1 files changed, 17 insertions, 0 deletions
diff --git a/src/pages/CallbackPage.tsx b/src/pages/CallbackPage.tsx
new file mode 100644
index 0000000..caa384f
--- /dev/null
+++ b/src/pages/CallbackPage.tsx
@@ -0,0 +1,17 @@
+/** @jsx jsx */
+import { jsx } from "@emotion/core";
+import { useState } from "react";
+
+export default function CallbackPage() {
+    const [hasSent, setHasSent] = useState(false);
+    const params = new URLSearchParams(document.location.search);
+
+    const code = params.get("code");
+
+    if (!hasSent) {
+        setHasSent(true);
+        window.opener.postMessage(code);
+    }
+
+    return <p>Code is {code}</p>;
+}