layui动态下拉选为何数据都是undefined

Question

$.ajax({
url: '/handle/select',
dataType: 'json',
type: 'get',
success: function (data){
$.each(data, function (index, item){
$('#unit').append(' '+item.name+'')
});
layui.form.render("select");

Answer 1

$('#unit').trigger('change');