Extends mousetrap.js to support passing a dictionary into bind method. Just include this js after you include mousetrap.

mousetrap-bind.js

/**
 * Overwrites default Mousetrap.bind method to optionally accept
 * an object to bind multiple key events in a single call
 *
 * You can pass it in like:
 *
 * Mousetrap.bind({
 *     'a': function() { console.log('a'); },
 *     'b': function() { console.log('b'); }
 * });
 *
 * And can optionally pass in 'keypress', 'keydown', or 'keyup'
 * as a second argument
 */
Mousetrap = (function(Mousetrap) {
    var self = Mousetrap,
        _oldBind = self.bind,
        args;

    self.bind = function() {
        args = arguments;

        // normal call
        if (typeof args[0] == 'string' || args[0] instanceof Array) {
            return _oldBind(args[0], args[1], args[2]);
        }

        // object passed in
        for (var key in args[0]) {
            if (args[0].hasOwnProperty(key)) {
                _oldBind(key, args[0][key], args[1]);
            }
        }
    };

    return self;
}) (Mousetrap);

mousetrap-bind.min.js

Mousetrap=function(b){var c=b.bind,a;b.bind=function(){a=arguments;if("string"==typeof a[0]||a[0]instanceof Array)return c(a[0],a[1],a[2]);for(var b in a[0])a[0].hasOwnProperty(b)&&c(b,a[0][b],a[1])};return b}(Mousetrap);

missing "return this" after binding dictionary.