[JS] Check select2 jquery plugin loaded or not
Read How to async defer CSS JS perfectly if (jQuery.fn.select2) { //jquery select2 loaded or not false or not undefined => return array jQuery.fn.select2.defaults.set( "theme", "bootstrap" ); //then select themes } Example: How to change select2 jQuery plugin using jQuery.val() $('#mySelect2').val('US'); // Change the value or make some change to the internal state if (jQuery.fn.select2) { $('#mySelect2').trigger('change.select2'); // Notify only Select2 of changes }