The JavaScript key event handler from http://theoldreader.com/, beautified by http://jsbeautifier.org/. I'm using this to illustrate the problem with keyboard shortcuts described here: http://theoldreader.uservoice.com/forums/187017-feature-requests/suggestions/3743414-keyboard-navigation-doesn-t-work-as-i-d-expect

the_old_reader_key_event_handler.js

trigger: function (e, t) {
    var n, r, i, s, o;
    t == null && (t = {}), Reader.Debug.log("[Shortcuts] trigger " + e);
    if ($(window).width() < 768 && ["j", "k"].indexOf(e) === -1) return !0;
    n = Reader.Contents.container, o = n.hasClass("slide") ? Reader.Contents.offset : n.scrollTop();
    switch (e) {
    case "space":
        return s = n.height() - o, i = n.scrollTop() + s, r = !1, $(".post").each(function (e, t) {
            var u, a;
            if (r) return;
            u = $(t).offset().top - o;
            if (u > 1 && u < s) {
                i = n.scrollTop() + u, r = !0, a = $(t).find("[data-list-toggle]");
                if (a.length > 0) return a.trigger("click"), i = n.scrollTop() + $(t).offset().top - o
            }
        }), Reader.Contents.scrollto({
            scrollTop: i
        }, 200), !1;
    case "shift-space":
        return s = -(n.height() - o), i = n.scrollTop() + s, r = !1, $(".post").each(function (e, t) {
            var u, a, f;
            if (r) return;
            u = $(t).offset().top - o;
            if (u < 0 && u > s) return i = n.scrollTop() + u;
            if (u > 1) return r = !0;
            a = $(t).prev(), f = a.find("[data-list-toggle]");
            if (f.length > 0) return f.trigger("click"), i = n.scrollTop() + a.offset().top - o
        }), Reader.Contents.scrollto({
            scrollTop: i
        }, 200), !1;
    case "shift-a":
        Reader.Contents.node.find(".read").trigger("click");
        break;
    case "j":
    case "n":
        return r = !1, i = n.scrollTop(), $(".post").each(function (t, s) {
            var u, a;
            if (r) return;
            u = $(s).offset().top - o;
            if (u > 1) {
                i = n.scrollTop() + u, r = !0, a = $(s).find("[data-list-toggle]");
                if (a.length > 0) return e === "j" && a.parent().find(".list-post").is(":hidden") ? (a.trigger("click"), i = null) : i = n.scrollTop() + $(s).offset().top - o
            }
        }), i && Reader.Contents.scrollto({
            scrollTop: i
        }, 200), !1;
    case "k":
    case "p":
        return r = !1, i = n.scrollTop(), $(".post").each(function (t, s) {
            var u, a, f;
            if (r) return;
            u = $(s).offset().top - o;
            if (u < 0) return i = n.scrollTop() + u;
            r = !0, a = $(s).prev(), f = a.find("[data-list-toggle]");
            if (f.length > 0) return e === "k" && f.parent().find(".list-post").is(":hidden") ? (f.trigger("click"), i = null) : i = n.scrollTop() + a.offset().top - o
        }), i && Reader.Contents.scrollto({
            scrollTop: i
        }, 200), !1;
    case "o":
    case "v":
    case "b":
    case "x":
    case "m":
    case "s":
    case "l":
    case "f":
    case "c":
        return r = !1, $(".post").each(function (t, n) {
            var i, s;
            if (r) return;
            s = $(n).offset().top + $(n).outerHeight() - o;
            if (s >= 0) {
                switch (e) {
                case "o":
                case "v":
                    window.open($(this).find("h3 a").attr("href"));
                    break;
                case "b":
                    i = document.createEvent("MouseEvents"), i.initMouseEvent("click", !0, !0, window, 0, 0, 0, 0, 0, !0, !1, !1, !0, 0, null), $(this).find("h3 a")[0].dispatchEvent(i);
                    break;
                case "x":
                    $(this).find("[data-list-toggle]").trigger("click");
                    break;
                case "m":
                    $(this).find(".btn-read").trigger("click");
                    break;
                case "s":
                    $(this).find(".btn-share").trigger("click");
                    break;
                case "l":
                    $(this).find(".btn-like").trigger("click");
                    break;
                case "f":
                    $(this).find(".btn-pocket").trigger("click");
                    break;
                case "c":
                    $(this).find(".comments .new .btn").trigger("click"), Reader.Contents.scrollto({
                        scrollTop: Reader.Contents.container.scrollTop() - Reader.Contents.offset + $(n).find(".comments").offset().top
                    }, 200)
                }
                return r = !0
            }
        }), !1
    }
    return !0
}