HTML Reference Manual

HTML Tag Catalog

HTML keygen autofocus attribute

The keygen autofocus attribute is a boolean attribute; the autofocus attribute specifies that the <keygen> element will automatically gain focus when the page is loaded.

　HTML <keygen> tag

Online Example

Let the "Encryption" field automatically gain focus when the page is loaded:

Example

<!DOCTYPE html>
<html>
<head>　
<meta charset="utf-8">　
<title>基础教程网(oldtoolbag.com)</title>　
</head>
<body>
<form action="demo-frame.php" method="get">
　　Username:　<input type="text" name="usr_name">
　　Encryption:　<keygen name="security" autofocus>
　　<input type="submit">
</form>
</body>
</html>

Test and see ‹/›

Browser Compatibility

IEFirefoxOperaChromeSafari

Opera, Chrome, and Safari 6 Browsers that support the autofocus attribute of the <keygen> tag

Definition and Usage

The autofocus attribute is a boolean attribute.

The autofocus attribute specifies that the <keygen> element will automatically receive focus when the page is loaded.

HTML 4.01 differences with HTML5differences

<keygen> tag is HTML5 new tags.

Differences between HTML and XHTML

In XHTML, attribute shorthand is prohibited, the autofocus attribute must be defined as <keygen autofocus="autofocus" />。

Syntax

<keygen autofocus>

　HTML <keygen> tag

HTML: <template> tag