text: "use strict";
  
  const conversions = require("webidl-conversions");
  const utils = require("./utils.js");
  
  const convertErrorEventInit = require("./ErrorEventInit.js").convert;
  const impl = utils.implSymbol;
  const ctorRegistry = utils.ctorRegistrySymbol;
  const Event = require("./Event.js");
  
  /**
   * When an interface-module that implements this interface as a mixin is loaded, it will append its own `.is()`
   * method into this array. It allows objects that directly implements *those* interfaces to be recognized as
   * implementing this mixin interface.
   */
  exports._mixedIntoPredicates = [];
  exports.is = function is(obj) {
    if (obj) {
      if (utils.hasOwn(obj, impl) && obj[impl] instanceof Impl.implementation) {
        return true;
      }
      for (const isMixedInto of exports._mixedIntoPredicates) {
        if (isMixedInto(obj)) {
          return true;
        }
      }
    }
    return false;
  };
  exports.isImpl = function isImpl(obj) {
    if (obj) {
      if (obj instanceof Impl.implementation) {
        return true;
      }
  
      const wrapper = utils.wrapperForImpl(obj);
      for (const isMixedInto of exports._mixedIntoPredicates) {
        if (isMixedInto(wrapper)) {
          return true;
        }
      }
    }
    return false;
  };
  exports.convert = function convert(obj, { context = "The provided value" } = {}) {
    if (exports.is(obj)) {
      return utils.implForWrapper(obj);
    }
    throw new TypeError(`${context} is not of type 'ErrorEvent'.`);
  };
  
  exports.create = function create(globalObject, constructorArgs, privateData) {
    if (globalObject[ctorRegistry] === undefined) {
      throw new Error("Internal error: invalid global object");
    }
  
    const ctor = globalObject[ctorRegistry]["ErrorEvent"];
    if (ctor === undefined) {
      throw new Error("Internal error: constructor ErrorEvent is not installed on the passed global object");
    }
  
    let obj = Object.create(ctor.prototype);
    obj = exports.setup(obj, globalObject, constructorArgs, privateData);
    return obj;
  };
  exports.createImpl = function createImpl(globalObject, constructorArgs, privateData) {
    const obj = exports.create(globalObject, constructorArgs, privateData);
    return utils.implForWrapper(obj);
  };
  exports._internalSetup = function _internalSetup(obj) {
    Event._internalSetup(obj);
  };
  exports.setup = function setup(obj, globalObject, constructorArgs = [], privateData = {}) {
    privateData.wrapper = obj;
  
    exports._internalSetup(obj);
    Object.defineProperty(obj, impl, {
      value: new Impl.implementation(globalObject, constructorArgs, privateData),
      configurable: true
    });
  
    obj[impl][utils.wrapperSymbol] = obj;
    if (Impl.init) {
      Impl.init(obj[impl], privateData);
    }
    return obj;
  };
  
  exports.install = function install(globalObject) {
    if (globalObject.Event === undefined) {
      throw new Error("Internal error: attempting to evaluate ErrorEvent before Event");
    }
    class ErrorEvent extends globalObject.Event {
      constructor(type) {
        if (arguments.length < 1) {
          throw new TypeError(
            "Failed to construct 'ErrorEvent': 1 argument required, but only " + arguments.length + " present."
          );
        }
        const args = [];
        {
          let curArg = arguments[0];
          curArg = conversions["DOMString"](curArg, { context: "Failed to construct 'ErrorEvent': parameter 1" });
          args.push(curArg);
        }
        {
          let curArg = arguments[1];
          curArg = convertErrorEventInit(curArg, { context: "Failed to construct 'ErrorEvent': parameter 2" });
          args.push(curArg);
        }
        return exports.setup(Object.create(new.target.prototype), globalObject, args);
      }
  
      get message() {
        if (!this || !exports.is(this)) {
          throw new TypeError("Illegal invocation");
        }
  
        return this[impl]["message"];
      }
  
      get filename() {
        if (!this || !exports.is(this)) {
          throw new TypeError("Illegal invocation");
        }
  
        return this[impl]["filename"];
      }
  
      get lineno() {
        if (!this || !exports.is(this)) {
          throw new TypeError("Illegal invocation");
        }
  
        return this[impl]["lineno"];
      }
  
      get colno() {
        if (!this || !exports.is(this)) {
          throw new TypeError("Illegal invocation");
        }
  
        return this[impl]["colno"];
      }
  
      get error() {
        if (!this || !exports.is(this)) {
          throw new TypeError("Illegal invocation");
        }
  
        return this[impl]["error"];
      }
    }
    Object.defineProperties(ErrorEvent.prototype, {
      message: { enumerable: true },
      filename: { enumerable: true },
      lineno: { enumerable: true },
      colno: { enumerable: true },
      error: { enumerable: true },
      [Symbol.toStringTag]: { value: "ErrorEvent", configurable: true }
    });
    if (globalObject[ctorRegistry] === undefined) {
      globalObject[ctorRegistry] = Object.create(null);
    }
    globalObject[ctorRegistry]["ErrorEvent"] = ErrorEvent;
  
    Object.defineProperty(globalObject, "ErrorEvent", {
      configurable: true,
      writable: true,
      value: ErrorEvent
    });
  };
  
  const Impl = require("../events/ErrorEvent-impl.js");
  