Note that this event attribute cannot be applied to the following elements:
ExampleThis attribute may be used when a key that’s being held down continuously has some kind of timer effect—for example, the user presses the space key until an activity on screen is completed (releasing the key may cause the action to pause)—like so:
This attribute has no fixed value.
It’s up to the author to decide on the scripting that’s included here, be
that a call to one or more defined functions, or a simple
Every browser listed supports this attribute. However, inline event handlers such as this should be avoided. In the same way that inline CSS styles are frowned upon but externally defined CSS styles are considered good practice, inline event handlers should be stripped out and replaced with events attached unobtrusively through the DOM.
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