From afdea8dc58219ccb2d7172d607cf95459de8c8e0 Mon Sep 17 00:00:00 2001
From: "Michael[tm] Smith" <mike@w3.org>
Date: Tue, 16 Mar 2021 14:01:33 +0900
Subject: [PATCH] CORS: Clarify what XHR upload event-listening triggers
 preflight (#3138)

---
 files/en-us/web/http/cors/index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/files/en-us/web/http/cors/index.html b/files/en-us/web/http/cors/index.html
index 142e06a8f45a463..4dfe159c13ad160 100644
--- a/files/en-us/web/http/cors/index.html
+++ b/files/en-us/web/http/cors/index.html
@@ -85,7 +85,7 @@ <h3 id="Simple_requests">Simple requests</h3>
    <li><code>text/plain</code></li>
   </ul>
  </li>
- <li>No event listeners are registered on any {{domxref("XMLHttpRequest.upload")}} object used in the request; these are accessed using the {{domxref("XMLHttpRequest.upload")}} property.</li>
+ <li>If the request is made using an {{domxref("XMLHttpRequest")}} object, no event listeners are registered on the object returned by the {{domxref("XMLHttpRequest.upload")}} property used in the request; that is, given an {{domxref("XMLHttpRequest")}} instance <code>xhr</code>, no code has called <code>xhr.upload.addEventListener()</code> to add an event listener to monitor the upload.</li>
  <li>No {{domxref("ReadableStream")}} object is used in the request.</li>
 </ul>