Is it valid to nest inside ?

Question

Is this valid HTML?

<!DOCTYPE html>
<html>
    <head/>
    <body>
        <p>Hello, World</p>
        <html>
            <head/>
            <body>
                <p>Hello, World 2: Revenge of the Pointer</p>
            </body>
        </html>
        <html>
            <head/>
            <body>
                <p>Hello, World 3: GOTO null</p>
            </body>
        </html>
    </body>
</html>

According to the HTML5 specs, the <html> element can be used:

As the root element of a document.

Wherever a subdocument fragment is allowed in a compound document.

It's the second part that I'm confused about. Does this mean that <html> is a "document" and any nested <html> is a "subdocument fragment"? How can I tell if this is "allowed"?

Golden_flash · Accepted Answer

As said by Guffa

A compound document is a document in itself and you can't use html to make a sub-document.

But a html may contain a iframe which is a sub-document and has html tag. enter image description here

Guffa · Answer

No, that is not valid.

A compound document has a subdocument fragment declared inside it, which is a complete document in itself. You can't just use another html tag to make a compound document.

Is it valid to nest <html> inside <html>?

Tags:

html

specifications

Scribblemacher

2 Answers

Golden_flash

Guffa

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