HTML <keygen> autofocusAttribute

HTML keygen 标签参考手册HTML <keygen> Tag

Example

Make the "Encryption" field automatically get focus when the page loads:

<form action="demo_keygen.html" method="get"> Username: <input type="text" name="usr_name"> Encryption: <keygen name="security" autofocus> <input type="submit"> </form>

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Browser Support

Internet ExplorerFirefoxOperaGoogle ChromeSafari

Opera, Chrome, and Safari 6 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 get focus when the page loads.

Differences between HTML 4.01 and HTML5

The <keygen> tag is new in HTML5.

Differences between HTML and XHTML

In XHTML, attribute minimization is forbidden, and the autofocus attribute must be defined as <keygen autofocus="autofocus" />.

Syntax

<keygen autofocus>

HTML keygen 标签参考手册HTML <keygen> Tag Other Extensions