W3C has tended towards lowercase for attribute names and values for a while. For example section 4.11 of the xhtml 1.0 standard in 2002: 4.11. Attributes with pre-defined value sets HTML 4 and XHTML both have some attributes that have pre-defined and limited sets of values (e.g. the type attribute of the input element). In … Read more
Import the WinAPI function GetKeyState: [DllImport(“user32.dll”, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)] public static extern short GetKeyState(int keyCode); And then you can use it like this: bool CapsLock = (((ushort)GetKeyState(0x14)) & 0xffff) != 0; bool NumLock = (((ushort)GetKeyState(0x90)) & 0xffff) != 0; bool ScrollLock = (((ushort)GetKeyState(0x91)) & 0xffff) != 0; It is … Read more
Linux? With X, use xmodmap to alter the key mapping, e.g. xmodmap -e ‘clear Lock’ -e ‘keycode 0x42 = Escape’ Will map Esc to the CapsLock key. Google for more examples.
In jQuery, $(‘#example’).keypress(function(e) { var s = String.fromCharCode( e.which ); if ( s.toUpperCase() === s && s.toLowerCase() !== s && !e.shiftKey ) { alert(‘caps is on’); } }); Avoid the mistake, like the backspace key, s.toLowerCase() !== s is needed.
Edit: As described in this answer, newer versions of MacOS now have native support for rebinding Caps Lock to Escape. Thus it is no longer necessary to install third-party software to achieve this. Here’s my attempt at a comprehensive, visual walk-through answer (with links) of how to achieve this using Seil (formerly known as PCKeyboardHack). … Read more