Reset select2 value and show placeholder

Question

How do I set the placeholder on value reset by select2. In my example If locations or grade select boxes are clicked and my select2 has a value than the value of select2 should reset and show the default placeholder. This script is resetting the value but won't show the placeholder

$("#locations, #grade ").change(function() {
   $('#e6').select2('data', {
     placeholder: "Studiengang wählen",
     id: null,
     text: ''
   });
});

$("#e6").select2({
   placeholder: "Studiengang wählen",
   width: 'resolve',
   id: function(e) {
     return e.subject;
   },
   minimumInputLength: 2,
   ajax: {
     url: "index.php?option=com_unis&task=search.locator&tmpl=component&<?php echo JSession::getFormToken() ?>=1",
     dataType: 'json',
     data: function(term, page) {
       return {
         q: term, // search term
         g: $('#grade option:selected').val(),
         o: $('#locations option:selected').val()
       };
     },
     results: function(data, page) {
       return {
         results: data
       };
     }
   },
   formatResult: subjectFormatResult,
   formatSelection: subjectFormatSelection,
   dropdownCssClass: "bigdrop",
   escapeMarkup: function(m) {
     return m;
   }
});

Answer 1

You must define the select2 as

$("#customers_select").select2({
    placeholder: "Select a customer",
    initSelection: function(element, callback) {                   
    }
});

To reset the select2

$("#customers_select").select2("val", "");

Answer 2

The accepted answer does not work in my case. I'm trying this, and it's working:

Define select2:

$("#customers_select").select2({
    placeholder: "Select a State",
    allowClear: true
});

or

$("#customers_select").select2({
    placeholder: "Select a State"
});

To reset:

$("#customers_select").val('').trigger('change')

or

$("#customers_select").empty().trigger('change')

Answer 3

Select2 has changed their API:

Select2: The select2("val") method has been deprecated and will be removed in later Select2 versions. Use $element.val() instead.

The best way to do this now is:

$('#your_select_input').val('');

Edit: December 2016 Comments suggest that the below is the updated way to do this:

$('#your_select_input').val([]);

Answer 4

The only thing can work for me is:

$('select2element').val(null).trigger("change")

I'm using version 4.0.3

Reference

According to Select2 Documentation

Answer 5

With Select2 version 4.0.9 this works for me:

$( "#myselect2" ).val('').trigger('change');

Answer 6

Select2 uses a specific CSS class, so an easy way to reset it is:

$('.select2-container').select2('val', '');

And you have the advantage of if you have multiple Select2 at the same form, all them will be reseted with this single command.

Answer 7

Use this :

$('.select').val([]).trigger('change');

Answer 8

TO REMOVE SELECTED VALUE

$('#employee_id').select2('val','');

---

TO CLEAR OPTION VALUES

$('#employee_id').html('');

Answer 9

I know this is kind of an old question, but this works for the select2 version 4.0

 $('#select2-element').val('').trigger('change');

or

$('#select2-element').val('').trigger('change.select2'); 

if you have change events bound to it

Answer 10

This is the correct way:

 $("#customers_select").val('').trigger('change');

I am using the latest release of Select2.

Answer 11

Use following to configure select2

    $('#selectelementid').select2({
        placeholder: "Please select an agent",
        allowClear: true // This is for clear get the clear button if wanted 
    });

And to clear select input programmatically

    $("#selectelementid").val("").trigger("change");
    $("#selectelementid").trigger("change");

Answer 12

I tried the above solutions but it didn't work for me.

This is kind of hack, where you do not have to trigger change.

$("select").select2('destroy').val("").select2();

or

$("select").each(function () { //added a each loop here
        $(this).select2('destroy').val("").select2();
});

Answer 13

Firstly you must define select2 like this:

$('#id').select2({
    placeholder: "Select groups...",
    allowClear: true,
    width: '100%',
})

To reset select2, simply you may use the following code block:

$("#id > option").removeAttr("selected");
$("#id").trigger("change");

Answer 14

You can clear te selection by

$('#object').empty();

But it wont turn you back to your placeholder.

So its a half solution

Answer 15

For users loading remote data, this will reset the select2 to the placeholder without firing off ajax. Works with v4.0.3:

$("#lstProducts").val("").trigger("change.select2");

Answer 16

So, to reset the form some of you will have a reset button. Add the following code inside the script tag

$('.your_btn_class').click(function(){
    $('#select_field_id').val([]);
    $("#select_field_id").select2({
    placeholder: "this is a placeholder",
    });
});

Or just to empty select field without keeping a placeholder:

$('.your_btn_class').click(function(){
    $('#select_field_id').val([]);
 });

Answer 17

For the place holder

$("#stateID").select2({
    placeholder: "Select a State"
});

To reset a select 2

$('#stateID').val('');
$('#stateID').trigger('change');

Hope this helps

Answer 18

Following the recommended way of doing it. Found in the documentation https://select2.github.io/options.html#my-first-option-is-being-displayed-instead-of-my-placeholder (this seems to be a fairly common issue):

When this happens it usually means that you do not have a blank <option></option> as the first option in your <select>.

as in:

<select>
   <option></option>
   <option value="foo">your option 1</option>
   <option value="bar">your option 2</option>
   <option value="etc">...</option>
</select>

Answer 19

I was also having this problem and it stems from val(null).trigger("change"); throwing a No select2/compat/inputData error before the placeholder gets reset. I solved it by catching the error and setting the placeholder directly (along with a width). Note: If you have more than one you will need to catch each one.

try{
    $("#sel_item_ID").select2().val(null).trigger("change");
}catch(err){
    console.debug(err)
}
try{
    $("#sel_location_ID").select2().val(null).trigger("change");
}catch(err){
    console.debug(err)
}
$('.select2-search__field')[0].placeholder='All Items';
$('.select2-search__field')[1].placeholder='All Locations';
$('.select2-search__field').width(173);

I'm running Select2 4.0.3

Answer 20

as of v.4.0.x...

to clear the values, but also restore the placeholder use...

.html('<option></option>');  // defaults to placeholder

if it's empty, it will select the first option item instead which may not be what you want

.html(''); // defaults to whatever item is first

frankly...Select2 is such a pain in the butt, it amazes me it hasn't been replaced.

Answer 21

After trying the first 10 solutions here and failing, I found this solution to work (see "nilov commented on Apr 7 • edited" comment down the page):

(function ($) {
   $.fn.refreshDataSelect2 = function (data) {
       this.select2('data', data);

       // Update options
       var $select = $(this[0]);
       var options = data.map(function(item) {
           return '<option value="' + item.id + '">' + item.text + '</option>';
       });
       $select.html(options.join('')).change();
   };
})(jQuery);

The change is then made:

var data = [{ id: 1, text: 'some value' }];
$('.js-some-field').refreshDataSelect2(data);

(The author originally showed var $select = $(this[1]);, which a commenter corrected to var $select = $(this[0]);, which I show above.)

Answer 22

From select2 website,

$("#mySelect2ControlId").val(null).trigger("change");

Answer 23

$("#customers_select").val([]).trigger('change')

this will remove values AND most important for me - it also remove an empty x button

Answer 24

I have tried above solutions but none worked with version 4x.

What i want to achieve is: clear all options but don't touch the placeholder. This code works for me.

selector.find('option:not(:first)').remove().trigger('change');

Answer 25

Using select2 version 3.2 this worked for me:

$('#select2').select2("data", "");

Didn't need to implement initSelection

Answer 26

$('myselectdropdown').select2('val', '0')

where 0 is your first value of the dropdown

Answer 27

Use this code into your js file

$('#id').val('1');
$('#id').trigger('change');

Answer 28

Before you clear the value using this $("#customers_select").select2("val", ""); Try setting focus to any other control on reset click.

This will show the placeholder again.

Answer 29

The DOM interface, already keeps track of the initial state...

So doing the following is enough:

$("#reset").on("click", function () {
    $('#my_select option').prop('selected', function() {
        return this.defaultSelected;
    });
});

Answer 30

Well whenever I did

$('myselectdropdown').select2('val', '').trigger('change');

I started getting some kind of lag after some three to four triggers. I suppose there's a memory leak. Its not within my code because if I do remove the this line, my app is lag free.

Since I have allowClear options set to true, I went with

$('.select2-selection__clear').trigger('mousedown');

This can be followed by a $('myselectdropdown').select2('close'); event trigger on the select2 dom element in case you wanna close the open suggestion drop down.