extend .key() method can delegate binding if using jQuery or Zepto

[dishuostec]

This feature need jQuery or Zepto. usage: jwerty.key('ctrl+enter', function(){...}, '.element_currentlynot exist'); jwerty.key('ctrl+enter', function(){...}, '.element_currentlynot exist_too', '.wrap_element');

and we can use like this: $('.wrap_element').jwerty('ctrl+enter', function(){}); $('.wrap_element').jwerty('ctrl+enter', '.element_currently_not_exist', function(){});

[keithamus]

I think this can be done a bit more cleanly. So while I like the idea of event delegation, I'm not going to accept this particular implementation.