Data field

<div class="input-group">
    <label for="data-field">Veuillez préciser ...</label>
    <div class="inputData">
        <span class="inputData-moins">-</span>
        <input id="data-field" type="number" min="0" max="" value="1" step="1" class="inputData-input">
        <span class="inputData-plus">+</span>
    </div>
</div>

<script src="../../js/framework/jquery-3.4.1.min.js"></script>
<script>
    $(document).ready(function () {
        $('.inputData-moins').click(function () {
            var datafield = $(this).parents('.inputData').find('.inputData-input');
            datafield.val(parseInt(datafield.val()) - 1);
        });
        $('.inputData-plus').click(function () {
            var datafield = $(this).parents('.inputData').find('.inputData-input');
            datafield.val(parseInt(datafield.val()) + 1);
        });
    })
</script>