(function () {
  // DEV: We don't use var but favor parameters since these play nicer with minification
function computedStyle(el, prop, getComputedStyle, style) {
  getComputedStyle = window.getComputedStyle;
  style =
      // If we have getComputedStyle
      getComputedStyle ?
        // Query it
        // TODO: From CSS-Query notes, we might need (node, null) for FF
        getComputedStyle(el) :

      // Otherwise, we are in IE and use currentStyle
        el.currentStyle;
  if (style) {
    return style
    [
      // Switch to camelCase for CSSOM
      // DEV: Grabbed from jQuery
      // https://github.com/jquery/jquery/blob/1.9-stable/src/css.js#L191-L194
      // https://github.com/jquery/jquery/blob/1.9-stable/src/core.js#L593-L597
      prop.replace(/-(\w)/gi, function (word, letter) {
        return letter.toUpperCase();
      })
    ];
  }
}

  window.computedStyle = computedStyle;
}());