From d1823abd2b4b6e7218eb274ccccae8aeed1bfd4e Mon Sep 17 00:00:00 2001
From: Josh Story <story@hey.com>
Date: Thu, 25 Apr 2024 09:56:54 -0700
Subject: [PATCH] update UMD section

---
 .../blog/2024/04/01/react-19-upgrade-guide.md        | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/content/blog/2024/04/01/react-19-upgrade-guide.md b/src/content/blog/2024/04/01/react-19-upgrade-guide.md
index bec8efd1a..09bd20203 100644
--- a/src/content/blog/2024/04/01/react-19-upgrade-guide.md
+++ b/src/content/blog/2024/04/01/react-19-upgrade-guide.md
@@ -449,7 +449,17 @@ TODO
 
 ### UMD builds removed {/*umd-builds-removed*/}
 
-TODO
+UMD builds are not well tested by React's own tooling and add project complexity and release overhead. While UMD was widely used in the past and a convenient way to load React without a build step it is no longer widely used and there are modern alternatives to loading modules as scripts in HTML Documents.
+
+In React 19 there are no more UMD builds. If you want to load React 19 using a script tag try using ESM based CDN such as [esm.sh](https://esm.sh/)
+
+```html
+<script type="module">
+  import React from "https://esm.sh/react@19/?dev"
+  import ReactDOMClient from "https://esm.sh/react-dom@19/client?dev"
+  ...
+</script>
+```
 
 ### Libraries depending on React internals may block upgrades {/*libraries-depending-on-react-internals-may-block-upgrades*/}