borisyankov/DefinitelyTyped — pull request #555 by thomasandersen (2013-05-16 08:59:34+00:00)
Title: Added placeholder to SortableUIParams

Even if the jQuery UI docs says nothing about the placeholder property in the ui argument, it really exists in all sortable event callbacks.

$('element').sortable({
start: function (event, ui) {
console.log(ui.placeholder);
}
})