h1是否需要成为标头标记中的第一个语义元素? [英] Does the h1 need to be the first semantic element in a header tag?
问题描述
我正在使用 Chrome大纲扩展程序检查我页面的语义.在文档主标题标签中的h1之前具有任何结构元素似乎是一个问题.我当时以为顺序无关紧要，但显然确实如此:
I am using a Chrome outliner extension to check the semantics of my page. It seems to be a problem to have any structural element before the h1 in the document main header tag. I was thinking the order does not matter, but apparently it does:
+Document Body
+Header
+nav
+h1 Main Navigation
+h1 MyPage
-Section
-Footer
像这样概述:
Untitled Body
Main Navigation
MyPage
etc...
但是当h1是标题中的第一个元素时:
But when the h1 is the first element in my header:
+Document Body
+Header
+h1 MyPage
+nav
+h1 Main Navigation
-Section
-Footer
它确实像这样概述:
MyPage
Main Navigation
etc...
那是为什么?大纲工具是否有问题，或者我是否理解HTML5语义中的某些错误? W3C规范似乎没有提及它: http://dev .w3.org/html5/spec/Overview.html#the-header-element
Why is that? Is the outliner buggy, or did I understand something wrong in HTML5 semantics? The W3C Specification does not seem to mention it: http://dev.w3.org/html5/spec/Overview.html#the-header-element
推荐答案
在重新查看规格后，我同意h1不必是第一个元素.我怀疑问题与您使用的chrome扩展有关.
After revisiting the specs, I agree that the h1 does not have to be the first element. I suspect the issue is with the chrome extension you are using.
我通过此HTML概述工具运行了以下两种情况，并收到了相同的结果(我的导航"出现在我的标题"下):
I ran the following two scenarios through this HTML outlining tool and received the same results (My Navigation appears under My Header):
标题下有h1第二个元素:
With h1 second element under header:
<body>
<header>
<h1>My Header</h1>
<nav><h1>My Navigation</h1></nav>
</header>
<section><h1>My Section</h1></section>
<footer></footer>
</body>
在标题下有H1第一个元素:
With H1 first element under header:
<body>
<header>
<nav><h1>My Navigation</h1></nav>
<h1>My Header</h1>
</header>
<section><h1>My Section</h1></section>
<footer></footer>
</body>
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