带有引导程序3的可滚动菜单 - 不应该扩展其容器的菜单?

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我怎样才能解决这个问题?有关与Bootstrap兼容的其他方法的建议也很赞赏!

<ul class="nav">
    <li class="dropdown">
        <a class="icon-key icon-white" data-toggle="dropdown" href="#" style=
        "font-weight: bold"></a>

        <div class="dropdown-menu" style="margin-left: 2em">
            <ul class="dropdown-menu">
                <!-- static non-scrollable menu header 1 -->
            </ul>
        </div>

        <div class="dropdown-menu" style="margin-left: 2em">
            <ul class="dropdown-menu">
                <li class="disabled">
                    <a href="#"><i class="icon-group"></i> <b>My Groups</b></a>
                </li>

                <li>
                    <div class="dropdown-menu scroll-menu scroll-menu-2x"
                    style="margin-left: 2em">
                        <ul class="dropdown-menu scroll-menu scroll-menu-2x">
                            <li>
                                <a href="#">User</a>
                            </li>

                            <li>
                                <a href="#">Administrators</a>
                            </li>

                            <li>
                                <a href="#">Some Other Group</a>
                            </li>
                        </ul>
                    </div>

                    <ul class="dropdown-menu scroll-menu scroll-menu-2x">
                        <!-- Additional menu items omitted for brevity -->
                    </ul>
                </li>
            </ul>
        </div>

        <div class="dropdown-menu" style="margin-left: 2em">
            <ul class="dropdown-menu">
                <!-- static non-scrollable menu header 2 -->
            </ul>
        </div>

        <div class="dropdown-menu" style="margin-left: 2em">
            <ul class="dropdown-menu">
                <li class="disabled">
                    <a href="#"><i class="icon-user"></i> <b>My Roles</b></a>
                </li>

                <li>
                    <div class="dropdown-menu scroll-menu scroll-menu-2x"
                    style="margin-left: 2em">
                        <ul class="dropdown-menu scroll-menu scroll-menu-2x">
                            <li>
                                <a href="#">Core Users</a>
                            </li>

                            <li>
                                <a href="#">Admin</a>
                            </li>

                            <li>
                                <a href="#">Some Other Role</a>
                            </li>
                        </ul>
                    </div>

                    <ul class="dropdown-menu scroll-menu scroll-menu-2x">
                        <!-- Additional menu items omitted for brevity -->
                    </ul>
                </li>
            </ul>
        </div>

        <div class="dropdown-menu" style="margin-left: 2em">
            <ul class="dropdown-menu">
                <!-- static non-scrollable menu footer -->
            </ul>
        </div>

        <ul class="dropdown-menu">
            <li class="disabled">
                <a href="#"><i class="icon-chevron-up pull-left"></i> <i class="icon-chevron-up pull-right"></i></a>
            </li>
        </ul>
    </li>
</ul>

和CSS:

/* So we wont impact the original bootstrap menu or it's pseudo call-out
arrow the menu is wrapped in a sub dropdown-menu with a chained scroll-menu */
ul.scroll-menu {
    position:relative;
    display:inherit!important;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    -moz-overflow-scrolling:touch;
    -ms-overflow-scrolling:touch;
    -o-overflow-scrolling:touch;
    overflow-scrolling:touch;
    top:0!important;
    left:0!important;
    width:100%;
    height:auto;
    max-height:500px;
    margin:0;
    border-left:none;
    border-right:none;
    -webkit-border-radius:0!important;
    -moz-border-radius:0!important;
    -ms-border-radius:0!important;
    -o-border-radius:0!important;
    border-radius:0!important;
    -webkit-box-shadow:none;
    -moz-box-shadow:none;
    -ms-box-shadow:none;
    -o-box-shadow:none;
    box-shadow:none
}
提问于
用户回答回答于

我认为你可以简化这个只需添加必要的CSS属性到你的特殊的可滚动菜单类。

CSS:

.scrollable-menu {
    height: auto;
    max-height: 200px;
    overflow-x: hidden;
}

HTML

            <ul class="dropdown-menu scrollable-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Action</a></li>
                ..
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
            </ul>
用户回答回答于

对于CSS,我发现在显示浏览器铬版时,手机横向320的最大高度为180更好。

.scrollable-menu {
    height: auto;
    max-height: 180px;
    overflow-x: hidden;
}

另外,为了添加可见的滚动条,这个CSS应该做到这一点:

.scrollable-menu::-webkit-scrollbar {
    -webkit-appearance: none;
    width: 4px;        
}    
.scrollable-menu::-webkit-scrollbar-thumb {
    border-radius: 3px;
    background-color: lightgray;
    -webkit-box-shadow: 0 0 1px rgba(255,255,255,.75);        
}

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