Here\'s a tricky one to start the morning.
I have a series of icons. When you click an icon it loads a form. Some of the forms have input[text] others have textareas
Here's A solution for bootstrap modals developed on top of that by @craztmatt and others. I have extended to have the selection of the target element start at the modal that triggered the event. This one catches inputs, textarea AND select elements.
// do this to make bootstrap modals auto-focus.
// delegate to body so that we only have to set it up once.
$('body').on('shown.bs.modal', function (e) {
var ele = $(e.target).find('input[type=text],textarea,select').filter(':visible:first'); // find the first input on the bs modal
if (ele) {ele.focus();} // if we found one then set focus.
})
Not precisely the OP's question but should be adaptable to a pure jquery case too.