From edd92cea4fdb559f84eb07369f7798d072e46b93 Mon Sep 17 00:00:00 2001
From: Michael Wilson <mjwilson@chromium.org>
Date: Fri, 16 Oct 2026 02:21:51 -0700
Subject: [PATCH] Populate MIDIInputMap and MIDIOutputMap before resolving
 requestMIDIAccess()

---
 index.html | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/index.html b/index.html
index 80d236b..1f9b734 100644
--- a/index.html
+++ b/index.html
@@ -362,6 +362,16 @@ <h2>
                   instance of MIDIAccess will not be returned each time).
                 </p>
               </li>
+              <li>
+                <p>
+                  Initialize the underlying MIDI system and populate
+                  <var>access</var>'s {{MIDIAccess/inputs}} and
+                  {{MIDIAccess/outputs}} with the currently available [=MIDI
+                  input ports=] and [=MIDI output ports=]. If the underlying
+                  systems raise any errors, jump to the step labeled
+                  <em>failure</em> below.
+                </p>
+              </li>
               <li>
                 <p>
                   Call <var>resolver</var>'s <code>accept(value)</code> method