Is it Possible to Close HTML Spans Using ``?-CSS Tutorial-php.cn

Is it Possible to Close HTML Spans Using ``?

Barbara Streisand

Release： 2024-10-29 09:13:02

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Is it Possible to Close HTML Spans Using ``?

Can HTML Spans Be Closed Using ?

Introduction:

HTML spans are used to group elements within a document. Traditionally, they are opened using the tag and closed using . However, a question arises: can spans be closed using instead? The answer lies in understanding the role of document types.

Self-Closing Tags in XHTML:

When using XHTML (Extensible HyperText Markup Language), a strict version of HTML that conforms to XML rules, self-closing tags are widely supported by major browsers. This means that is a valid way to close a span element in XHTML.

To illustrate, consider the following valid XHTML example:

<code class="html"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head>
<body>
    <h2>Will test page</h2>
    <p>some stuff <span class="drop" /></p>
</body>
</html></code>

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Invalidity in HTML:

In contrast, when using HTML (HyperText Markup Language), which is more lenient than XHTML, self-closing tags are not universally valid. While browsers may interpret some self-closing tags correctly, such as
and

, others, including , are not supported.

Consider the following invalid HTML example:

<code class="html"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head>
<body>
    <h2>Will test page</h2>
    <p>some stuff <span class="drop" /></p>
</body>
</html></code>

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Additional Considerations:

It's important to note that browsers will interpret all self-closing tags correctly only if the MIME type of the document is text/xml or application/xhtml xml. For pages served as text/html, which is the vast majority, only certain tags can be self-closed.

Helpful References:

[W3C Validator](https://validator.w3.org/)
[XHTML vs HTML](https://www.w3.org/TR/2002/REC-xhtml1-20020801/xhtml.html#xhtml-vs-html)

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