：第一个孩子没有按预期工作 [英] :first-child not working as expected
问题描述
我想用 h1 > detail_container 。如果 h1 是 div 中的第一个元素，但如果它在 ul 它不会工作。
I'm trying to select the first h1 inside a div with a class called detail_container. It works if h1 is the first element within this div, but if it comes after this ul it won't work.
<style type="text/css">
.detail_container h1:first-child
{
color:blue;
}
</style>
</head>
<body>
<div class="detail_container">
<ul>
<li></li>
<li></li>
</ul>
<h1>First H1</h1>
<h1>Second H1</h1>
</div>
</body>
</html>
我的印象是CSS我已经选择了第一个 h1 无论它在 div 中的何处。
I was under the impression that the CSS I have will select the first h1 no matter where it is in this div. How can I make it work?
推荐答案
h1：first-child 选择器方法
选择其父项的第一个子项
当且仅当它是h1元素。
：first-child 这里的容器是 ul ，因此不能满足 h1：first-child 。
The :first-child of the container here is the ul, and as such cannot satisfy h1:first-child.
对于您的情况，有CSS3的：first-of-type ：
There is CSS3's :first-of-type for your case:
.detail_container h1:first-of-type
{
color: blue;
}
但是对于浏览器兼容性的困扰和什么， h1 一个类，然后定位该类：
But with browser compatibility woes and whatnot, you're better off giving the first h1 a class, then targeting that class:
.detail_container h1.first
{
color: blue;
}
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