Archive for January 12th, 2015

Download the code.

See the demo.

See the hotkeys demo.

Dealing with keydown events is a pain, since the event object has always encoded the key as an arbitrary numeric code, so any program that deals with key-related events has something like:

var charcodes = {
	 32	: ' ',
	  8	: 'Backspace',
	 20	: 'CapsLock',
	 46	: 'Delete',
	 13	: 'Enter',
	 27	: 'Escape',
	 45	: 'Insert',
	144	: 'NumLock',
	  9	: 'Tab'

And so on. There is a proposal to add a key field that uses standardized names for the keys, but only Firefox and IE implement that right now. The time is ripe for a polyfill to bring Chrome and Safari into the twenty-first century, and I'd already worked on something similar with my $.keymap plugin.

So I updated that plugin to simply implement the key field in keydown and keyup events. Now just include the plugin and you can do things like:

  if (event.key == 'Escape') { do something useful }

Continue reading ‘Rethinking $.keymap’ »