Resetting Select2 value in dropdown with reset button

Question

What would be the best way to reset the selected item to default? I\'m using Select2 library and when using a normal button type=\"reset\", the value i

Answer 1

According to the latest version (select2 3.4.5) documented here, it would be as simple as:

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

Answer 2

I see three issues:

1. The display of the Select2 control is not refreshed when its value is changed due to a form reset.
2. The "All" option does not have a value attribute.
3. The "All" option is disabled.

First, I recommend that you use the setTimeout function to ensure that code is executed after the form reset is complete.

You could execute code when the button is clicked:

$('#searchclear').click(function() {
    setTimeout(function() {
        // Code goes here.
    }, 0);
});

Or when the form is reset:

$('form').on('reset', function() {
    setTimeout(function() {
        // Code goes here.
    }, 0);
});

As for what code to use:

Since the "All" option is disabled, the form reset does not make it the selected value. Therefore, you must explicitly set it to be the selected value. The way to do that is with the Select2 "val" function. And since the "All" option does not have a value attribute, its value is the same as its text, which is "All". Therefore, you should use the code given by thtsigma in the selected answer:

$("#d").select2('val', 'All');

If the attribute value="" were to be added to the "All" option, then you could use the code given by Daniel Dener:

$("#d").select2('val', '');

If the "All" option was not disabled, then you would just have to force the Select2 to refresh, in which case you could use:

$('#d').change();

Note: The following code by Lenart is a way to clear the selection, but it does not cause the "All" option to be selected:

$('#d').select2('data', null)

Answer 3

To achieve a generic solution, why not do this:

$(':reset').live('click', function(){
    var $r = $(this);
    setTimeout(function(){ 
        $r.closest('form').find('.select2-offscreen').trigger('change'); 
    }, 10);
});

This way: You'll not have to make a new logic for each select2 on your application.

And, you don't have to know the default value (which, by the way, does not have to be "" or even the first option)

Finally, setting the value to :selected would not always achieve a true reset, since the current selected might well have been set programmatically on the client, whereas the default action of the form select is to return input element values to the server-sent ones.

EDIT: Alternatively, considering the deprecated status of live, we could replace the first line with this:

$('form:has(:reset)').on('click', ':reset', function(){

or better still:

$('form:has(:reset)').on('reset', function(){

PS: I personally feel that resetting on reset, as well as triggering blur and focus events attached to the original select, are some of the most conspicuous "missing" features in select2!

Answer 4

Sometimes I want to reset Select2 but I can't without change() method. So my solution is :

function resetSelect2Wrapper(el, value){
    $(el).val(value);
    $(el).select2({
        minimumResultsForSearch: -1,
        language: "fr"
    });
}

Using :

resetSelect2Wrapper("#mySelectId", "myValue");

Answer 5

version 4.0

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

This is the correct solution from now on according to deprecated message thrown in debug mode: "The select2("val") method has been deprecated and will be removed in later Select2 versions. Use $element.val() instead"

Answer 6

What I found works well is as follows:

if you have a placeholder option like 'All' or '-Select-' and its the first option and that's that you want to set the value to when you 'reset' you can use

$('#id').select2('val',0);

0 is essentially the option that you want to set it to on reset. If you want to set it to the last option then get the length of options and set it that length - 1. Basically use the index of whatever option you want to set the select2 value to on reset.

If you don't have a placeholder and just want no text to appear in the field use:

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