jQuery to perform a synchronous, rather than asynchronous

If you check the jQuery documentation: specify asynchronous option to be false to get synchronous Ajax request.

beforecreate: function (node, targetNode, type, to) {
    jQuery.ajax({
        url: 'http://example.com' + targetNode.id + '?name=' + encode(to.inp[0].value),
        success: function (result) {
            if (result.isOk == false) alert(result.message);
        },
        async: false
    });
}