Problem on https://www.y8.com/games/dress_up_poland

[craniumcadoo]

The message

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ReferenceError: assignment to undeclared variable event

appears in the console, I think it relates to the below code and because of it the page does not load the game.

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        6115: function(e, t) {
            "use strict";
            ...
            var r = function() {
                return e = function e() {
                    ! function(e, t) {
                        if (!(e instanceof t)) throw new TypeError("Cannot call a class as a function")
                    }(this, e)
                }, ... {
                    key: "dispatchCustomEvent",
                    value: function() {
                        console.log("dispatching event preRollAdHidden"), event = new Event("preRollAdHidden"), document.dispatchEvent(event)
                    }
                }]) && i(e.prototype, t), n && i(e, n), Object.defineProperty(e, "prototype", {
                    writable: !1
                }), e;
                var e, t, n
            }();
            t.A = r
        },

[craniumcadoo]

Tested this snippet in the console on Pale Moon and Firefox

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"use strict";
try {
    event = new Event("testEvent");
    console.log("Assigned to event:", event);
} catch (e) {
    console.error("Error assigning to event:", e);
}

console.log("window.event =", window.event);

Pale Moon:

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Error assigning to event: ReferenceError: assignment to undeclared variable event
undefined

Firefox:

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Assigned to event: 
testEvent { target: null, isTrusted: false, eventPhase: 0, bubbles: false, cancelable: false, returnValue: true, defaultPrevented: false, composed: false, timeStamp: 127056, cancelBubble: false, … }
window.event = 
testEvent { target: null, isTrusted: false, eventPhase: 0, bubbles: false, cancelable: false, returnValue: true, defaultPrevented: false, composed: false, timeStamp: 127056, cancelBubble: false, … }

Also Firefox with this code:

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"use strict";
try {
    other = new Event("testEvent");
    console.log("Assigned to other:", other);
} catch (e) {
    console.error("Error assigning to other:", e);
}

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Error assigning to other: ReferenceError: assignment to undeclared variable other

Firefox appears to treat event as a legacy global in certain contexts, meaning it does not error out. Pale Moon already has the appropriate behavior for this for `name`, `status`, `length`, `parent`, `opener`, `frames`, `self` and likely others.

[vannilla]

window.event is officially deprecated and dates back to the times of Internet Explorer. It has many subtle issues and if code works is mostly by coincidence. It should not be used in new scripts. Pale Moon doesn't have this deprecated feature without changing a setting.

[FranklinDM]

The provided code works for me. See https://repo.palemoon.org/MoonchildProd ... ment-43556

Do note that global window event support is not enabled by default.