如何使用CSS隐藏滚动条并且兼容大部分浏览器

隐藏滚动条，已经自己实测在浏览器Chrome, IE (6+), Firefox, Opera, Safari。

如下demo:

Content 1

<html>
<head>
    <style>
        .element,
        .outer-container {
            width: 200px;
            height: 200px;
        }

        .outer-container {
            /* border: 5px solid purple; */
            position: relative;
            overflow: hidden;
        }

        .inner-container {
            position: absolute;
            left: 0;
            overflow-x: hidden;
            overflow-y: scroll;
        }

        .inner-container::-webkit-scrollbar {
             display: none; 
        }
    </style>
</head>
<body>
    <div class="outer-container">
        <div class="inner-container">
            <div class="element">
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
                <div>Content 1</div>
            </div>
        </div>
    </div>
</body>
</html>

参见：https://blogs.msdn.microsoft.com/kurlak/2013/11/03/hiding-vertical-scrollbars-with-pure-css-in-chrome-ie-6-firefox-opera-and-safari/