Answers for "grab a data-role with javascript"

jquery set data attribute value

//<div id="myElementID" data-myvalue="37"></div>
var a = $('#myElementID').data('myvalue'); //get myvalue
$('#myElementID').data('myvalue',38); //set myvalue

jquery get data attribute

<a data-id="123">link</a>


var id = $(this).data("id"); // Will set id to 123