From 3e15b2ffe1353aa1a5da0e94acffa77186fc24a5 Mon Sep 17 00:00:00 2001
From: Reilly Grant <reillyeon@users.noreply.github.com>
Date: Mon, 2 Feb 2026 10:28:34 -0800
Subject: [PATCH] Make readable and writable attributes nullable

The stream attributes are nullable as they are initially null before the port is opened and become null after it is closed or a fatal error occurs.

Fixed #219.
---
 index.html | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/index.html b/index.html
index 2fab555..4a537bc 100644
--- a/index.html
+++ b/index.html
@@ -436,8 +436,8 @@ <h2>
       attribute EventHandler onconnect;
       attribute EventHandler ondisconnect;
       readonly attribute boolean connected;
-      readonly attribute ReadableStream readable;
-      readonly attribute WritableStream writable;
+      readonly attribute ReadableStream? readable;
+      readonly attribute WritableStream? writable;
 
       SerialPortInfo getInfo();