HTML reset dropdown select menu to default value

Question

I have a select menu like this:

The first option tag is my placeholder and gets deactivated if I click the select menu.

$('select').each(function(){
    var $this = $(this), numberOfOptions = $(this).children('option').length;

    $this.addClass('select-hidden');
    $this.wrap('<div class="select"></div>');
    $this.after('<div class="select-styled"></div>');

    var $styledSelect = $this.next('div.select-styled');
    $styledSelect.text($this.children('option').eq(0).text());

    var $list = $('<ul />', {
        'class': 'select-options'
    }).insertAfter($styledSelect);

    for (var i = 0; i < numberOfOptions; i++) {
        $('<li />', {
            text: $this.children('option').eq(i).text(),
            rel: $this.children('option').eq(i).val()
        }).appendTo($list);
    }

    var $listItems = $list.children('li');

    $styledSelect.click(function(e) {
        e.stopPropagation();
        $('div.select-styled.active').not(this).each(function(){
            $(this).removeClass('active').next('ul.select-options').hide();
        });
        $(this).toggleClass('active').next('ul.select-options').toggle();
    });

    $listItems.click(function(e) {
        e.stopPropagation();
        $styledSelect.text($(this).text()).removeClass('active');
        $this.val($(this).attr('rel'));
        $list.hide();
        console.log($this.val());
    });

    $(document).click(function() {
        $styledSelect.removeClass('active');
        $list.hide();
    });

});

<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
<div class="dropdown">
    <select id="office-select">
        <option value="hide"><a>choose a number</a></option>
        <option value="1">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
        <option value="10">10</option>
        <option value="11">11</option>
        <option value="12">12</option>
        <option value="13">13</option>
        <option value="14">14</option>
        <option value="15">15</option>
    </select>
    <button class="resetbtn" type="submit">X</button>
</div>

Here is a working JSFiddle. Imagine we choose the number 6, then something is displayed on the bottom of the screen. After that I want to click the button to reset my select menu. So the text choose a number should be displayed as placeholder again.

Is this possible?

Answer 1

Once option selected, .select-options is hidden by .next('ul.select-options').hide();

You need to show it again on .resetbtn click

$('.resetbtn').click(function() {
    $('.select-styled').html("<a>choose a number</a>");
});