anchor.diff:      var csrfToken = "<%= csrf_token %>";
   
       var previousFrame = null;
  -    var previousFrameInfo = null;
       var allFrames = document.querySelectorAll("ul.frames li");
  -    var allFrameInfos = document.querySelectorAll(".frame_info");
  +    var frameInfos = document.querySelector(".frameInfos");
  +
  +    document.querySelector('body').classList.remove("better-errors-javascript-not-loaded");
  +    document.querySelector('body').classList.add("better-errors-javascript-loaded");
   
       function apiCall(method, opts, cb) {
           var req = new XMLHttpRequest();
  
positive.code:     .trace_info .title .name {
          float: right;
          font-weight: 200;
      }
  
      .code, .be-console, .unavailable {
  
negative.code:      * Navigation
       * --------------------------------------------------------------------- */
  
      .better-errors-javascript-not-loaded .backtrace .tabs {
          display: none;
      }
  
      nav.tabs {
          border-bottom: solid 1px #ddd;
  
  