Adding custom tags style in Select2 MultiSelect Dropdown

Question

so I'm using Select2 4 library ( https://select2.github.io/ ) and I have a problem.

<select id="test" multiple style="width:800px;">
    <option value="a">aaaaa</option>
    <option value="b">bbbbb</option>
    <option value="c">cccc</option>
    <option value="d">ddddd</option>
</select>

(...)

$("#test").select2({
   tags: true,
   tokenSeparators: [',', ' ']
})

This is generating, after making some choices DOM element, which contains some <li> s

So - it works fine. But I need to add my classes to those <li> elements after changing. I don't know how to do that because Select2 rewrites my classes instantly after adding.

I've tried something like this:

selectEl.change(function() {
  var elements = $('.select2-selection > ul > li');
  elements.each(function() {
    $(this).addClass('my-test-class');
  });
});

but nothing changes (except for the last element, which is an input). I mean - I think it works, but Select2 instantly rewrites it.

I've tried doing it using change, select2:select listeners and none of those works fine.

The idea is - adding 'select2-auto' to <li> s that are chosen from the drop-down list, and 'select-manual' class to the others.

Answer 1

You can use templateSelection: for custom tags styles please find below snippet for your reference..

templateSelection: function(selection) {
        if(selection.selected) {
            return $.parseHTML('<span class="customclass">' + selection.text + '</span>');
        }
        else {
            return $.parseHTML('<span class="customclass">' + selection.text + '</span>');
        }
    }

 $("#test").select2({ tags: true, allowClear: true, // closeOnSelect: false, tokenSeparators: [',', ' '], templateSelection: function(selection) { if(selection.selected) { return $.parseHTML('<span class="customclass">' + selection.text + '</span>'); } else { return $.parseHTML('<span class="customclass">' + selection.text + '</span>'); } } }); $("#test").on("select2:select", function(e) { $("li[aria-selected='true']").addClass("customclass"); $("li[aria-selected='false']").removeClass("customclass"); $('.select2-search-choice:not(.my-custom-css)', this).addClass('my-custom-css'); }); $("#test").on("select2:unselect", function(e) { $("li[aria-selected='false']").removeClass("customclass"); }); 

 .selectRow { display : block; padding : 20px; } .select2-container { width: 200px; } .customclass { color:red; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script> <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet"/> <select id="test" multiple style="width:800px;"> <option value="a">aaaaa</option> <option value="b">bbbbb</option> <option value="c">cccc</option> <option value="d">ddddd</option> </select> 

Answer 2

dropdownCssClass Property use for adding class to the select2 drop-down menu. Something like this,

$("#test").select2({
     tags: true,
     tokenSeparators: [',', ' '],
     containerCssClass: "my-test-class",
     dropdownCssClass: "test-class"
 });

I hope this will work for you. Thanks.

Answer 3

 $("#test").select2({ tags: true, allowClear: true, // closeOnSelect: false, tokenSeparators: [',', ' '] }); $("#test").on({ "select2:select": function(e) { $("li[aria-selected='true']").addClass("customclass"); $("li[aria-selected='false']").removeClass("customclass"); }, "select2:opening": function(e) { setTimeout(function(){ $("li[aria-selected='true']").addClass("customclass"); $("li[aria-selected='false']").removeClass("customclass"); },0) }, "select2:unselect" : function(e) { $("li[aria-selected='false']").removeClass("customclass"); } }); 

 .selectRow { display : block; padding : 20px; } .select2-container { width: 200px; } .customclass { color:red; } 

 <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet"/> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.full.min.js"></script> <select id="test" multiple style="width:800px;"> <option value="a">aaaaa</option> <option value="b">bbbbb</option> <option value="c">cccc</option> <option value="d">ddddd</option> </select>