jQuery(document).ready(function($) {
    if(null === document.querySelector('select') && document.querySelector('select').length > 0) {
        var selectPlaceholder = 'Choose an option.';
        if(document.querySelector('select').hasAttribute('placeholder')) {
            selectPlaceholder = document.querySelector('select').getAttribute('placeholder');
        }
        jQuery('select').prepend('<option/>').select2({
            placeholder: selectPlaceholder,
            minimumResultsForSearch: Infinity,
            theme: 'default'
        });

    }
});