引导边条在不应该崩溃时崩溃，而不是在不应该崩溃时崩溃

Question

在MVC项目中有一个Sidebar，它是从DB创建的，并作为HTML注入视图。

总的来说，除了两个恼人的特性外，它还能很好地工作。

1. 如果打开子菜单项，如果打开另一个菜单项，则不会折叠。
2. 如果单击一个子菜单项目，它会在应该保持打开的时候崩溃。

这是另一回事

这可能是一个简单的CSS问题，但是在经历了这个问题之后，没有什么可以跳出来的。

生成的HTML是

div class="nav-side-menu">
    <div class="brand">Band Name</div>
    <i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"></i>
    <div class="menu-list">
        <ul id="menu-content" class="menu-content collapse out">
            <li data-toggle="collapse" class="collapsed active"><a href="#1"><i class="fa fa-gift fa-lg"></i>Overview<span class="arrow"></span></a></li>
            <li data-toggle="collapse" class="collapsed active"><a href="#2"><i class="fa fa-gift fa-lg"></i>Terms of Use (Licence)<span class="arrow"></span></a></li>
            <li data-toggle="collapse" class="collapsed active"><a href="#3"><i class="fa fa-gift fa-lg"></i>System Requirements<span class="arrow"></span></a></li>
            <li data-toggle="collapse" class="collapsed active"><a href="#4"><i class="fa fa-gift fa-lg"></i>Installation<span class="arrow"></span></a></li>
            <li data-toggle="collapse" data-target="#5" class="collapsed active">
                <a><i class="dropdown-toggle" data-toggle="dropdown"></i>Message Centre  <span class="caret" ></span></a>
                <ul class="sub-menu collapse" id="5">
                    <li><a href="#6">News</a></li>
                    <li><a href="#7">Communications</a></li>
                </ul>
            </li>
            <li data-toggle="collapse" data-target="#8" class="collapsed active">
                <a><i class="dropdown-toggle" data-toggle="dropdown"></i>Website  <span class="caret"></span></a>
                <ul class="sub-menu collapse" id="8">
                    <li><a href="#9">Login</a></li>
                </ul>
            </li>
        </ul>
    </div>
</div>

CSS是

<style>
    .nav-side-menu {
        overflow: auto;
        font-family: verdana;
        font-size: 12px;
        font-weight: 200;
        background-color: #2e353d;
        position: fixed;
        top: 0px;
        width: 300px;
        height: 100%;
        color: #e1ffff;
    }

        .nav-side-menu .brand {
            background-color: #23282e;
            line-height: 50px;
            display: block;
            text-align: center;
            font-size: 14px;
        }

        .nav-side-menu .toggle-btn {
            display: none;
        }

        .nav-side-menu ul,
        .nav-side-menu li {
            list-style: none;
            padding: 0px;
            margin: 0px;
            line-height: 35px;
            cursor: pointer;

        }

            .nav-side-menu ul :not(collapsed) .arrow:before,
            .nav-side-menu li :not(collapsed) .arrow:before {
                font-family: FontAwesome;
                content: "\f078";
                display: inline-block;
                padding-left: 10px;
                padding-right: 10px;
                vertical-align: middle;
                float: right;
            }

            .nav-side-menu ul .active,
            .nav-side-menu li .active {
                border-left: 3px solid #d19b3d;
                background-color: #4f5b69;
            }

            .nav-side-menu ul .sub-menu li.active,
            .nav-side-menu li .sub-menu li.active {
                color: #d19b3d;
            }

                .nav-side-menu ul .sub-menu li.active a,
                .nav-side-menu li .sub-menu li.active a {
                    color: #d19b3d;
                }

            .nav-side-menu ul .sub-menu li,
            .nav-side-menu li .sub-menu li {
                background-color: #181c20;
                border: none;
                line-height: 28px;
                border-bottom: 1px solid #23282e;
                margin-left: 0px;
            }

                .nav-side-menu ul .sub-menu li:hover,
                .nav-side-menu li .sub-menu li:hover {
                    background-color: #020203;
                }

                .nav-side-menu ul .sub-menu li:before,
                .nav-side-menu li .sub-menu li:before {
                    font-family: FontAwesome;
                    content: "\f105";
                    display: inline-block;
                    padding-left: 10px;
                    padding-right: 10px;
                    vertical-align: middle;
                }

        .nav-side-menu li {
            padding-left: 0px;
            border-left: 3px solid #2e353d;
            border-bottom: 1px solid #23282e;
        }

            .nav-side-menu li a {
                text-decoration: none;
                color: #e1ffff;
            }

                .nav-side-menu li a i {
                    padding-left: 10px;
                    width: 20px;
                    padding-right: 20px;
                }

            .nav-side-menu li:hover {
                border-left: 3px solid #d19b3d;
                background-color: #4f5b69;
                -webkit-transition: all 1s ease;
                -moz-transition: all 1s ease;
                -o-transition: all 1s ease;
                -ms-transition: all 1s ease;
                transition: all 1s ease;
            }

    @media (max-width: 767px) {
        .nav-side-menu {
            position: relative;
            width: 100%;
            margin-bottom: 10px;
        }

            .nav-side-menu .toggle-btn {
                display: block;
                cursor: pointer;
                position: absolute;
                right: 10px;
                top: 10px;
                z-index: 10 !important;
                padding: 3px;
                background-color: #ffffff;
                color: #000;
                width: 40px;
                text-align: center;
            }

        .brand {
            text-align: left !important;
            font-size: 22px;
            padding-left: 20px;
            line-height: 50px !important;
        }
    }

    @media (min-width: 767px) {
        .nav-side-menu .menu-list .menu-content {
            display: block;
        }

        #main {
            width: calc(100% - 300px);
            float: right;
        }
    }

    body {
        margin: 0px;
        padding: 0px;
    }
</style>

Answer 1

对于第一个问题，您可以简单地用id包装菜单中的手风琴部分：

<div class="accordion-group">

然后添加以下JS代码来修复手风琴问题：

/* ensure any open panels are closed before showing selected */
$('.accordion-group').on('show.bs.collapse', function () {
  $('.accordion-group .in').collapse('hide');
});

对于第二个问题，您只需要将data-toggle="collapse"和data-target="#5"移动到子菜单的a元素，这样锚点是唯一能够切换折叠的东西(而不是包含其所有内容的整个列表项)。

<li class="collapsed active">
  <a data-toggle="collapse" data-target="#5"><i></i>Message Centre  <span class="caret" ></span></a>
 ...
</li>

演示：JSFiddle