website/static/playground.js/loadState
  var state = (function loadState(hash) {
    var parsed;
    try {
      // providing backwards support for old json encoded URIComponent
      if (hash.indexOf("%7B%22") !== -1) {
        parsed = JSON.parse(decodeURIComponent(hash));
      } else {
        parsed = JSON.parse(LZString.decompressFromEncodedURIComponent(hash));
      }
    } catch (error) {
      return DEFAULT_OPTIONS;
    }
    // Support old links with the deprecated "postcss" value for the parser option.
    if (parsed && parsed.options && parsed.options.parser === "postcss") {
      parsed.options.parser = "css";
    }

    return parsed || DEFAULT_OPTIONS;
  })(location.hash.slice(1));