At first glance, it seems like this event is fired when you press down on any key. Both of these events work on any key that you The keyup event is fired when you release a The keydown event is fired when you press down on a key on your keyboard. Given what these events are called, you probably already have a vague You will need to familiarize yourself with. To work with keyboards in a HTML document, there are three events that Thanks to Anne van Kesteren, Alexey Proskuryakov, Olli Pettay, Bjoern Hoehrmann and Oliver Hunt for comments on earlier (and more complicated) versions of this draft.To kick your JavaScript skills into outer space, everything you need to become a JS expert is available in both paperback and digital editions. The following punctuation characters may change virtual codes between keyboard layouts, but reporting these values will likely be more compatible with legacy content expecting US-English keyboard layout: The key The virtual key codes for the following keys do not usually change with keyboard layouts on desktop systems: The key
If the implementation supports a 'split model', set ke圜ode to 0. If the implementation supports a 'conflated model', set ke圜ode to the Unicode code point of the character being entered. The ke圜ode for keypress events is calculated as follows: How to calculate ke圜ode for keypress events 
Return the virtual key code from the operating system. If the key's function, as determined in an implementation-specific way, corresponds to one of the keys in the table of fixed virtual key codes, return the corresponding key code. If the conversion table specifies an alternate virtual key value for the given input, return the specified value. If the implementation supports a key code conversion table for the operating system and platform, look up the value. If input key when pressed without modifiers would insert a a lower case character in the a-z alphabetical range, return the ASCII code of the upper case equivalent. If input key when pressed without modifiers would insert a numerical character (0-9), return the ASCII code of that numerical character. If an Input Method Editor is processing key input and the event is keydown, return 229. Read the virtual key code from the operating system's event information, if such information is available. The ke圜ode for keydown / keyup events is calculated as follows: How to calculate ke圜ode for keydown and keyup events Ke圜ode in key events ke圜ode property of key events Event modelsĪn implementation may choose to expose both virtual key codes and character codes in the ke圜ode property ('conflated model'), or report separate ke圜ode and charCode properties ('split model').
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