diff --git a/aspnetcore/blazor/fundamentals/startup.md b/aspnetcore/blazor/fundamentals/startup.md
index dc028d4a5566..fac7e0859e7e 100644
--- a/aspnetcore/blazor/fundamentals/startup.md
+++ b/aspnetcore/blazor/fundamentals/startup.md
@@ -458,6 +458,29 @@ In `wwwroot/index.html`, remove the default SVG round indicator in `<div id="app
 
 :::moniker-end
 
+:::moniker range=">= aspnetcore-8.0"
+
+## Configure the .NET WebAssembly runtime
+
+To configure the .NET WebAssembly runtime, use the `configureRuntime` property with the `dotnet` runtime host builder.
+
+The following example sets an environment variable, `CONFIGURE_RUNTIME`, to `true`:
+
+```html
+<script src="{BLAZOR SCRIPT}" autostart="false"></script>
+<script>
+  Blazor.start({
+    configureRuntime: dotnet => {
+      dotnet.withEnvironmentVariable("CONFIGURE_RUNTIME", "true");
+    }
+  });
+</script>
+```
+
+In the preceding example, the `{BLAZOR SCRIPT}` placeholder is the Blazor script path and file name.
+
+:::moniker-end
+
 ## Additional resources
 
 * [Environments: Set the app's environment](xref:blazor/fundamentals/environments)
diff --git a/aspnetcore/release-notes/aspnetcore-8.0.md b/aspnetcore/release-notes/aspnetcore-8.0.md
index 00efd7031bb6..a92fa0a981a7 100644
--- a/aspnetcore/release-notes/aspnetcore-8.0.md
+++ b/aspnetcore/release-notes/aspnetcore-8.0.md
@@ -188,20 +188,11 @@ For more information, see <xref:>.
 
 -->
 
-<!-- UPDATE 8.0
-
-RC1
+### Configure the .NET WebAssembly runtime
 
-### Configure .NET WebAssembly runtime
-
-Coverage TBD
+The .NET WebAssembly runtime can now be configured for Blazor startup.
 
-* Issue: https://github.com/dotnet/aspnetcore/issues/49264
-* PR: https://github.com/dotnet/aspnetcore/pull/49420
-
-For more information, see <xref:>.
-
--->
+For more information, see <xref:blazor/fundamentals/startup?view=aspnetcore-8.0&preserve-view=true#configure-the-net-webAssembly-runtime>.
 
 ### Configuration of connection timeouts in `HubConnectionBuilder`