Changed alot of things.

node_modules/event-target-shim/dist/event-target-shim.js

@@ -0,0 +1,871 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * @copyright 2015 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+/**
+ * @typedef {object} PrivateData
+ * @property {EventTarget} eventTarget The event target.
+ * @property {{type:string}} event The original event object.
+ * @property {number} eventPhase The current event phase.
+ * @property {EventTarget|null} currentTarget The current event target.
+ * @property {boolean} canceled The flag to prevent default.
+ * @property {boolean} stopped The flag to stop propagation.
+ * @property {boolean} immediateStopped The flag to stop propagation immediately.
+ * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.
+ * @property {number} timeStamp The unix time.
+ * @private
+ */
+
+/**
+ * Private data for event wrappers.
+ * @type {WeakMap<Event, PrivateData>}
+ * @private
+ */
+const privateData = new WeakMap();
+
+/**
+ * Cache for wrapper classes.
+ * @type {WeakMap<Object, Function>}
+ * @private
+ */
+const wrappers = new WeakMap();
+
+/**
+ * Get private data.
+ * @param {Event} event The event object to get private data.
+ * @returns {PrivateData} The private data of the event.
+ * @private
+ */
+function pd(event) {
+    const retv = privateData.get(event);
+    console.assert(
+        retv != null,
+        "'this' is expected an Event object, but got",
+        event
+    );
+    return retv
+}
+
+/**
+ * https://dom.spec.whatwg.org/#set-the-canceled-flag
+ * @param data {PrivateData} private data.
+ */
+function setCancelFlag(data) {
+    if (data.passiveListener != null) {
+        if (
+            typeof console !== "undefined" &&
+            typeof console.error === "function"
+        ) {
+            console.error(
+                "Unable to preventDefault inside passive event listener invocation.",
+                data.passiveListener
+            );
+        }
+        return
+    }
+    if (!data.event.cancelable) {
+        return
+    }
+
+    data.canceled = true;
+    if (typeof data.event.preventDefault === "function") {
+        data.event.preventDefault();
+    }
+}
+
+/**
+ * @see https://dom.spec.whatwg.org/#interface-event
+ * @private
+ */
+/**
+ * The event wrapper.
+ * @constructor
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Event|{type:string}} event The original event to wrap.
+ */
+function Event(eventTarget, event) {
+    privateData.set(this, {
+        eventTarget,
+        event,
+        eventPhase: 2,
+        currentTarget: eventTarget,
+        canceled: false,
+        stopped: false,
+        immediateStopped: false,
+        passiveListener: null,
+        timeStamp: event.timeStamp || Date.now(),
+    });
+
+    // https://heycam.github.io/webidl/#Unforgeable
+    Object.defineProperty(this, "isTrusted", { value: false, enumerable: true });
+
+    // Define accessors
+    const keys = Object.keys(event);
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in this)) {
+            Object.defineProperty(this, key, defineRedirectDescriptor(key));
+        }
+    }
+}
+
+// Should be enumerable, but class methods are not enumerable.
+Event.prototype = {
+    /**
+     * The type of this event.
+     * @type {string}
+     */
+    get type() {
+        return pd(this).event.type
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get target() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get currentTarget() {
+        return pd(this).currentTarget
+    },
+
+    /**
+     * @returns {EventTarget[]} The composed path of this event.
+     */
+    composedPath() {
+        const currentTarget = pd(this).currentTarget;
+        if (currentTarget == null) {
+            return []
+        }
+        return [currentTarget]
+    },
+
+    /**
+     * Constant of NONE.
+     * @type {number}
+     */
+    get NONE() {
+        return 0
+    },
+
+    /**
+     * Constant of CAPTURING_PHASE.
+     * @type {number}
+     */
+    get CAPTURING_PHASE() {
+        return 1
+    },
+
+    /**
+     * Constant of AT_TARGET.
+     * @type {number}
+     */
+    get AT_TARGET() {
+        return 2
+    },
+
+    /**
+     * Constant of BUBBLING_PHASE.
+     * @type {number}
+     */
+    get BUBBLING_PHASE() {
+        return 3
+    },
+
+    /**
+     * The target of this event.
+     * @type {number}
+     */
+    get eventPhase() {
+        return pd(this).eventPhase
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopPropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.stopPropagation === "function") {
+            data.event.stopPropagation();
+        }
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopImmediatePropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        data.immediateStopped = true;
+        if (typeof data.event.stopImmediatePropagation === "function") {
+            data.event.stopImmediatePropagation();
+        }
+    },
+
+    /**
+     * The flag to be bubbling.
+     * @type {boolean}
+     */
+    get bubbles() {
+        return Boolean(pd(this).event.bubbles)
+    },
+
+    /**
+     * The flag to be cancelable.
+     * @type {boolean}
+     */
+    get cancelable() {
+        return Boolean(pd(this).event.cancelable)
+    },
+
+    /**
+     * Cancel this event.
+     * @returns {void}
+     */
+    preventDefault() {
+        setCancelFlag(pd(this));
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     */
+    get defaultPrevented() {
+        return pd(this).canceled
+    },
+
+    /**
+     * The flag to be composed.
+     * @type {boolean}
+     */
+    get composed() {
+        return Boolean(pd(this).event.composed)
+    },
+
+    /**
+     * The unix time of this event.
+     * @type {number}
+     */
+    get timeStamp() {
+        return pd(this).timeStamp
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     * @deprecated
+     */
+    get srcElement() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The flag to stop event bubbling.
+     * @type {boolean}
+     * @deprecated
+     */
+    get cancelBubble() {
+        return pd(this).stopped
+    },
+    set cancelBubble(value) {
+        if (!value) {
+            return
+        }
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.cancelBubble === "boolean") {
+            data.event.cancelBubble = true;
+        }
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     * @deprecated
+     */
+    get returnValue() {
+        return !pd(this).canceled
+    },
+    set returnValue(value) {
+        if (!value) {
+            setCancelFlag(pd(this));
+        }
+    },
+
+    /**
+     * Initialize this event object. But do nothing under event dispatching.
+     * @param {string} type The event type.
+     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.
+     * @param {boolean} [cancelable=false] The flag to be possible to cancel.
+     * @deprecated
+     */
+    initEvent() {
+        // Do nothing.
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(Event.prototype, "constructor", {
+    value: Event,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `event instanceof window.Event` is `true`.
+if (typeof window !== "undefined" && typeof window.Event !== "undefined") {
+    Object.setPrototypeOf(Event.prototype, window.Event.prototype);
+
+    // Make association for wrappers.
+    wrappers.set(window.Event.prototype, Event);
+}
+
+/**
+ * Get the property descriptor to redirect a given property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to redirect the property.
+ * @private
+ */
+function defineRedirectDescriptor(key) {
+    return {
+        get() {
+            return pd(this).event[key]
+        },
+        set(value) {
+            pd(this).event[key] = value;
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Get the property descriptor to call a given method property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to call the method property.
+ * @private
+ */
+function defineCallDescriptor(key) {
+    return {
+        value() {
+            const event = pd(this).event;
+            return event[key].apply(event, arguments)
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define new wrapper class.
+ * @param {Function} BaseEvent The base wrapper class.
+ * @param {Object} proto The prototype of the original event.
+ * @returns {Function} The defined wrapper class.
+ * @private
+ */
+function defineWrapper(BaseEvent, proto) {
+    const keys = Object.keys(proto);
+    if (keys.length === 0) {
+        return BaseEvent
+    }
+
+    /** CustomEvent */
+    function CustomEvent(eventTarget, event) {
+        BaseEvent.call(this, eventTarget, event);
+    }
+
+    CustomEvent.prototype = Object.create(BaseEvent.prototype, {
+        constructor: { value: CustomEvent, configurable: true, writable: true },
+    });
+
+    // Define accessors.
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in BaseEvent.prototype)) {
+            const descriptor = Object.getOwnPropertyDescriptor(proto, key);
+            const isFunc = typeof descriptor.value === "function";
+            Object.defineProperty(
+                CustomEvent.prototype,
+                key,
+                isFunc
+                    ? defineCallDescriptor(key)
+                    : defineRedirectDescriptor(key)
+            );
+        }
+    }
+
+    return CustomEvent
+}
+
+/**
+ * Get the wrapper class of a given prototype.
+ * @param {Object} proto The prototype of the original event to get its wrapper.
+ * @returns {Function} The wrapper class.
+ * @private
+ */
+function getWrapper(proto) {
+    if (proto == null || proto === Object.prototype) {
+        return Event
+    }
+
+    let wrapper = wrappers.get(proto);
+    if (wrapper == null) {
+        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto);
+        wrappers.set(proto, wrapper);
+    }
+    return wrapper
+}
+
+/**
+ * Wrap a given event to management a dispatching.
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Object} event The event to wrap.
+ * @returns {Event} The wrapper instance.
+ * @private
+ */
+function wrapEvent(eventTarget, event) {
+    const Wrapper = getWrapper(Object.getPrototypeOf(event));
+    return new Wrapper(eventTarget, event)
+}
+
+/**
+ * Get the immediateStopped flag of a given event.
+ * @param {Event} event The event to get.
+ * @returns {boolean} The flag to stop propagation immediately.
+ * @private
+ */
+function isStopped(event) {
+    return pd(event).immediateStopped
+}
+
+/**
+ * Set the current event phase of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {number} eventPhase New event phase.
+ * @returns {void}
+ * @private
+ */
+function setEventPhase(event, eventPhase) {
+    pd(event).eventPhase = eventPhase;
+}
+
+/**
+ * Set the current target of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {EventTarget|null} currentTarget New current target.
+ * @returns {void}
+ * @private
+ */
+function setCurrentTarget(event, currentTarget) {
+    pd(event).currentTarget = currentTarget;
+}
+
+/**
+ * Set a passive listener of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {Function|null} passiveListener New passive listener.
+ * @returns {void}
+ * @private
+ */
+function setPassiveListener(event, passiveListener) {
+    pd(event).passiveListener = passiveListener;
+}
+
+/**
+ * @typedef {object} ListenerNode
+ * @property {Function} listener
+ * @property {1|2|3} listenerType
+ * @property {boolean} passive
+ * @property {boolean} once
+ * @property {ListenerNode|null} next
+ * @private
+ */
+
+/**
+ * @type {WeakMap<object, Map<string, ListenerNode>>}
+ * @private
+ */
+const listenersMap = new WeakMap();
+
+// Listener types
+const CAPTURE = 1;
+const BUBBLE = 2;
+const ATTRIBUTE = 3;
+
+/**
+ * Check whether a given value is an object or not.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is an object.
+ */
+function isObject(x) {
+    return x !== null && typeof x === "object" //eslint-disable-line no-restricted-syntax
+}
+
+/**
+ * Get listeners.
+ * @param {EventTarget} eventTarget The event target to get.
+ * @returns {Map<string, ListenerNode>} The listeners.
+ * @private
+ */
+function getListeners(eventTarget) {
+    const listeners = listenersMap.get(eventTarget);
+    if (listeners == null) {
+        throw new TypeError(
+            "'this' is expected an EventTarget object, but got another value."
+        )
+    }
+    return listeners
+}
+
+/**
+ * Get the property descriptor for the event attribute of a given event.
+ * @param {string} eventName The event name to get property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor.
+ * @private
+ */
+function defineEventAttributeDescriptor(eventName) {
+    return {
+        get() {
+            const listeners = getListeners(this);
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    return node.listener
+                }
+                node = node.next;
+            }
+            return null
+        },
+
+        set(listener) {
+            if (typeof listener !== "function" && !isObject(listener)) {
+                listener = null; // eslint-disable-line no-param-reassign
+            }
+            const listeners = getListeners(this);
+
+            // Traverse to the tail while removing old value.
+            let prev = null;
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    // Remove old value.
+                    if (prev !== null) {
+                        prev.next = node.next;
+                    } else if (node.next !== null) {
+                        listeners.set(eventName, node.next);
+                    } else {
+                        listeners.delete(eventName);
+                    }
+                } else {
+                    prev = node;
+                }
+
+                node = node.next;
+            }
+
+            // Add new value.
+            if (listener !== null) {
+                const newNode = {
+                    listener,
+                    listenerType: ATTRIBUTE,
+                    passive: false,
+                    once: false,
+                    next: null,
+                };
+                if (prev === null) {
+                    listeners.set(eventName, newNode);
+                } else {
+                    prev.next = newNode;
+                }
+            }
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define an event attribute (e.g. `eventTarget.onclick`).
+ * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.
+ * @param {string} eventName The event name to define.
+ * @returns {void}
+ */
+function defineEventAttribute(eventTargetPrototype, eventName) {
+    Object.defineProperty(
+        eventTargetPrototype,
+        `on${eventName}`,
+        defineEventAttributeDescriptor(eventName)
+    );
+}
+
+/**
+ * Define a custom EventTarget with event attributes.
+ * @param {string[]} eventNames Event names for event attributes.
+ * @returns {EventTarget} The custom EventTarget.
+ * @private
+ */
+function defineCustomEventTarget(eventNames) {
+    /** CustomEventTarget */
+    function CustomEventTarget() {
+        EventTarget.call(this);
+    }
+
+    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {
+        constructor: {
+            value: CustomEventTarget,
+            configurable: true,
+            writable: true,
+        },
+    });
+
+    for (let i = 0; i < eventNames.length; ++i) {
+        defineEventAttribute(CustomEventTarget.prototype, eventNames[i]);
+    }
+
+    return CustomEventTarget
+}
+
+/**
+ * EventTarget.
+ *
+ * - This is constructor if no arguments.
+ * - This is a function which returns a CustomEventTarget constructor if there are arguments.
+ *
+ * For example:
+ *
+ *     class A extends EventTarget {}
+ *     class B extends EventTarget("message") {}
+ *     class C extends EventTarget("message", "error") {}
+ *     class D extends EventTarget(["message", "error"]) {}
+ */
+function EventTarget() {
+    /*eslint-disable consistent-return */
+    if (this instanceof EventTarget) {
+        listenersMap.set(this, new Map());
+        return
+    }
+    if (arguments.length === 1 && Array.isArray(arguments[0])) {
+        return defineCustomEventTarget(arguments[0])
+    }
+    if (arguments.length > 0) {
+        const types = new Array(arguments.length);
+        for (let i = 0; i < arguments.length; ++i) {
+            types[i] = arguments[i];
+        }
+        return defineCustomEventTarget(types)
+    }
+    throw new TypeError("Cannot call a class as a function")
+    /*eslint-enable consistent-return */
+}
+
+// Should be enumerable, but class methods are not enumerable.
+EventTarget.prototype = {
+    /**
+     * Add a given listener to this event target.
+     * @param {string} eventName The event name to add.
+     * @param {Function} listener The listener to add.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    addEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+        if (typeof listener !== "function" && !isObject(listener)) {
+            throw new TypeError("'listener' should be a function or an object.")
+        }
+
+        const listeners = getListeners(this);
+        const optionsIsObj = isObject(options);
+        const capture = optionsIsObj
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+        const newNode = {
+            listener,
+            listenerType,
+            passive: optionsIsObj && Boolean(options.passive),
+            once: optionsIsObj && Boolean(options.once),
+            next: null,
+        };
+
+        // Set it as the first node if the first node is null.
+        let node = listeners.get(eventName);
+        if (node === undefined) {
+            listeners.set(eventName, newNode);
+            return
+        }
+
+        // Traverse to the tail while checking duplication..
+        let prev = null;
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                // Should ignore duplication.
+                return
+            }
+            prev = node;
+            node = node.next;
+        }
+
+        // Add it.
+        prev.next = newNode;
+    },
+
+    /**
+     * Remove a given listener from this event target.
+     * @param {string} eventName The event name to remove.
+     * @param {Function} listener The listener to remove.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    removeEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+
+        const listeners = getListeners(this);
+        const capture = isObject(options)
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+
+        let prev = null;
+        let node = listeners.get(eventName);
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+                return
+            }
+
+            prev = node;
+            node = node.next;
+        }
+    },
+
+    /**
+     * Dispatch a given event.
+     * @param {Event|{type:string}} event The event to dispatch.
+     * @returns {boolean} `false` if canceled.
+     */
+    dispatchEvent(event) {
+        if (event == null || typeof event.type !== "string") {
+            throw new TypeError('"event.type" should be a string.')
+        }
+
+        // If listeners aren't registered, terminate.
+        const listeners = getListeners(this);
+        const eventName = event.type;
+        let node = listeners.get(eventName);
+        if (node == null) {
+            return true
+        }
+
+        // Since we cannot rewrite several properties, so wrap object.
+        const wrappedEvent = wrapEvent(this, event);
+
+        // This doesn't process capturing phase and bubbling phase.
+        // This isn't participating in a tree.
+        let prev = null;
+        while (node != null) {
+            // Remove this listener if it's once
+            if (node.once) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+            } else {
+                prev = node;
+            }
+
+            // Call this listener
+            setPassiveListener(
+                wrappedEvent,
+                node.passive ? node.listener : null
+            );
+            if (typeof node.listener === "function") {
+                try {
+                    node.listener.call(this, wrappedEvent);
+                } catch (err) {
+                    if (
+                        typeof console !== "undefined" &&
+                        typeof console.error === "function"
+                    ) {
+                        console.error(err);
+                    }
+                }
+            } else if (
+                node.listenerType !== ATTRIBUTE &&
+                typeof node.listener.handleEvent === "function"
+            ) {
+                node.listener.handleEvent(wrappedEvent);
+            }
+
+            // Break if `event.stopImmediatePropagation` was called.
+            if (isStopped(wrappedEvent)) {
+                break
+            }
+
+            node = node.next;
+        }
+        setPassiveListener(wrappedEvent, null);
+        setEventPhase(wrappedEvent, 0);
+        setCurrentTarget(wrappedEvent, null);
+
+        return !wrappedEvent.defaultPrevented
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(EventTarget.prototype, "constructor", {
+    value: EventTarget,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `eventTarget instanceof window.EventTarget` is `true`.
+if (
+    typeof window !== "undefined" &&
+    typeof window.EventTarget !== "undefined"
+) {
+    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype);
+}
+
+exports.defineEventAttribute = defineEventAttribute;
+exports.EventTarget = EventTarget;
+exports.default = EventTarget;
+
+module.exports = EventTarget
+module.exports.EventTarget = module.exports["default"] = EventTarget
+module.exports.defineEventAttribute = defineEventAttribute
+//# sourceMappingURL=event-target-shim.js.map

node_modules/event-target-shim/dist/event-target-shim.mjs

@@ -0,0 +1,862 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * @copyright 2015 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+/**
+ * @typedef {object} PrivateData
+ * @property {EventTarget} eventTarget The event target.
+ * @property {{type:string}} event The original event object.
+ * @property {number} eventPhase The current event phase.
+ * @property {EventTarget|null} currentTarget The current event target.
+ * @property {boolean} canceled The flag to prevent default.
+ * @property {boolean} stopped The flag to stop propagation.
+ * @property {boolean} immediateStopped The flag to stop propagation immediately.
+ * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.
+ * @property {number} timeStamp The unix time.
+ * @private
+ */
+
+/**
+ * Private data for event wrappers.
+ * @type {WeakMap<Event, PrivateData>}
+ * @private
+ */
+const privateData = new WeakMap();
+
+/**
+ * Cache for wrapper classes.
+ * @type {WeakMap<Object, Function>}
+ * @private
+ */
+const wrappers = new WeakMap();
+
+/**
+ * Get private data.
+ * @param {Event} event The event object to get private data.
+ * @returns {PrivateData} The private data of the event.
+ * @private
+ */
+function pd(event) {
+    const retv = privateData.get(event);
+    console.assert(
+        retv != null,
+        "'this' is expected an Event object, but got",
+        event
+    );
+    return retv
+}
+
+/**
+ * https://dom.spec.whatwg.org/#set-the-canceled-flag
+ * @param data {PrivateData} private data.
+ */
+function setCancelFlag(data) {
+    if (data.passiveListener != null) {
+        if (
+            typeof console !== "undefined" &&
+            typeof console.error === "function"
+        ) {
+            console.error(
+                "Unable to preventDefault inside passive event listener invocation.",
+                data.passiveListener
+            );
+        }
+        return
+    }
+    if (!data.event.cancelable) {
+        return
+    }
+
+    data.canceled = true;
+    if (typeof data.event.preventDefault === "function") {
+        data.event.preventDefault();
+    }
+}
+
+/**
+ * @see https://dom.spec.whatwg.org/#interface-event
+ * @private
+ */
+/**
+ * The event wrapper.
+ * @constructor
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Event|{type:string}} event The original event to wrap.
+ */
+function Event(eventTarget, event) {
+    privateData.set(this, {
+        eventTarget,
+        event,
+        eventPhase: 2,
+        currentTarget: eventTarget,
+        canceled: false,
+        stopped: false,
+        immediateStopped: false,
+        passiveListener: null,
+        timeStamp: event.timeStamp || Date.now(),
+    });
+
+    // https://heycam.github.io/webidl/#Unforgeable
+    Object.defineProperty(this, "isTrusted", { value: false, enumerable: true });
+
+    // Define accessors
+    const keys = Object.keys(event);
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in this)) {
+            Object.defineProperty(this, key, defineRedirectDescriptor(key));
+        }
+    }
+}
+
+// Should be enumerable, but class methods are not enumerable.
+Event.prototype = {
+    /**
+     * The type of this event.
+     * @type {string}
+     */
+    get type() {
+        return pd(this).event.type
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get target() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get currentTarget() {
+        return pd(this).currentTarget
+    },
+
+    /**
+     * @returns {EventTarget[]} The composed path of this event.
+     */
+    composedPath() {
+        const currentTarget = pd(this).currentTarget;
+        if (currentTarget == null) {
+            return []
+        }
+        return [currentTarget]
+    },
+
+    /**
+     * Constant of NONE.
+     * @type {number}
+     */
+    get NONE() {
+        return 0
+    },
+
+    /**
+     * Constant of CAPTURING_PHASE.
+     * @type {number}
+     */
+    get CAPTURING_PHASE() {
+        return 1
+    },
+
+    /**
+     * Constant of AT_TARGET.
+     * @type {number}
+     */
+    get AT_TARGET() {
+        return 2
+    },
+
+    /**
+     * Constant of BUBBLING_PHASE.
+     * @type {number}
+     */
+    get BUBBLING_PHASE() {
+        return 3
+    },
+
+    /**
+     * The target of this event.
+     * @type {number}
+     */
+    get eventPhase() {
+        return pd(this).eventPhase
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopPropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.stopPropagation === "function") {
+            data.event.stopPropagation();
+        }
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopImmediatePropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        data.immediateStopped = true;
+        if (typeof data.event.stopImmediatePropagation === "function") {
+            data.event.stopImmediatePropagation();
+        }
+    },
+
+    /**
+     * The flag to be bubbling.
+     * @type {boolean}
+     */
+    get bubbles() {
+        return Boolean(pd(this).event.bubbles)
+    },
+
+    /**
+     * The flag to be cancelable.
+     * @type {boolean}
+     */
+    get cancelable() {
+        return Boolean(pd(this).event.cancelable)
+    },
+
+    /**
+     * Cancel this event.
+     * @returns {void}
+     */
+    preventDefault() {
+        setCancelFlag(pd(this));
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     */
+    get defaultPrevented() {
+        return pd(this).canceled
+    },
+
+    /**
+     * The flag to be composed.
+     * @type {boolean}
+     */
+    get composed() {
+        return Boolean(pd(this).event.composed)
+    },
+
+    /**
+     * The unix time of this event.
+     * @type {number}
+     */
+    get timeStamp() {
+        return pd(this).timeStamp
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     * @deprecated
+     */
+    get srcElement() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The flag to stop event bubbling.
+     * @type {boolean}
+     * @deprecated
+     */
+    get cancelBubble() {
+        return pd(this).stopped
+    },
+    set cancelBubble(value) {
+        if (!value) {
+            return
+        }
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.cancelBubble === "boolean") {
+            data.event.cancelBubble = true;
+        }
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     * @deprecated
+     */
+    get returnValue() {
+        return !pd(this).canceled
+    },
+    set returnValue(value) {
+        if (!value) {
+            setCancelFlag(pd(this));
+        }
+    },
+
+    /**
+     * Initialize this event object. But do nothing under event dispatching.
+     * @param {string} type The event type.
+     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.
+     * @param {boolean} [cancelable=false] The flag to be possible to cancel.
+     * @deprecated
+     */
+    initEvent() {
+        // Do nothing.
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(Event.prototype, "constructor", {
+    value: Event,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `event instanceof window.Event` is `true`.
+if (typeof window !== "undefined" && typeof window.Event !== "undefined") {
+    Object.setPrototypeOf(Event.prototype, window.Event.prototype);
+
+    // Make association for wrappers.
+    wrappers.set(window.Event.prototype, Event);
+}
+
+/**
+ * Get the property descriptor to redirect a given property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to redirect the property.
+ * @private
+ */
+function defineRedirectDescriptor(key) {
+    return {
+        get() {
+            return pd(this).event[key]
+        },
+        set(value) {
+            pd(this).event[key] = value;
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Get the property descriptor to call a given method property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to call the method property.
+ * @private
+ */
+function defineCallDescriptor(key) {
+    return {
+        value() {
+            const event = pd(this).event;
+            return event[key].apply(event, arguments)
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define new wrapper class.
+ * @param {Function} BaseEvent The base wrapper class.
+ * @param {Object} proto The prototype of the original event.
+ * @returns {Function} The defined wrapper class.
+ * @private
+ */
+function defineWrapper(BaseEvent, proto) {
+    const keys = Object.keys(proto);
+    if (keys.length === 0) {
+        return BaseEvent
+    }
+
+    /** CustomEvent */
+    function CustomEvent(eventTarget, event) {
+        BaseEvent.call(this, eventTarget, event);
+    }
+
+    CustomEvent.prototype = Object.create(BaseEvent.prototype, {
+        constructor: { value: CustomEvent, configurable: true, writable: true },
+    });
+
+    // Define accessors.
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in BaseEvent.prototype)) {
+            const descriptor = Object.getOwnPropertyDescriptor(proto, key);
+            const isFunc = typeof descriptor.value === "function";
+            Object.defineProperty(
+                CustomEvent.prototype,
+                key,
+                isFunc
+                    ? defineCallDescriptor(key)
+                    : defineRedirectDescriptor(key)
+            );
+        }
+    }
+
+    return CustomEvent
+}
+
+/**
+ * Get the wrapper class of a given prototype.
+ * @param {Object} proto The prototype of the original event to get its wrapper.
+ * @returns {Function} The wrapper class.
+ * @private
+ */
+function getWrapper(proto) {
+    if (proto == null || proto === Object.prototype) {
+        return Event
+    }
+
+    let wrapper = wrappers.get(proto);
+    if (wrapper == null) {
+        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto);
+        wrappers.set(proto, wrapper);
+    }
+    return wrapper
+}
+
+/**
+ * Wrap a given event to management a dispatching.
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Object} event The event to wrap.
+ * @returns {Event} The wrapper instance.
+ * @private
+ */
+function wrapEvent(eventTarget, event) {
+    const Wrapper = getWrapper(Object.getPrototypeOf(event));
+    return new Wrapper(eventTarget, event)
+}
+
+/**
+ * Get the immediateStopped flag of a given event.
+ * @param {Event} event The event to get.
+ * @returns {boolean} The flag to stop propagation immediately.
+ * @private
+ */
+function isStopped(event) {
+    return pd(event).immediateStopped
+}
+
+/**
+ * Set the current event phase of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {number} eventPhase New event phase.
+ * @returns {void}
+ * @private
+ */
+function setEventPhase(event, eventPhase) {
+    pd(event).eventPhase = eventPhase;
+}
+
+/**
+ * Set the current target of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {EventTarget|null} currentTarget New current target.
+ * @returns {void}
+ * @private
+ */
+function setCurrentTarget(event, currentTarget) {
+    pd(event).currentTarget = currentTarget;
+}
+
+/**
+ * Set a passive listener of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {Function|null} passiveListener New passive listener.
+ * @returns {void}
+ * @private
+ */
+function setPassiveListener(event, passiveListener) {
+    pd(event).passiveListener = passiveListener;
+}
+
+/**
+ * @typedef {object} ListenerNode
+ * @property {Function} listener
+ * @property {1|2|3} listenerType
+ * @property {boolean} passive
+ * @property {boolean} once
+ * @property {ListenerNode|null} next
+ * @private
+ */
+
+/**
+ * @type {WeakMap<object, Map<string, ListenerNode>>}
+ * @private
+ */
+const listenersMap = new WeakMap();
+
+// Listener types
+const CAPTURE = 1;
+const BUBBLE = 2;
+const ATTRIBUTE = 3;
+
+/**
+ * Check whether a given value is an object or not.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is an object.
+ */
+function isObject(x) {
+    return x !== null && typeof x === "object" //eslint-disable-line no-restricted-syntax
+}
+
+/**
+ * Get listeners.
+ * @param {EventTarget} eventTarget The event target to get.
+ * @returns {Map<string, ListenerNode>} The listeners.
+ * @private
+ */
+function getListeners(eventTarget) {
+    const listeners = listenersMap.get(eventTarget);
+    if (listeners == null) {
+        throw new TypeError(
+            "'this' is expected an EventTarget object, but got another value."
+        )
+    }
+    return listeners
+}
+
+/**
+ * Get the property descriptor for the event attribute of a given event.
+ * @param {string} eventName The event name to get property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor.
+ * @private
+ */
+function defineEventAttributeDescriptor(eventName) {
+    return {
+        get() {
+            const listeners = getListeners(this);
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    return node.listener
+                }
+                node = node.next;
+            }
+            return null
+        },
+
+        set(listener) {
+            if (typeof listener !== "function" && !isObject(listener)) {
+                listener = null; // eslint-disable-line no-param-reassign
+            }
+            const listeners = getListeners(this);
+
+            // Traverse to the tail while removing old value.
+            let prev = null;
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    // Remove old value.
+                    if (prev !== null) {
+                        prev.next = node.next;
+                    } else if (node.next !== null) {
+                        listeners.set(eventName, node.next);
+                    } else {
+                        listeners.delete(eventName);
+                    }
+                } else {
+                    prev = node;
+                }
+
+                node = node.next;
+            }
+
+            // Add new value.
+            if (listener !== null) {
+                const newNode = {
+                    listener,
+                    listenerType: ATTRIBUTE,
+                    passive: false,
+                    once: false,
+                    next: null,
+                };
+                if (prev === null) {
+                    listeners.set(eventName, newNode);
+                } else {
+                    prev.next = newNode;
+                }
+            }
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define an event attribute (e.g. `eventTarget.onclick`).
+ * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.
+ * @param {string} eventName The event name to define.
+ * @returns {void}
+ */
+function defineEventAttribute(eventTargetPrototype, eventName) {
+    Object.defineProperty(
+        eventTargetPrototype,
+        `on${eventName}`,
+        defineEventAttributeDescriptor(eventName)
+    );
+}
+
+/**
+ * Define a custom EventTarget with event attributes.
+ * @param {string[]} eventNames Event names for event attributes.
+ * @returns {EventTarget} The custom EventTarget.
+ * @private
+ */
+function defineCustomEventTarget(eventNames) {
+    /** CustomEventTarget */
+    function CustomEventTarget() {
+        EventTarget.call(this);
+    }
+
+    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {
+        constructor: {
+            value: CustomEventTarget,
+            configurable: true,
+            writable: true,
+        },
+    });
+
+    for (let i = 0; i < eventNames.length; ++i) {
+        defineEventAttribute(CustomEventTarget.prototype, eventNames[i]);
+    }
+
+    return CustomEventTarget
+}
+
+/**
+ * EventTarget.
+ *
+ * - This is constructor if no arguments.
+ * - This is a function which returns a CustomEventTarget constructor if there are arguments.
+ *
+ * For example:
+ *
+ *     class A extends EventTarget {}
+ *     class B extends EventTarget("message") {}
+ *     class C extends EventTarget("message", "error") {}
+ *     class D extends EventTarget(["message", "error"]) {}
+ */
+function EventTarget() {
+    /*eslint-disable consistent-return */
+    if (this instanceof EventTarget) {
+        listenersMap.set(this, new Map());
+        return
+    }
+    if (arguments.length === 1 && Array.isArray(arguments[0])) {
+        return defineCustomEventTarget(arguments[0])
+    }
+    if (arguments.length > 0) {
+        const types = new Array(arguments.length);
+        for (let i = 0; i < arguments.length; ++i) {
+            types[i] = arguments[i];
+        }
+        return defineCustomEventTarget(types)
+    }
+    throw new TypeError("Cannot call a class as a function")
+    /*eslint-enable consistent-return */
+}
+
+// Should be enumerable, but class methods are not enumerable.
+EventTarget.prototype = {
+    /**
+     * Add a given listener to this event target.
+     * @param {string} eventName The event name to add.
+     * @param {Function} listener The listener to add.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    addEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+        if (typeof listener !== "function" && !isObject(listener)) {
+            throw new TypeError("'listener' should be a function or an object.")
+        }
+
+        const listeners = getListeners(this);
+        const optionsIsObj = isObject(options);
+        const capture = optionsIsObj
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+        const newNode = {
+            listener,
+            listenerType,
+            passive: optionsIsObj && Boolean(options.passive),
+            once: optionsIsObj && Boolean(options.once),
+            next: null,
+        };
+
+        // Set it as the first node if the first node is null.
+        let node = listeners.get(eventName);
+        if (node === undefined) {
+            listeners.set(eventName, newNode);
+            return
+        }
+
+        // Traverse to the tail while checking duplication..
+        let prev = null;
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                // Should ignore duplication.
+                return
+            }
+            prev = node;
+            node = node.next;
+        }
+
+        // Add it.
+        prev.next = newNode;
+    },
+
+    /**
+     * Remove a given listener from this event target.
+     * @param {string} eventName The event name to remove.
+     * @param {Function} listener The listener to remove.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    removeEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+
+        const listeners = getListeners(this);
+        const capture = isObject(options)
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+
+        let prev = null;
+        let node = listeners.get(eventName);
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+                return
+            }
+
+            prev = node;
+            node = node.next;
+        }
+    },
+
+    /**
+     * Dispatch a given event.
+     * @param {Event|{type:string}} event The event to dispatch.
+     * @returns {boolean} `false` if canceled.
+     */
+    dispatchEvent(event) {
+        if (event == null || typeof event.type !== "string") {
+            throw new TypeError('"event.type" should be a string.')
+        }
+
+        // If listeners aren't registered, terminate.
+        const listeners = getListeners(this);
+        const eventName = event.type;
+        let node = listeners.get(eventName);
+        if (node == null) {
+            return true
+        }
+
+        // Since we cannot rewrite several properties, so wrap object.
+        const wrappedEvent = wrapEvent(this, event);
+
+        // This doesn't process capturing phase and bubbling phase.
+        // This isn't participating in a tree.
+        let prev = null;
+        while (node != null) {
+            // Remove this listener if it's once
+            if (node.once) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+            } else {
+                prev = node;
+            }
+
+            // Call this listener
+            setPassiveListener(
+                wrappedEvent,
+                node.passive ? node.listener : null
+            );
+            if (typeof node.listener === "function") {
+                try {
+                    node.listener.call(this, wrappedEvent);
+                } catch (err) {
+                    if (
+                        typeof console !== "undefined" &&
+                        typeof console.error === "function"
+                    ) {
+                        console.error(err);
+                    }
+                }
+            } else if (
+                node.listenerType !== ATTRIBUTE &&
+                typeof node.listener.handleEvent === "function"
+            ) {
+                node.listener.handleEvent(wrappedEvent);
+            }
+
+            // Break if `event.stopImmediatePropagation` was called.
+            if (isStopped(wrappedEvent)) {
+                break
+            }
+
+            node = node.next;
+        }
+        setPassiveListener(wrappedEvent, null);
+        setEventPhase(wrappedEvent, 0);
+        setCurrentTarget(wrappedEvent, null);
+
+        return !wrappedEvent.defaultPrevented
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(EventTarget.prototype, "constructor", {
+    value: EventTarget,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `eventTarget instanceof window.EventTarget` is `true`.
+if (
+    typeof window !== "undefined" &&
+    typeof window.EventTarget !== "undefined"
+) {
+    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype);
+}
+
+export default EventTarget;
+export { defineEventAttribute, EventTarget };
+//# sourceMappingURL=event-target-shim.mjs.map