![]() ![]() This is usually the decimal ASCII ( RFC 20) or Windows 1252 code corresponding to the key. If the key can't be identified, this value is 0. You should avoid using this if possible it's been deprecated for some time. Instead, you should use de, if it's implemented. Unfortunately, some browsers still don't have it, so you'll have to be careful to make sure you use one which is supported on all target browsers. The value of key events which are caused by pressing or releasing printable keys in standard position is not compatible between browsers. IE just exposes the native virtual keycode value as KeyboardEvent.ke圜ode. Google Chrome, Chromium and Safari must decide the value from the input character. If the inputting character can be inputted with the US keyboard layout, they use the ke圜ode value on the US keyboard layout. ![]() Starting in Firefox 15 (Firefox 15.0 / Thunderbird 15.0 / SeaMonkey 2.12), Gecko gets ke圜ode values from ASCII characters inputtable by the key - even with shift modifiers or an ASCII capable keyboard layout. If the system is Windows and the native keycode of the pressed key indicates that the key is a-z or 0-9, use a keycode for it.If the system is Mac and the native keycode of the pressed key indicates that the key is 0-9, use a keycode for it.If the pressed key inputs an ASCII alphabetic or numeric character with no modifier key, use a keycode for it.If the pressed key inputs an ASCII alphabetic or numeric character with a Shift key modifier, use a keycode for it.If the pressed key inputs a different ASCII character with no modifier key, use a keycode for it.If the pressed key inputs a different ASCII character with a Shift key modifier, use a keycode for it.Otherwise, i.e., pressed key inputs a unicode character.If the keyboard layout is ASCII-capable (i.e., can input ASCII alphabets), use 0 or compute with the following additional rules.Otherwise, i.e., the keyboard layout isn't ASCII capable, use the ASCII capable keyboard layout installed on the environment with the highest priority.If the pressed key on the alternative keyboard layout inputs an ASCII alphabetic or numeric character, use a keycode for it.Otherwise, use 0 or compute with the following additional rules. ![]() Starting in Firefox 60 (Firefox 60.0 / Thunderbird 60.0 / SeaMonkey 2.57), Gecko sets ke圜ode values of punctuation keys as far as possible (when points 7.1 or 7.2 in the above list are reached) with the following rules: Warning: The purpose of these new additional rules is for making users whose keyboard layouts map unicode characters to punctuation keys in a US keyboard layout can use web applications which support Firefox only with ASCII-capable keyboard layouts or just with a US keyboard layout. Otherwise, the newly mapped ke圜ode values may be conflict with other keys. For example, if the active keyboard layout is Russian, the ke圜ode value of both the "Period" key and "Slash" key are 190 ( KeyEvent.DOM_VK_PERIOD). If you need to distinguish those keys but you don't want to support all keyboard layouts in the world by yourself, you should probably use de. If the active keyboard layout is not ASCII-capable and an alternative ASCII-capable keyboard layout is available.If the alternative ASCII-capable keyboard layout produces an ASCII character via just the unmodified key, use a ke圜ode for the character.If the alternative ASCII-capable keyboard layout produces an ASCII character with a Shift key modifier, use a ke圜ode for the shifted character.Otherwise, use a ke圜ode for an ASCII character produced by the key when the US keyboard layout is active. ![]()
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