Methods to maintain the select2 dropdown event open while interacting with another select2 dropdown

I have a situation where I need to dynamically add a class to a div whenever a select2 dropdown is open. To achieve this functionality, I am utilizing the open and close events of select2. The current code successfully adds the class when opening a select2 dropdown and removing it when closing the same dropdown. However, the issue arises when attempting to open another select2 dropdown while one is already open. In this scenario, the close event is triggered instead of keeping the dropdown open. Here is the existing code snippet:

$('select').on('select2:open', function (e) {
    $('.a').addClass("header-index");
});
$('select').on('select2:close', function (e) {
    $('.a').removeClass("header-index");
});

How can I ensure that the close event is not triggered when a user attempts to open another select2 dropdown while one is already open?

javascriptjqueryhtmlcssjquery-select2

Answer №1

Give this method a try

$(".js-example-events").select2();

$('.js-example-events').on("select2:open", function () { alert(1); });
$('.js-example-events').on("select2:close", function () { alert(2); });

<select class="js-example-events">
<option>Choose</option>
<option>Choose1</option>
</select>

Visit this link for more information

Answer №2

Consider associating elements with unique identifiers

$('#element1').on('click', function (e) {
    $('.b').addClass("special-class");
});
$('#element2').on('mouseover', function (e) {
    $('.b').removeClass("special-class");
});

Alternatively, connect elements based on their position

$('element')[0].on('click', function (e) {
    $('.b').addClass("special-class");
});
$('element')[1].on('mouseout', function (e) {
    $('.b').removeClass("special-class");
});

Answer №3

You have the option to utilize filter() along with select2('isOpen')

$('select').select2()

$(document).on('select2:open select2:close', function(e) {
  let opened = $('select').filter(function() {
    return $(this).select2('isOpen')
  }).length
  
  $('.a').toggleClass('header-index', Boolean(opened));
});
.header-index {
  color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.2/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.2/js/select2.min.js"></script>

<div class="a">header-index</div>

<select style="width: 300px">
  <option value="JAN">January</option>
  <option value="FEB">February</option>
  <option value="MAR">March</option>
  <option value="APR">April</option>
  <option value="MAY">May</option>
  <option value="JUN">June</option>
  <option value="JUL">July</option>
  <option value="AUG">August</option>
  <option value="SEP">September</option>
  <option value="OCT">October</option>
  <option value="NOV">November</option>
  <option value="DEC">December</option>
</select>


<select style="width: 300px">
  <option value="JAN">January</option>
  <option value="FEB">February</option>
  <option value="MAR">March</option>
  <option value="APR">April</option>
  <option value="MAY">May</option>
  <option value="JUN">June</option>
  <option value="JUL">July</option>
  <option value="AUG">August</option>
  <option value="SEP">September</option>
  <option value="OCT">October</option>
  <option value="NOV">November</option>
  <option value="DEC">December</option>
</select>

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