Auth0 SDK redirect handler fix (#177)

* Callback handler checks for state in url as well as code

* Updated dependencies

Author: Steve Hobbs

01-Login/src/react-auth0-spa.js

@@ -1,7 +1,6 @@
 import React, { useState, useEffect, useContext } from "react";
 import createAuth0Client from "@auth0/auth0-spa-js";
 
-
 const DEFAULT_REDIRECT_CALLBACK = () =>
   window.history.replaceState({}, document.title, window.location.pathname);
 
@@ -23,7 +22,10 @@ export const Auth0Provider = ({
       const auth0FromHook = await createAuth0Client(initOptions);
       setAuth0(auth0FromHook);
 
-      if (window.location.search.includes("code=")) {
+      if (
+        window.location.search.includes("code=") &&
+        window.location.search.includes("state=")
+      ) {
         const { appState } = await auth0FromHook.handleRedirectCallback();
         onRedirectCallback(appState);
       }