Chrome和Firefox之间的Flexbox /位置滚动差异

Question

我有一个position:fixed叠加层，我正在填充导航和内容，如此小提琴所示：https://jsfiddle.net/9871Lz1u/1/

我在固定位置div中使用flexbox来控制导航按钮的位置，并使用相对定位的div来容纳内容。使用Chrome，这完全符合预期。然而，使用Firefox / Safari（最新版本），我发现当将光标悬停在flexbox（红色和蓝色）区域上时，滚动被锁定。我必须将光标悬停在白色内容框上以“启用”滚动。

我想要Chrome的行为，无论光标在哪里都允许滚动，这是最终的一致行为。此外，如果可能的话，我希望解决方案是纯HTML / CSS。

我的系统：macOS版本10.13.2，Chrome版本63.0.3239.132，Firefox版本58.0

.container {
  background: black;
  display: block;
  position: fixed;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  overflow: auto;
}

.content {
  background: white;
  margin: auto;
  max-width: 400px;
  padding: 15px;
  z-index: 2;
  position: relative;
	overflow: auto;
}

.nav-outer {
  position:fixed;
	top: 0px;
	bottom: 0px;
	left: 0px;
	right: 0px;
  z-index: 1;
}

.nav-inner {
  display: flex;
	width: 100%;
	height: 100%;
	flex-direction: row;
	flex-wrap: nowrap;
}

.nav-center {
  flex: 1 100%;
	order: 2;
	max-width: 400px;
}

.nav-container {
  flex: 1 auto;
	display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
	/* -ms-flex-align: center;
	-webkit-align-items: center;
	-webkit-box-align: center; */
	align-items: center;
	overflow: hidden;
}

.nav-left {
  order: 1;
  background: red;
}

.nav-right {
  order: 3;
  background: blue;
}

.nav-button {
  width: 70px;
	height: 70px;
	border-radius: 50%;
	background-color: black;
	display: block;
	z-index: 10;
	margin: auto;
	background-repeat: no-repeat;
	background-size: 40px 40px;
	border: 1px solid white;
}

<div class="container">
  <div class="content">
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
    Some overflowable content<br/>
  </div>
  <div class="nav-outer">
    <div class="nav-inner">
      <div class="nav-container nav-left">
        <div class="nav-button"></div>
      </div>
      <div class="nav-center"></div>
      <div class="nav-container nav-right">
        <div class="nav-button"></div>
      </div>
    </div>
  </div>
</div>

Answer 1

浏览器处理此问题的一般方法是，它们将滚动包含光标的元素。

即使是Chrome，您也可以在堆栈代码中看到（当不在＆＃34;扩展模式＆＃34;时），如果光标不是＆n，它将滚动整个stackoverflow页面如果你开始滚动红色或蓝色元素，那么＃t; t over可滚动文本和小提琴。

但是，如果您第一次滚动文本，Chrome会继续滚动它，即使将光标移动到红色或蓝色元素之后，我的猜测是它会记住最后一次滚动，保持它是 >滚动焦点，直到另一个元素获得焦点。

因此，使用现有的标记，您将需要一个脚本来完成它，这里有一个示例，使用jQuery：

• Scroll a div while using the scrollwheel over another div

通过更改标记，只需删除container即可完成脚本需求。

这对布局没有影响，因为body或多或少具有与固定container完全相同的行为，因此它将是body将滚动，这将跨浏览器工作。

Updated fiddle

Stack snippet

＆＃13;

＆＃13;

body {
  background: black;
  margin: 0;
}

.content {
  background: white;
  margin: auto;
  max-width: 400px;
  padding: 15px;
  z-index: 2;
  position: relative;
  overflow: auto;
}

.nav-outer {
  position: fixed;
  top: 0px;
  bottom: 0px;
  left: 0px;
  right: 0px;
  z-index: 1;
}

.nav-inner {
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: row;
  flex-wrap: nowrap;
}

.nav-center {
  flex: 1 100%;
  order: 2;
  max-width: 400px;
}

.nav-container {
  flex: 1 auto;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  /* -ms-flex-align: center;
	-webkit-align-items: center;
	-webkit-box-align: center; */
  align-items: center;
  overflow: hidden;
}

.nav-left {
  order: 1;
  background: red;
}

.nav-right {
  order: 3;
  background: blue;
}

.nav-button {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: black;
  display: block;
  z-index: 10;
  margin: auto;
  background-repeat: no-repeat;
  background-size: 40px 40px;
  border: 1px solid white;
}

＆＃13;

<div class="content">
  Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/> Some overflowable content
  <br/>
</div>
<div class="nav-outer">
  <div class="nav-inner">
    <div class="nav-container nav-left">
      <div class="nav-button"></div>
    </div>
    <div class="nav-center"></div>
    <div class="nav-container nav-right">
      <div class="nav-button"></div>
    </div>
  </div>
</div>

＆＃13;

＆＃13;

＆＃13;