
+    if (i !== 0) {
+      output += "&";
+    }
+    output += `${name}=${value}`;
+  }
+  return output;
+}
+
+function strictlySplitByteSequence(buf, cp) {
+  const list = [];
+  let last = 0;
+  let i = buf.indexOf(cp);
+  while (i >= 0) {
+    list.push(buf.slice(last, i));
+    last = i + 1;
+    i = buf.indexOf(cp, last);
+  }
+  if (last !== buf.length) {
+    list.push(buf.slice(last));
+  }
+  return list;
+}
+
+function replaceByteInByteSequence(buf, from, to) {
+  let i = buf.indexOf(from);
+  while (i >= 0) {
+    buf[i] = to;
+    i = buf.indexOf(from, i + 1);
+  }
+  return buf;
+}
+
+module.exports = {
+  parseUrlencodedString,
+  serializeUrlencoded
+};
diff --git a/vanilla/node_modules/whatwg-url/lib/utils.js b/vanilla/node_modules/whatwg-url/lib/utils.js
new file mode 100644
index 0000000..5e50979
--- /dev/null
+++ b/vanilla/node_modules/whatwg-url/lib/utils.js
@@ -0,0 +1,252 @@
+"use strict";
+
+// Returns "Type(value) is Object" in ES terminology.
+function isObject(value) {
+  return (typeof value === "object" && value !== null) || typeof value === "function";
+}
+
+const call = Function.call.bind(Function.call);
+
+// Like `Object.assign`, but using `[[GetOwnProperty]]` and `[[DefineOwnProperty]]`
+// instead of `[[Get]]` and `[[Set]]` and only allowing objects
+function define(target, source) {
+  for (const key of Reflect.ownKeys(source)) {
+    const descriptor = Reflect.getOwnPropertyDescriptor(source, key);
+    if (descriptor && !Reflect.defineProperty(target, key, descriptor)) {
+      throw new TypeError(`Cannot redefine property: ${String(key)}`);
+    }
+  }
+}
+
+function newObjectInRealm(globalObject, object) {
+  const ctorRegistry = initCtorRegistry(globalObject);
+  return Object.defineProperties(
+    Object.create(ctorRegistry["%Object.prototype%"]),
+    Object.getOwnPropertyDescriptors(object)
+  );
+}
+
+const wrapperSymbol = Symbol("wrapper");
+const implSymbol = Symbol("impl");
+const sameObjectCaches = Symbol("SameObject caches");
+const ctorRegistrySymbol = Symbol.for("[webidl2js] constructor registry");
+
+const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () {}).prototype);
+
+function initCtorRegistry(globalObject) {
+  if (Object.hasOwn(globalObject, ctorRegistrySymbol)) {
+    return globalObject[ctorRegistrySymbol];
+  }
+
+  const ctorRegistry = Object.create(null);
+
+  // In addition to registering all the WebIDL2JS-generated types in the constructor registry,
+  // we also register a few intrinsics that we make use of in generated code, since they are not
+  // easy to grab from the globalObject variable.
+  ctorRegistry["%Object.prototype%"] = globalObject.Object.prototype;
+  ctorRegistry["%IteratorPrototype%"] = Object.getPrototypeOf(
+    Object.getPrototypeOf(new globalObject.Array()[Symbol.iterator]())
+  );
+
+  try {
+    ctorRegistry["%AsyncIteratorPrototype%"] = Object.getPrototypeOf(
+      Object.getPrototypeOf(
+        globalObject.eval("(async function* () {})").prototype
+      )
+    );
+  } catch {
+    ctorRegistry["%AsyncIteratorPrototype%"] = AsyncIteratorPrototype;
+  }
+
+  globalObject[ctorRegistrySymbol] = ctorRegistry;
+  return ctorRegistry;
+}
+
+function getSameObject(wrapper, prop, creator) {
+  if (!wrapper[sameObjectCaches]) {
+    wrapper[sameObjectCaches] = Object.create(null);
+  }
+
+  if (prop in wrapper[sameObjectCaches]) {
+    return wrapper[sameObjectCaches][prop];
+  }
+
+  wrapper[sameObjectCaches][prop] = creator();
+  return wrapper[sameObjectCaches][prop];
+}
+
+function wrapperForImpl(impl) {
+  return impl ? impl[wrapperSymbol] : null;
+}
+
+function implForWrapper(wrapper) {
+  return wrapper ? wrapper[implSymbol] : null;
+}
+
+function tryWrapperForImpl(impl) {
+  const wrapper = wrapperForImpl(impl);
+  return wrapper ? wrapper : impl;
+}
+
+function tryImplForWrapper(wrapper) {
+  const impl = implForWrapper(wrapper);
+  return impl ? impl : wrapper;
+}
+
+const iterInternalSymbol = Symbol("internal");
+
+function isArrayIndexPropName(P) {
+  if (typeof P !== "string") {
+    return false;
+  }
+  const i = P >>> 0;
+  if (i === 2 ** 32 - 1) {
+    return false;
+  }
+  const s = `${i}`;
+  if (P !== s) {
+    return false;
+  }
+  return true;
+}
+
+const arrayBufferByteLengthGetter =
+    Object.getOwnPropertyDescriptor(ArrayBuffer.prototype, "byteLength").get;
+function isArrayBuffer(value) {
+  try {
+    arrayBufferByteLengthGetter.call(value);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+const sharedArrayBufferByteLengthGetter =
+  Object.getOwnPropertyDescriptor(SharedArrayBuffer.prototype, "byteLength").get;
+function isSharedArrayBuffer(value) {
+  try {
+    sharedArrayBufferByteLengthGetter.call(value);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function iteratorResult([key, value], kind) {
+  let result;
+  switch (kind) {
+    case "key":
+      result = key;
+      break;
+    case "value":
+      result = value;
+      break;
+    case "key+value":
+      result = [key, value];
+      break;
+  }
+  return { value: result, done: false };
+}
+
+function ordinarySetWithOwnDescriptor(target, property, value, receiver, ownDesc) {
+  if (ownDesc === undefined) {
+    const parent = Reflect.getPrototypeOf(target);
+    if (parent !== null) {
+      return Reflect.set(parent, property, value, receiver);
+    }
+    ownDesc = { writable: true, enumerable: true, configurable: true, value: undefined };
+  }
+  if (isDataDescriptor(ownDesc)) {
+    if (!ownDesc.writable) {
+      return false;
+    }
+    if (!isObject(receiver)) {
+      return false;
+    }
+    const existingDesc = Reflect.getOwnPropertyDescriptor(receiver, property);
+    if (existingDesc !== undefined) {
+      if (isAccessorDescriptor(existingDesc)) {
+        return false;
+      }
+      if (existingDesc.writable === false) {
+        return false;
+      }
+      const valueDesc = { value };
+      return Reflect.defineProperty(receiver, property, valueDesc);
+    }
+
+    return Reflect.defineProperty(
+      receiver,
+      property,
+      { value, writable: true, enumerable: true, configurable: true }
+    );
+  }
+
+  const setter = ownDesc.set;
+  if (setter === undefined) {
+    return false;
+  }
+  call(setter, receiver, value);
+  return true;
+}
+
+function isDataDescriptor(desc) {
+  return Object.hasOwn(desc, "value") || Object.hasOwn(desc, "writable");
+}
+
+function isAccessorDescriptor(desc) {
+  return Object.hasOwn(desc, "get") || Object.hasOwn(desc, "set");
+}
+
+const supportsPropertyIndex = Symbol("supports property index");
+const supportedPropertyIndices = Symbol("supported property indices");
+const supportsPropertyName = Symbol("supports property name");
+const supportedPropertyNames = Symbol("supported property names");
+const indexedGet = Symbol("indexed property get");
+const indexedSetNew = Symbol("indexed property set new");
+const indexedSetExisting = Symbol("indexed property set existing");
+const namedGet = Symbol("named property get");
+const namedSetNew = Symbol("named property set new");
+const namedSetExisting = Symbol("named property set existing");
+const namedDelete = Symbol("named property delete");
+
+const asyncIteratorNext = Symbol("async iterator get the next iteration result");
+const asyncIteratorReturn = Symbol("async iterator return steps");
+const asyncIteratorInit = Symbol("async iterator initialization steps");
+const asyncIteratorEOI = Symbol("async iterator end of iteration");
+
+module.exports = exports = {
+  isObject,
+  define,
+  newObjectInRealm,
+  wrapperSymbol,
+  implSymbol,
+  getSameObject,
+  ctorRegistrySymbol,
+  initCtorRegistry,
+  wrapperForImpl,
+  implForWrapper,
+  tryWrapperForImpl,
+  tryImplForWrapper,
+  iterInternalSymbol,
+  isArrayBuffer,
+  isSharedArrayBuffer,
+  isArrayIndexPropName,
+  supportsPropertyIndex,
+  supportedPropertyIndices,
+  supportsPropertyName,
+  supportedPropertyNames,
+  indexedGet,
+  indexedSetNew,
+  indexedSetExisting,
+  namedGet,
+  namedSetNew,
+  namedSetExisting,
+  namedDelete,
+  asyncIteratorNext,
+  asyncIteratorReturn,
+  asyncIteratorInit,
+  asyncIteratorEOI,
+  iteratorResult,
+  ordinarySetWithOwnDescriptor
+};