Update widget form after drag-and-drop (WP save bug)

I did battle with a similar situation recently. Ajax in widgets is no joke! Need to write some pretty crazy code to get things to work across instances. I’m not familiar with live query, but if you say it checks the DOM every second, I might have a less intense solution for you:

var get_widget_id = function ( selector ) {
    var selector, widget_id = false;
    var id_attr = $( selector ).closest( 'form' ).find( 'input[name="widget-id"]' ).val();
    if ( typeof( id_attr ) != 'undefined' ) {
        var parts = id_attr.split( '-' );
        widget_id = parts[parts.length-1];
    }
    return parseInt( widget_id );
};

You can pass this function a selector or jQuery object and it will return the instance ID of the current instance. I could find no other way around this issue. Glad to hear I’m not the only one 🙂