可滚动菜单与引导3 - 菜单扩展其容器，当它不应该 [英] Scrollable Menu with Bootstrap 3 - Menu expanding its container when it should not

问题描述

我尝试此方法（他们的小提琴）启用可滚动菜单与Bootstrap，但使用这种方法，可滚动菜单扩展其容器 - 小提琴 - 不可滚动的菜单，正确地，不这样做。

I tried this method (their fiddle) to enable scrollable menu with Bootstrap, but with that approach, the scrollable menu expands its container -- fiddle -- the non-scrollable menu, correctly, does not do this.

如何解决这个问题？

为了参考，这里是从第一个方法的小提琴的HTML：

For reference, here is the HTML from the first method's fiddle:

<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
}

推荐答案

我想你可以通过添加必要的CSS属性到你的特殊可滚动菜单类简化这个。

I think you can simplify this by just adding the necessary CSS properties to your special scrollable menu class..

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>

工作范例： http： //bootply.com/86116

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