如何防止滚动被可滚动的子div阻止

Question

可能是一个基本问题，但我有一个可以滚动的大主体，并且在该主体内部我有几个可以滚动的子 div。

当我在 body 上滚动并且光标碰到其中一个子 div 时，它会卡住并开始滚动子 div。然后，当我到达子 div 中可滚动的末尾时，我将只能继续滚动 body/parent。

如果我正在滚动正文，我希望忽略子 div 中的滚动。如果这是不可能的，那么如果我在子 div 内按下鼠标按钮，我希望至少能够滚动子 div，否则滚动正文。

以下是行为示例：JSFiddle

位置用position: absolute固定

.area{
    overflow:auto;
    max-height:250px;
    width:300px;
    background:#000;
    color:#FFF;
    position: absolute;
    bottom:0px;
}

Answer 1

试试这样的。如果用户没有点击进入div，那么它不会滚动到div而是滚动到document。

var scrollArea = false;
$( '.area' ).on( 'mousewheel DOMMouseScroll', function ( e ) {
    var event = e.originalEvent;
    var d = -event.wheelDelta || event.detail;
    if(scrollArea)
    {
       this.scrollTop += d;
    }
    else
    {
    	 $(document).scrollTop($(document).scrollTop()+d);
    }
    e.preventDefault();
});

$( '.area' ).on( 'click', function ( e ) {
	  scrollArea = !scrollArea;
});

.area{
    overflow:auto;
    max-height:250px;
    width:300px;
    background:#000;
    color:#FFF;
    position: absolute;
    bottom:0px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="area">you thoroughly searched for an answer before asking your question? Sharing your research helps everyone. Tell us what you found (on this site or elsewhere) and why it didn’t meet your needs. This demonstrates that you’ve taken the time to try to help yourself, it saves us from reiterating obvious answers, and above all, it helps you get a more specific and relevant answer!Have you thoroughly searched for an answer before asking your question? Sharing your research helps everyone. Tell us what you found (on this site or elsewhere) and why it didn’t meet your needs. This demonstrates that you’ve taken the time to try to help yourself, it saves us from reiterating obvious answers, and above all, it helps you get a more specific and relevant answer!Have you thoroughly searched for an answer before asking your question? Sharing your research helps everyone. Tell us what you found (on this site or elsewhere) and why it didn’t meet your needs. This demonstrates that you’ve taken the time to try to help yourself, it saves us from reiterating obvious answers, and above all, it helps you get a more specific and relevant answer!
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</div>


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