CSS变换元素是否具有默认z-index? [英] Do CSS transformed elements have default z-index?
问题描述
我有一个很基本的例子,我有一个固定的标题与其他元素,一个接一个堆叠,单个元素转换使用 transform:rotate(360deg)
。
I've a pretty basic example here, am having a fixed header with other elements which are stacked one after another, single element is transformed using transform: rotate(360deg)
.
因此,只有当页面滚动时,转换元素覆盖固定栏,其他元素不滚动。所以问题是转换元素是否默认 z-index
?
So only the transformed element is getting over the fixed bar when the page is scrolled, where other elements doesn't. So the question is do transformed elements have default z-index
?
对于
.transform_me
使用z-index:-1;
它表现正常
CSS
.fixed {
height: 30px;
background: #f00;
position: fixed;
width: 100%;
top: 0;
}
.transform_me {
transform: rotate(360deg);
-webkit-transform: rotate(360deg);
}
span {
display: block;
height: 100px;
}
注意:对于固定的
div,说z-index:999;
,但这不是正在寻找。
Note: It will be solved if we use say
z-index: 999;
for the fixed div, but that's not what am looking for.
推荐答案
对于布局受CSS框模型控制的元素,除
none c c 会导致创建堆叠上下文和包含块。对象充当固定定位后代的包含块。
For elements whose layout is governed by the CSS box model, any value other than
none
for thetransform
results in the creation of both a stacking context and a containing block. The object acts as a containing block for fixed positioned descendants.
从规范。
堆叠上下文 。
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