xml-lite/dist/lib/codemirror-5.18.2/addon/display/fullscreen.css

maintaining xml in pure javascript (IN BOTH NODE.JS & BROWSERS)

.CodeMirror-fullscreen {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  height: auto;
  z-index: 9;
}