Blazor ext in service worker assets manifest (#18241)

Author: guardrex

aspnetcore/host-and-deploy/blazor/webassembly.md

@@ -5,7 +5,7 @@ description: Learn how to host and deploy a Blazor app using ASP.NET Core, Conte
 monikerRange: '>= aspnetcore-3.1'
 ms.author: riande
 ms.custom: mvc
-ms.date: 05/07/2020
+ms.date: 05/19/2020
 no-loc: [Blazor, "Identity", "Let's Encrypt", Razor, SignalR]
 uid: host-and-deploy/blazor/webassembly
 ---
@@ -416,12 +416,24 @@ dir .\_framework\_bin | rename-item -NewName { $_.name -replace ".dll\b",".bin"
 ((Get-Content .\_framework\blazor.boot.json -Raw) -replace '.dll"','.bin"') | Set-Content .\_framework\blazor.boot.json
 ```
 
+If service worker assets are also in use, add the following command:
+
+```powershell
+((Get-Content .\service-worker-assets.js -Raw) -replace '.dll"','.bin"') | Set-Content .\service-worker-assets.js
+```
+
 On Linux or macOS:
 
 ```console
 for f in _framework/_bin/*; do mv "$f" "`echo $f | sed -e 's/\.dll\b/.bin/g'`"; done
 sed -i 's/\.dll"/.bin"/g' _framework/blazor.boot.json
 ```
+
+If service worker assets are also in use, add the following command:
+
+```console
+sed -i 's/\.dll"/.bin"/g' service-worker-assets.js
+```
 
 To use a different file extension than *.bin*, replace *.bin* in the preceding commands.
 
@@ -430,6 +442,8 @@ To address the compressed *blazor.boot.json.gz* and *blazor.boot.json.br* files,
 * Remove the compressed *blazor.boot.json.gz* and *blazor.boot.json.br* files. Compression is disabled with this approach.
 * Recompress the updated *blazor.boot.json* file.
 
+The preceding guidance also applies when service worker assets are in use. Remove or recompress *wwwroot/service-worker-assets.js.br* and *wwwroot/service-worker-assets.js.gz*. Otherwise, file integrity checks fail in the browser.
+
 The following Windows example uses a PowerShell script placed at the root of the project.
 
 *ChangeDLLExtensions.ps1:*:
@@ -441,6 +455,12 @@ dir $filepath\bin\Release\$tfm\wwwroot\_framework\_bin | rename-item -NewName {
 Remove-Item $filepath\bin\Release\$tfm\wwwroot\_framework\blazor.boot.json.gz
 ```
 
+If service worker assets are also in use, add the following command:
+
+```powershell
+((Get-Content $filepath\bin\Release\$tfm\wwwroot\service-worker-assets.js -Raw) -replace '.dll"','.bin"') | Set-Content $filepath\bin\Release\$tfm\wwwroot\service-worker-assets.js
+```
+
 In the project file, the script is run after publishing the app:
 
 ```xml