引导模态-后台问题

Question

我在引导模态背景方面遇到问题。 模态本身可以正常工作，但是背景没有变灰，请参见下图。

模态的代码是：

<div class="modal fade" id="issuesModal" tabindex="-1" role="dialog" aria-
labelledby="exampleModalLabel" aria-hidden="true" data-backdrop="static">
    <div class="modal-dialog modal-md modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-header" style="background-color:#0066b2;color:#FFFFFF">
                <h5 class="modal-title" id="exampleModalLabel"></h5>
            </div>
            <div class="modal-body">
                <div class="container-fluid">
                    <div class="row">
                        <div class="col-6 col-lg-3 col-form-label">
                            ...
                        </div>
                        <div class="col-lg-9 form-text">
                            ...
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-6 col-lg-3 col-form-label">
                            ...
                        </div>
                        <div class="col-lg-9 form-text">
                            ...
                        </div>
                    </div>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-primary">OK</button>
                <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>

有任何想法吗？ 谢谢！

Answer 1

我无法重现该问题，我使用了您的HTML，它似乎可以正常工作

给其他人注意，我仅添加了此答案以向OP显示其HTML作品-OP发布最小，完整，可验证的示例后，我将删除答案

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous"> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script> <!-- Button trigger modal --> <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#issuesModal"> Launch demo modal </button> <!-- Modal --> <div class="modal fade" id="issuesModal" tabindex="-1" role="dialog" aria- labelledby="exampleModalLabel" aria-hidden="true" data-backdrop="static"> <div class="modal-dialog modal-md modal-dialog-centered" role="document"> <div class="modal-content"> <div class="modal-header" style="background-color:#0066b2;color:#FFFFFF"> <h5 class="modal-title" id="exampleModalLabel"></h5> </div> <div class="modal-body"> <div class="container-fluid"> <div class="row"> <div class="col-6 col-lg-3 col-form-label"> ... </div> <div class="col-lg-9 form-text"> ... </div> </div> <div class="row"> <div class="col-6 col-lg-3 col-form-label"> ... </div> <div class="col-lg-9 form-text"> ... </div> </div> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary">OK</button> <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button> </div> </div> </div> </div>