cannot read property 'id' of undefined select2

Question

I used Select2 4.0.6, I have a bug like below:

allowClear gives \"Uncaught TypeError: Cannot read property \'id\' of undefined\" when used on select.

How can I f

Answer 1

In my case data-placeholder helped as shown below:

Select element:

    Manager 1
    Manager 2

JS:

$('.select2').each(function(){
    var select = $(this);
    select.select2({
         width: '100%',
         allowClear: !select.prop('required'),
         language: {
            noResults: function () {
                return "{{ __('No results found') }}";
            }
        }
    });
});