上下回弹效果实现，父元素有且只能一个子元素，三辈不管。

section{

flex: 1;

overflow: hidden;

}

li{

height: 80px;

border-bottom: 1px solid red;

}

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<section>

<ul>

<li>aaaa</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>1111</li>

<li>bbbb</li>

</ul>

</section>

---------------------------------------------------------------------

<script>window.PointerEvent = void 0</script>

<script src="iscroll.js" type="text/javascript" charset="utf-8"></script>

var myScroll=new IScroll('section',{

click:true//实例化区间允许使用click事件

})