onkeyup Attribute

Where to use the onkeyup Attribute

Description

The onkeyup attribute is a common attribute which may be used on most elements to specify script to be executed when the element has focus and a currently pressed key is released. This means that it only useful on those elements which can receive focus (such as text input fields).

See also the onkeydown and onkeypress attributes.

If you use this attribute (or any attributes of Type Script) the MIME type of the scripting language used should always be provided in a Content-Script-Type HTTP header.

It is good practice not to use these attributes, however, and instead to include external scripts (via script elements) which add any handlers unobtrusively. This makes code more self-contained and also the XHTML is easier to maintain if it doesn't contain any events attributes.