List.js scope conext for sort handler is missing

[jcyuan]

Phaser Version: v3.5.1, Phaser.Structs.List.js

sort: function (property)
{
    if (property)
    {
        this._sortKey = property;

        StableSort.inplace(this.list, this.sortHandler);
    }

    return this;
},
sortHandler: function (childA, childB)
{
    return childA[this._sortKey] - childB[this._sortKey];
},

as you can see, here it passes this.sortHandler to the StableSort.inplace function, but when later this handler is executed by the StableSort, the _sortKey is lost in the scope because this is pointed to the Window object.

[jcyuan]

btw, I think better to have an optional paramter customizedHandler for complex object sorting.

[photonstorm]

Thank you for submitting this issue. We have fixed this and the fix has been pushed to the master branch. It will be part of the next release. If you get time to build and test it for yourself we would appreciate that.