html - 如何修复不存在滚动条的堆叠式大型菜单

Question

基本上，当您缩小选项卡的大小以充当响应式网站时，我已经堆叠了大型菜单选项。但是，您无法滚动查看大型菜单中的其他选项。我该如何解决这个问题。

例子:

您可以看到我无法滚动查看大型菜单中的其他选项。

.navBar {
    font-family: Arial;
    background-color: #333;
    overflow: hidden;
}

.navBar > a {
    float: left;
    font-size: 12px;
    color: #FFF;
    text-align: center;
    padding: 6px 12px;
    text-decoration: none;
}

.menuDropDown {
    float: left;
    overflow: hidden;
}

.menuDropDown > #menuButton {
    font-size: 12px;
    border: none;
    outline: none;
    color: #FFF;
    padding: 6px 12px;
    background-color: inherit;
    font: inherit;
    margin: 0;
}

#menuButton:hover, .navBar > .menuDropDown:hover > #menuButton {
    background-color: #CCC;
    color: #1B315E;
}

.menuContent {
    display: none;
    position: absolute;
    background-color: none;
    width: 100%;
    left: 0;
    z-index: 1;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.menuDropDown:hover > .menuContent {
    display: block;
}

.menuColumn {
    float: left;
    width: 25%;
    padding: 10px;
    background-color: #CCC;
    height: 250px;
    overflow-y: auto;
}

#menuColumnHeader {
    color: #1B315E;
}

.menuColumn > a {
    float: none;
    color: #1B315E;
    padding: 12px;
    text-decoration: none;
    display: block;
    text-align: left;
    font-size: 14px;
}

.menuColumn > a:hover {
    background-color: #DDD;
}

.menuRow:after {
    content: "";
    display: table;
    clear: both;
}

@media screen and (max-width: 600px) {
    .menuColumn {
        width: 100%;
        height: auto;
    }
}

     <div class="navBar">
        <div class="menuDropDown">
            <button id="menuButton" title="Site Navigation"><i class="fas fa-bars"></i> Menu</button>
            <div class="menuContent">
            <div class="menuRow">
                <div class="menuColumn">
                    <h5 id="menuColumnHeader" title="Home Workspace">Home Workspace</h5>
                    <a href="#" title="Welcome"><i class="fas fa-exclamation-circle"></i> Welcome</a>
                    <a href="#" title="Timetable"><i class="far fa-calendar-alt"></i> Timetable</a>
                    <a href="#" title="Help"><i class="fa fa-question-circle"></i> Help</a>
                    <a href="#" title="Dashboard"><i class="fas fa-chart-line"></i> Dashboard</a>
                </div>
                <div class="menuColumn">
                </div>
                <div class="menuColumn">
                </div>
                <div class="menuColumn">
                </div>
                </div>
            </div>
            </div>
        </div>

谢谢， 汤姆

Answer 1

您可以根据屏幕高度添加一个max-height并启用滚动:

.navBar {
    font-family: Arial;
    background-color: #333;
    overflow: hidden;
}

.navBar > a {
    float: left;
    font-size: 12px;
    color: #FFF;
    text-align: center;
    padding: 6px 12px;
    text-decoration: none;
}

.menuDropDown {
    float: left;
    overflow: hidden;
}

.menuDropDown > #menuButton {
    font-size: 12px;
    border: none;
    outline: none;
    color: #FFF;
    padding: 6px 12px;
    background-color: inherit;
    font: inherit;
    margin: 0;
}

#menuButton:hover, .navBar > .menuDropDown:hover > #menuButton {
    background-color: #CCC;
    color: #1B315E;
}

.menuContent {
    display: none;
    position: absolute;
    background-color: none;
    width: 100%;
    left: 0;
    z-index: 1;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    max-height:100vh;
    overflow:auto;
}

.menuDropDown:hover > .menuContent {
    display: block;
}

.menuColumn {
    float: left;
    width: 25%;
    padding: 10px;
    background-color: #CCC;
    height: 250px;
    overflow-y: auto;
}

#menuColumnHeader {
    color: #1B315E;
}

.menuColumn > a {
    float: none;
    color: #1B315E;
    padding: 12px;
    text-decoration: none;
    display: block;
    text-align: left;
    font-size: 14px;
}

.menuColumn > a:hover {
    background-color: #DDD;
}

.menuRow:after {
    content: "";
    display: table;
    clear: both;
}

@media screen and (max-width: 600px) {
    .menuColumn {
        width: 100%;
        height: auto;
    }
}

<div class="navBar">
        <div class="menuDropDown">
            <button id="menuButton" title="Site Navigation"><i class="fas fa-bars"></i> Menu</button>
            <div class="menuContent">
            <div class="menuRow">
                <div class="menuColumn">
                    <h5 id="menuColumnHeader" title="Home Workspace">Home Workspace</h5>
                    <a href="#" title="Welcome"><i class="fas fa-exclamation-circle"></i> Welcome</a>
                    <a href="#" title="Timetable"><i class="far fa-calendar-alt"></i> Timetable</a>
                    <a href="#" title="Help"><i class="fa fa-question-circle"></i> Help</a>
                    <a href="#" title="Dashboard"><i class="fas fa-chart-line"></i> Dashboard</a>
                </div>
                <div class="menuColumn">
                </div>
                <div class="menuColumn">
                </div>
                <div class="menuColumn">
                </div>
                </div>
            </div>
            </div>
        </div>