JQ下拉框的取值和赋值

                        <div class="col-md-4 mb-3">

                            <label class="form-label" for="Modal_Sex">性别</label>

                            <select class="custom-select" required="" id="Modal_Sex">

                                <option value="0">男</option>

                                <option value="1">女</option>

                            </select>

                        </div>

 

下拉框的赋值：$("#Modal_Sex").val(0)

下拉框的取值：sex = $("#Modal_Sex option:selected").text();