fix empty hash

website/playground/urlHash.js

@@ -2,6 +2,8 @@ import LZString from "lz-string";
 
 export function read() {
   const hash = document.location.hash.slice(1);
+  if (!hash) return {};
+
   // backwards support for old json encoded URIComponent
   const decode =
     hash.indexOf("%7B%22") !== -1