It would be useful ability to set dom element attributes with custom method.

The current implementation uses $.attr() which has issues with case sensitive attributes.

I have HTML with embedded SVG:

<div>
  <svg viewBox="0 0 100 100"></svg>
</div>

And I want to bind attribute viewBox on svg element with stickit:

   bindings: {
        ':el': {
            attributes: [{
                name: 'viewBox',
                observe: ['width', 'height'],
                onGet: function(val) {
                    return '0 0 ' + val[0] + ' ' + val[1];
                }
            }]
        }
    }

This does not work as expected beacause it adds another attribute with name in lowcase:

 <svg viewBox="0 0 100 100" viewbox="0 0 100 100"></svg>

The name viewbox is meanless for SVG. The issue due method which jQuery.attr() function handles case sensitivity for attributes and this is "won't fix" http://bugs.jquery.com/ticket/11166

There is workaround to add attrHook to jQuery:

$.attrHooks.viewbox = {
    set: function(elem, value, name) {
        elem.setAttributeNS(null, 'viewBox', value + '');
        return value;
    }
};

But it seems to me that it is not too obvious. It would be nice abilty to customize DOM access methods at stickit binding level.