How to append an icon to selected item in select2?

Question 1

Simply replacing < by < in the option and removing format functions:

<select id="sel" style="width: 100%">
    <option value="1">Hello</option>
    <option value="2">Friends &lt;i class='fa fa-check'>&lt;/i></option>
    <option value="3">Stackoverflow</option>
</select>

You can test it here: http://jsbin.com/nasixuro/11/edit

Question 2

I think there's two ways to achieve that:

The first solution is the better one,

you can make it work just by defining an escapeMarkup function in select2 options, and this function must return the same data received as input parameter without any changes.

all what you need is:
```
$("#sel").select2({
    escapeMarkup: function(m) { 
       return m; 
    }
});
```
here's a working example: http://jsbin.com/nasixuro/3/edit

The second one, make a small changes in select2.js file.

after inspecting the select2.js, i found the function which updates the text, and there was a little problem, select2.js plugin escapes html to prevent js injection, so to get it work as you expect you have to avoid escaping html and use .html() function from jquery api to insert your html instead of .append() function used in updateSelection function of select2.js.

here's the function i'm talking about:

// single
updateSelection: function (data) {

    var container=this.selection.find(".select2-chosen"), formatted, cssClass;

    this.selection.data("select2-data", data);

    container.empty();
    if (data !== null) {
        formatted=this.opts.formatSelection(data, container, this.opts.escapeMarkup);
    }
    if (formatted !== undefined) {
        container.append(formatted);
    }
    cssClass=this.opts.formatSelectionCssClass(data, container);
    if (cssClass !== undefined) {
        container.addClass(cssClass);
    }

    this.selection.removeClass("select2-default");

    if (this.opts.allowClear && this.getPlaceholder() !== undefined) {
        this.container.addClass("select2-allowclear");
    }
},

delete this:

if (data !== null) {
     formatted=this.opts.formatSelection(data, container, this.opts.escapeMarkup);
}

and change:

if (formatted !== undefined) {
     container.append(formatted);
}

to:

if (data !== undefined) {
     container.html(data.text);
}

this is a dirty solution in my opinion.

For the Remove action use this js code:

$("#removeok").click(function() {

    actual_value= $("#sel").find(':selected').text(), 
    indexOk =actual_value.indexOf(" <i class='fa fa-check'></i>");
    if (indexOk > -1){
        newtext =actual_value.substring(0, indexOk);
        $("#sel").find(':selected').text(newtext).change();
        return;
    }

});

Question 3

Manbe you can use the select2 parameter : formatResult or formatSelection like below

$(document).ready(function () {

    $("#sel").select2();

    $("#addok").click(function() {
       $("#sel").select2({
          //formatResult: format
          formatSelection: format
          //escapeMarkup: function(m) { return m; }

       });
    });
});

function format(state) {
   if (!state.id) return state.text; 
   return "<i class='fa fa-check'></i>" + state.text;
}

JSBIN

Question 4

You need not do the DOM manipulation manually

var icon_checked = "<i class='fa fa-check'></i>";

function format(opt) {
    var selection = this.element.select2("val");

    if (opt.id === selection) {
        return opt.text + icon_checked;
    }
    return opt.text;
}   

$("#sel").select2({
    formatResult: format
});

Basically this.element returns you the select element instance, on which you can run .select2("val") to get the selected value.

Compare that with the id of the object, if it is true then give the HTML with checkbox else return plain text. I think this is what you were trying to achieve.

Here is a Working fiddle, I think this is what you were trying to acheive

Question 5

You can`t add tags inside option. Try to set option font as font-family: "myfontawesome", arial; and add special character instead css replacement.

Question 6

I think your problem is that you can't style values or add html to items that are in dropdown selects like you are trying to...it's pure text.

newtext = actual_value + "wat";

See how your fiddle works when I remove the html and just add plaintext:

I also might suggest looking here.

Question 7

If you want the icon to display, you need to target the HTML element and insert HTML not TEXT. pretty much like this:

$(document).ready(function () {

    $("#sel").select2();

    $("#addok").click(function() {
        actual_value = $("#sel").find(':selected').text();

        if (actual_value.indexOf(" <i class='fa fa-check'></i>") > -1){
            alert("asd")
            return
        }

        newtext = actual_value + "<i class='fa fa-check'></i>";
        $("#s2id_sel").find('.select2-chosen').html(newtext);
    });
});

See http://jsfiddle.net/S9tE3/

BUT. The HTML element you need to target, from what i can see, is $('s2id_'+[current element id]). s2 i guess for SELECT2 and id_. So your select is id="sel", which means $('s2id_sel'). Also note that you need to find which one is chosen. It, conveniently enough, has a ".select2-chosen" class which makes it kinda easy to target.

This won't change the value, just the LOOK which is I think what you're exactly trying to do.

Hope that helps

Question 8

Replace this code

  <select id="sel" style="width: 100%">
       <option value="1">Hello</option>
       <option value="2" data-icon="1">Friends</option>
       <option value="3">Stackoverflow</option>
  </select>

and put this code

<select id="sel" style="width: 100%">
       <option value="1">Hello</option>
       <option value="2">Friends</option>
       <option value="3">Stackoverflow</option>
  </select>

Question 9

I changed a little code to check your data-icon

   $("#addok").click(function() {
        actual_value = $("#sel").find(':selected').text();
       if($("#sel").find(':selected').data('icon') == '1')  
         {
           alert("asd");
           return}

Set data-icon = 0 to prevent it generate icon from format_select2_icon and remove icon.

 if($("#sel").find(':selected').data('icon') == '1')  {
          $("#sel").find(':selected').data('icon','0') ;
         $(".select2-chosen").text(actual_value).change();
        }

See: http://jsbin.com/nasixuro/18/edit

Hope that helped for you.

Question 10

With fontawesome icon, you can use the following :

.select2-results__option[aria-selected=true]::before {
    content: "\f0c9";
    font: normal normal normal 14px/1 FontAwesome;
    color: rbg(255,0,0);
}

There is text-equivalent of each icon : http://fortawesome.github.io/Font-Awesome/cheatsheet/

Or if you have gif for example, it works very well simply with your image as CSS background like this :

.select2-results__option[aria-selected=true] {
    background: url('path/to/image.gif') no-repeat 10px 10px;
}

Here is the result :

Question 11

With Bootstrap Glyphicons you can add the following to your CSS

.select2-results__option[aria-selected=true]::after {
    font-family: "Glyphicons Halflings";
    content: "\e013";
}

and glyphicon-ok will be appended to each selected item.

Look in Bootstrap cheatsheet for icon codes.