As far as i get it from the code here https://github.com/bluedynamics/bdajax/blob/master/src/bdajax/resources/bdajax.js#L147 there is no support for an HTTP POST request. This would come in handy to disallow GET for some cases where one wants more security (post cant be packed in an URL).

This should be easy to add, since $.ajax settings has a {method: "post"} setting. https://api.jquery.com/jquery.ajax/#jQuery-ajax-settings

When loading JavaScript with <script src="..." async="async"/> then those are loaded while the DOM tree is still parsed and eventually afterwards. document.ready is thrown when the DOM tree is loaded and eventually before the async scripts are finished loading.
Currently bdajax and the shop bundles are not ready to be loaded asynchronously because document.ready is always loaded on top of the JavaScript resources - before the code they try to initialize is actually loaded.

With async loading, this line errors with Cannot set "spinner" on undefined (or similar):
https://github.com/bluedynamics/bdajax/blob/master/src/bdajax/resources/bdajax.js#L20

The whole document.ready needs to be moved to to the end of the script before })(jQuery); in line 798. For bdajax and all other shop scripts.

Then async="async" works nicely.

Currently there some divs (ajax-form,ajax-overlays.etc) defined in bdajax.pt. They are put into the template inside

Currently, bdajax:overlay uses the overlay implementation from jquerytools. We should wrap bdajax internal overlay calls into a dedicated API and make the concrete overlay implementation pluggable. Thus some can use the overlay/dialog implementation from bootstrap, jqueryui, jquerytools, etc

According with https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith IE does not support startsWith function, in fact I'm getting an error in bdajax.js in parseurl function.

We should move to using HTML5 data attributes instead of working in our own XML namespace, e.g. ajax:bind="..." becomes data-ajax-bind="...".

The XML namespace interpretation should be kept some time for migration purposes.