如何在CSS中使用自定义样式的滚动条模拟OS X滚动条行为

Question

我想用CSS设置滚动条的样式，但我也想让它的行为像OS的本机滚动条一样(即只在滚动时显示，在空闲时淡出)。

有没有办法用纯CSS做到这一点？

Answer 1

我认为浏览器不会让你对原生UI有那么多的控制，只有CSS。

您需要使用JavaScript来操作滚动事件。幸运的是，您不必重新发明轮子，请考虑以下插件：http://enscrollplugin.com/

• 使用jQuery
• 控件滚动条外观和淡入淡出

​

$('#scrollbox3').enscroll({
    showOnHover: true,
    verticalTrackClass: 'track3',
    verticalHandleClass: 'handle3'
});

#scrollbox3 {
    overflow: auto;
    width: 400px;
    height: 360px;
    padding: 0 5px;
    border: 1px solid #b7b7b7;
}

.track3 {
    width: 10px;
    background: rgba(0, 0, 0, 0);
    margin-right: 2px;
    border-radius: 10px;
    -webkit-transition: background 250ms linear;
    transition: background 250ms linear;
}

.track3:hover,
.track3.dragging {
    background: #d9d9d9; /* Browsers without rgba support */
    background: rgba(0, 0, 0, 0.15);
}

.handle3 {
    width: 7px;
    right: 0;
    background: #999;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 7px;
    -webkit-transition: width 250ms;
    transition: width 250ms;
}

.track3:hover .handle3,
.track3.dragging .handle3 {
    width: 10px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://enscrollplugin.com/releases/enscroll-0.6.1.min.js"></script>

<div id="scrollbox3">
    <h1>New Scrolling Window</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam a justo erat, volutpat hendrerit dolor. Sed urna nibh, dapibus at egestas non, vulputate ut quam. Morbi a erat tristique tellus varius venenatis. Aenean lacinia sem eget turpis fringilla commodo. Sed lorem nisi, viverra a interdum nec, varius eu enim. Donec ornare, nunc quis eleifend iaculis, nulla eros mollis tellus, quis faucibus risus odio non lectus. Maecenas ac velit non metus rhoncus commodo. Nunc ligula est, ultricies sed mattis sed, dapibus at arcu. Maecenas lacinia nisl ut sem bibendum ac condimentum purus facilisis. Curabitur ut nibh lobortis libero interdum vehicula vel quis nulla.</p>
    
    <p>Suspendisse et massa urna. Donec eu lorem nec felis dapibus aliquam viverra in quam. Suspendisse ultrices, nisi ac venenatis porttitor, erat turpis dapibus augue, sed rutrum nunc ante sed enim. Aliquam et tempus mi. Nullam malesuada, nunc a eleifend pretium, justo lorem tempus justo, id adipiscing dolor ipsum sed velit. Maecenas odio massa, feugiat vel sodales ut, placerat at quam. Cras viverra diam vitae diam elementum vitae aliquet erat tincidunt. Quisque fringilla neque in lacus tempor cursus. Curabitur eget nulla et nisi dignissim tempor vel non risus. Mauris ac ipsum metus, a auctor massa. Nunc eros ante, ullamcorper a mollis nec, aliquam sed est. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
</div>

​

来源：http://jsfiddle.net/jstoudt/f2Y5S/