Fix base_url being undefined on unsuccessful login (#18)

* Fix base_url being undefined on unsuccessful login

* update readme

src/pages/LoginPage.tsx

@@ -168,7 +168,9 @@ const LoginPage = () => {
     const [matrixVersions, setMatrixVersions] = useState("");
 
     const handleUsernameChange = () => {
-      if (formData.base_url || allowSingleBaseUrl) return;
+      if (formData.base_url || allowSingleBaseUrl) {
+        return;
+      }
       // check if username is a full qualified userId then set base_url accordingly
       const domain = splitMxid(formData.username)?.domain;
       if (domain) {
@@ -180,6 +182,9 @@ const LoginPage = () => {
     };
 
     useEffect(() => {
+      if (!formData.base_url) {
+        form.setValue("base_url", "");
+      }
       if (formData.base_url === "" && allowMultipleBaseUrls) {
         form.setValue("base_url", restrictBaseUrl[0]);
       }

src/synapse/authProvider.ts

@@ -48,7 +48,7 @@ const authProvider: AuthProvider = {
     if (!base_url) {
       // there is some kind of bug with base_url being present in the form, but not submitted
       // ref: https://github.com/etkecc/synapse-admin/issues/14
-      localStorage.removeItem("base_url")
+      storage.removeItem("base_url")
       throw new Error("Homeserver URL is required.");
     }
     base_url = base_url.replace(/\/+$/g, "");