Example of js hooks

[goldenapples]

Example of js hook in post select ajax data, see discussion in #767 (comment)

With this in place, you would filter the data being sent with the ajax request something like

wp.shortcake.hooks.addFilter( 'shortcode_tag.attr.ajax-data', function addParams( response ) {
  response.date_query = $( date_query_field ).value;
  return response;
} )

and add any new arguments to the return value you want.