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key filters #556

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@matchdav

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@matchdav

So I really like Mousetrap. But it only captures window keypress events.

I'd like to add most of its aliases to the key filter, but I can't see a tidy way to do it.

You've got this private dictionary in here:

/**
 * A special filter that takes a handler function,
 * wraps it so it only gets triggered on specific
 * keypresses. v-on only.
 *
 * @param {String} key
 */

var keyCodes = {
  enter    : 13,
  tab      : 9,
  'delete' : 46,
  up       : 38,
  left     : 37,
  right    : 39,
  down     : 40,
  esc      : 27
}

exports.key = function (handler, key) {
  if (!handler) return
  var code = keyCodes[key]
  if (!code) {
    code = parseInt(key, 10)
  }
  return function (e) {
    if (e.keyCode === code) {
      return handler.call(this, e)
    }
  }
}

I wonder if it would be reasonable to have a registerKeyCode({alias1:code1,alias2,code2,etc}) method since it seems like something people might want to extend often.

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