滚动父div时滚动子div

Question

当用户在父div上滚动时，子应滚动至结束，然后应继续滚动页面。

我想这个反向逻辑 Scrolling in child div (fixed) should scroll parent div

但不起作用。请建议如何让这项工作。

.scrolling-child{ height: 50px; width:400px; border:1px solid green; overflow:scroll; } 
 
.parent { height: 5000px; width:100%; padding: 20px 0; border:1px solid red; overflow:scroll;}

<div class="parent"> 
 
<div class="scrolling-child"> 
 
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Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. 
 
</div> 
 
</div>

Answer 1

如果我理解正确只需添加位置：固定;到滚动的孩子div。见下文。

.scrolling-child{height: 50px; width:400px; border:1px solid green; overflow:scroll; position:fixed;} 
 

 
.parent {height: 5000px; width:100%; padding: 20px 0; border:1px solid red; }

<div class="parent"> 
 
<div class="scrolling-child"> 
 
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. 
 
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. 
 
</div> 
 
</div>