ok cancel events for meteor

okcancel.js

////////// Helpers for in-place editing //////////
// Returns an event map that handles the "escape" and "return" keys and
// "blur" events on a text input (given by selector) and interprets them
// as "ok" or "cancel".
okCancelEvents = function(selector, callbacks) {
    var ok = callbacks.ok || function() {};
    var cancel = callbacks.cancel || function() {};

    var events = {};
    events['keyup ' + selector + ', keydown ' + selector] =
        function(evt) {
            if (evt.type === "keydown" && evt.which === 27) {
                // escape = cancel
                cancel.call(this, evt);

            } else if (evt.type === "keyup" && evt.which === 13 ||
                evt.type === "focusout") {
                // blur/return/enter = ok/submit if non-empty
                var value = String(evt.target.value || "");
                if (value)
                    ok.call(this, value, evt);
                else
                    cancel.call(this, evt);
            }
    };

    return events;
};