text: "use strict";
  
  const conversions = require("webidl-conversions");
  const utils = require("./utils.js");
  const Event = require("./Event.js");
  const impl = utils.implSymbol;
  const convertProgressEventInit = require("./ProgressEventInit").convert;
  
  function ProgressEvent(type) {
    if (!new.target) {
      throw new TypeError(
        "Failed to construct 'ProgressEvent'. Please use the 'new' operator; this constructor cannot be called as a function."
      );
    }
    if (arguments.length < 1) {
      throw new TypeError(
        "Failed to construct 'ProgressEvent': 1 argument required, but only " + arguments.length + " present."
      );
    }
  
    const args = [];
    for (let i = 0; i < arguments.length && i < 2; ++i) {
      args[i] = arguments[i];
    }
    args[0] = conversions["DOMString"](args[0], { context: "Failed to construct 'ProgressEvent': parameter 1" });
    args[1] = convertProgressEventInit(args[1], { context: "Failed to construct 'ProgressEvent': parameter 2" });
  
    iface.setup(this, args);
  }
  Object.setPrototypeOf(ProgressEvent.prototype, Event.interface.prototype);
  Object.setPrototypeOf(ProgressEvent, Event.interface);
  
  Object.defineProperty(ProgressEvent.prototype, "lengthComputable", {
    get() {
      return this[impl].lengthComputable;
    },
    enumerable: true,
    configurable: true
  });
  
  Object.defineProperty(ProgressEvent.prototype, "loaded", {
    get() {
      return this[impl].loaded;
    },
    enumerable: true,
    configurable: true
  });
  
  Object.defineProperty(ProgressEvent.prototype, "total", {
    get() {
      return this[impl].total;
    },
    enumerable: true,
    configurable: true
  });
  
  Object.defineProperty(ProgressEvent.prototype, Symbol.toStringTag, {
    value: "ProgressEvent",
    writable: false,
    enumerable: false,
    configurable: true
  });
  
  const iface = {
    mixedInto: [],
    is(obj) {
      if (obj) {
        if (obj[impl] instanceof Impl.implementation) {
          return true;
        }
        for (let i = 0; i < module.exports.mixedInto.length; ++i) {
          if (obj instanceof module.exports.mixedInto[i]) {
            return true;
          }
        }
      }
      return false;
    },
    isImpl(obj) {
      if (obj) {
        if (obj instanceof Impl.implementation) {
          return true;
        }
  
        const wrapper = utils.wrapperForImpl(obj);
        for (let i = 0; i < module.exports.mixedInto.length; ++i) {
          if (wrapper instanceof module.exports.mixedInto[i]) {
            return true;
          }
        }
      }
      return false;
    },
    convert(obj, { context = "The provided value" } = {}) {
      if (module.exports.is(obj)) {
        return utils.implForWrapper(obj);
      }
      throw new TypeError(`${context} is not of type 'ProgressEvent'.`);
    },
    create(constructorArgs, privateData) {
      let obj = Object.create(ProgressEvent.prototype);
      this.setup(obj, constructorArgs, privateData);
      return obj;
    },
    createImpl(constructorArgs, privateData) {
      let obj = Object.create(ProgressEvent.prototype);
      this.setup(obj, constructorArgs, privateData);
      return utils.implForWrapper(obj);
    },
    _internalSetup(obj) {
      Event._internalSetup(obj);
    },
    setup(obj, constructorArgs, privateData) {
      if (!privateData) privateData = {};
      privateData.wrapper = obj;
  
      this._internalSetup(obj);
  
      Object.defineProperty(obj, impl, {
        value: new Impl.implementation(constructorArgs, privateData),
        writable: false,
        enumerable: false,
        configurable: true
      });
      obj[impl][utils.wrapperSymbol] = obj;
    },
    interface: ProgressEvent,
    expose: {
      Window: { ProgressEvent: ProgressEvent },
      DedicatedWorker: { ProgressEvent: ProgressEvent },
      SharedWorker: { ProgressEvent: ProgressEvent }
    }
  };
  module.exports = iface;
  
  const Impl = require("../events/ProgressEvent-impl.js");
  