In this tutorial, We will learn how to reset to show placeholder select2. JQuery Select2 reset then after show placeholder. 





Example:

<html lang="en">
    <head>
        <title>PHP Select2 Multiple Select Example Tutorial</title>
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha256-aAr2Zpq8MZ+YA/D6JtRD3xtrwpEz2IqOS+pWD/7XKIw=" crossorigin="anonymous" />
        <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha256-OFRAJNoaD8L3Br5lglV7VyLRf0itmoBzWUoM+Sji4/8=" crossorigin="anonymous"></script>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script>
        <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet" />
        <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script>
    </head>
    <body>
        <div class="row mt-5">
            <div class="col-md-6 offset-3 mt-5">
                <div class="card">
                    <div class="card-header bg-info text-white">
                        <h6>Select2 Multiple Selected Get Value and Text Example</h6>
                    </div>
                    <div class="card-body" style="height: 300px;">
                        <div class="row mb-2">
                            <div class="data-response col-md-12" style="display: none;">
                                <div class="alert alert-success"></div>
                            </div>
                        </div>
                        <form method="POST">
                            <div class="form-group">
                                <label>Category :</label>
                                <select class="category form-control" name="category[]" multiple>
                                    <option value="1">Laravel</option>
                                    <option value="2">Jquery</option>
                                    <option value="3">PHP</option>
                                    <option value="4">React</option>
                                    <option value="5">Jquery ui</option>
                                    <option value="6">Android</option>
                                    <option value="7">React Native</option>
                                    <option value="8">Vue js</option>
                                    <option value="9">Bootstrap 4</option>
                                </select>
                            </div>
                            <div class="form-group">
                                <button class="btn btn-success store-data btn-sm">Save</button>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </div>
        <script type="text/javascript">
            $(document).ready(function () {
                $('.category').select2({
                    placeholder: "Select Category",
                    allowClear: true // This is for clear get the clear button if wanted
                });

            });
        </script>
    </body>
</html>

Thanks, May this example will help you...