In HTML, dfn is a phrase tag, used to define a definition item. It can mark those definitions of special terms or phrases. The syntax "Definition item"; browse The browser usually displays the text in "" in italics.
The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.
In HTML, dfn is a phrase tag used to define a definition item.
Tags mark definitions of special terms or phrases.
Popular browsers usually display text in in italics. In the future, may also be useful in creating an index or glossary of documents.
Like many other content-based styling and physical style tags, the tag is best used sparingly. As a general style, especially in technical documentation, when new terms are introduced for the first time, they should be separated from the normal text so that the reader can better understand the current topic of the article and not be confused about it from then on. The term carries no markings.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<em>强调文本</em><br>
<strong>加粗文本</strong><br>
<dfn>定义项目</dfn><br>
<code>一段电脑代码 print("Hello World")</code><br>
<samp>计算机样本</samp><br>
<kbd>键盘输入</kbd><br>
<var>变量</var>
</body>
</html>
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