select 2 jquery code example

Example 1: jquery select2 multiple select all

$("#checkbox").click(function(){
    if($("#checkbox").is(':checked') ){
        $("select > option").prop("selected","selected");
    }else{
        $("select > option").removeAttr("selected");
     }
});

Example 2: select2 documentation

$('.js-example-basic-single').select2({
  placeholder: 'Select an option'
});