JS to fix the WP Delete User reassign dropdown

gistfile1.txt

jQuery(document).ready(function($) {
    // Hide the existing dropdown
    $('select[name="reassign_user"]').hide();

    // Create a new dropdown
    var $dropdown = $('<select id="your-admin-select2-users"></select>');
    $('select[name="reassign_user"]').after($dropdown);

    // Initialize Select2 and AJAX
    $dropdown.select2({
		width: '300px',
        ajax: {
            url: ajaxurl, // This is a variable that WordPress has already defined for us
            dataType: 'json',
            delay: 250,
            data: function (params) {
                return {
                    action: 'ajax_get_users', // This is the name of the function in your functions.php or plugin file
                    search: params.term // This is the text that the user has typed
                };
            },
            processResults: function (data) {
                return {
                    results: data
                };
            },
            cache: true
        },
        minimumInputLength: 2
    });

    // When a user is selected, update the value of the existing dropdown
    $dropdown.on('select2:select', function (e) {
        var data = e.params.data;
        $('select[name="reassign_user"]').val(data.id);
    });
});