docs: 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();
        })
      ];
    }
  }