edits

Author: diberry

articles/azure-signalr/signalr-quickstart-azure-functions-javascript.md

@@ -1,5 +1,5 @@
 ---
-title: Azure SignalR Service serverless quickstart - Javascript
+title: Azure SignalR Service serverless quickstart - JavaScript
 description: A quickstart for using Azure SignalR Service and Azure Functions to create an App showing GitHub star count using JavaScript.
 author: vicancy
 ms.author: lianwei
@@ -9,9 +9,9 @@ ms.service: signalr
 ms.devlang: javascript
 ms.custom: devx-track-js, mode-api
 ---
-# Quickstart: Create a serverless app with Azure Functions and SignalR Service using Javascript
+# Quickstart: Create a serverless app with Azure Functions and SignalR Service using JavaScript
 
- In this article, you'll use Azure SignalR Service, Azure Functions, and JavaScript to build a serverless application to broadcast messages to clients.
+ In this article, you use Azure SignalR Service, Azure Functions, and JavaScript to build a serverless application to broadcast messages to clients.
 
 ## Prerequisites
 
@@ -20,11 +20,11 @@ This quickstart can be run on macOS, Windows, or Linux.
 | Prerequisite | Description |
 | --- | --- |
 | An Azure subscription |If you don't have a subscription, create an [Azure free account](https://azure.microsoft.com/free/?WT.mc_id=A261C142F)|
-| A code editor | You'll need a code editor such as [Visual Studio Code](https://code.visualstudio.com/). |
+| A code editor | You need a code editor such as [Visual Studio Code](https://code.visualstudio.com/). |
 | [Azure Functions Core Tools](https://github.com/Azure/azure-functions-core-tools#installing)| Requires version 4.0.5611 or higher to run Node.js v4 programming model.|
 |[Node.js LTS](https://nodejs.org/en/download/)| See supported node.js versions in the [Azure Functions JavaScript developer guide](../azure-functions/functions-reference-node.md#node-version).|
-| [Azurite](../storage/common/storage-use-azurite.md)| SignalR binding needs Azure Storage.  You can use a local storage emulator when a function is running locally. |
-| [Azure CLI](/cli/azure/install-azure-cli)| Optionally, you can use the Azure CLI to create an Azure SignalR Service instance. |
+| [Azurite](../storage/common/storage-use-azurite.md)| SignalR binding needs Azure Storage. You can use a local storage emulator when a function is running locally. |
+| [Azure CLI](/cli/azure/install-azure-cli)| Optionally, you can use the Azure CLI to create an Azure SignalR Service instance. 
 
 ## Create an Azure SignalR Service instance
 
@@ -39,7 +39,6 @@ Make sure you have Azure Functions Core Tools installed.
 1. Run the Azure Functions `func init` command to initialize a new project.
 
   ```bash
-  # Initialize a function project
   func init --worker-runtime javascript --language javascript --model V4
   ```
 
@@ -51,7 +50,7 @@ After you initialize a project, you need to create functions. This project requi
 - `negotiate`: Allows a client to get an access token.
 - `broadcast`: Uses a time trigger to periodically broadcast messages to all clients.
 
-When you run the `func new` command from the root directory of the project, the Azure Functions Core Tools creates the function source files storing them in a folder with the function name.  You'll edit the files as necessary replacing the default code with the app code.
+When you run the `func new` command from the root directory of the project, the Azure Functions Core Tools creates the function source files storing them in a folder with the function name.  You edit the files as necessary replacing the default code with the app code.
 
 ### Create the index function
 
@@ -63,7 +62,7 @@ When you run the `func new` command from the root directory of the project, the
 
 1. Edit *src/functions/httpTrigger.js* and replace the contents with the following json code:
 
-  :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/index.js":::
+    :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/index.js":::
 
 
 ### Create the negotiate function
@@ -76,7 +75,7 @@ When you run the `func new` command from the root directory of the project, the
 
 1. Edit *src/functions/negotiate.js* and replace the contents with the following json code:
 
-  :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/negotiate.js":::
+    :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/negotiate.js":::
 
 ### Create a broadcast function.
 
@@ -88,7 +87,7 @@ When you run the `func new` command from the root directory of the project, the
 
 1. Edit *src/functions/broadcast.js* and replace the contents with the following code:
 
-  :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/broadcast.js":::
+    :::code language="javascript" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/functions/broadcast.js":::
 
 ### Create the index.html file
 
@@ -100,13 +99,32 @@ The client interface for this app is a web page. The `index` function reads HTML
 
     :::code language="html" source="~/azuresignalr-samples/samples/QuickStartServerless/javascript/v4-programming-model/src/content/index.html":::
 
-### Add the SignalR Service connection string to the function app settings
+### Setup Azure Storage
 
-Azure Functions requires a storage account to work. You can install and run the [Azure Storage Emulator](../storage/common/storage-use-azurite.md). **Or** you can update the setting to use your real storage account with the following command:
+Azure Functions requires a storage account to work. Choose either of the two following options:
 
-    ```bash
-    func settings add AzureWebJobsStorage "<storage-connection-string>"
-    ```
+* Run the free [Azure Storage Emulator](../storage/common/storage-use-azurite.md).
+* Use the Azure Storage service. This may incur costs if you continue to use it.
+
+#### [Local emulation](#tab/storage-azurite) 
+
+1. Start the Azurite storage emulator:
+
+  ```bash
+  azurite -l azurite -d azurite\debug.log
+  ```
+
+1. Make sure the `AzureWebJobsStorage` in *local.settings.json* set to `UseDevelopmentStorage=true`.
+
+#### [Azure Blob Storage](#tab/azure-blob-storage) 
+
+Update the project to use the Azure Blob Storage connection string.
+
+```bash
+func settings add AzureWebJobsStorage "<storage-connection-string>"
+```
+
+### Add the SignalR Service connection string to the function app settings
 
 You're almost done now. The last step is to set the SignalR Service connection string in Azure Function app settings.
 
@@ -117,36 +135,29 @@ You're almost done now. The last step is to set the SignalR Service connection s
 
 1. Copy the primary connection string, and execute the command:
 
-  ```bash
-  func settings add AzureSignalRConnectionString "<signalr-connection-string>"
-  ```
+    ```bash
+    func settings add AzureSignalRConnectionString "<signalr-connection-string>"
+    ```
   
 ### Run the Azure Function app locally
 
-Start the Azurite storage emulator:
-
-  ```bash
-  azurite -l azurite -d azurite\debug.log
-  ```
-
 Run the Azure Function app in the local environment:
 
   ```bash
   func start
   ```
 
-> [!NOTE]
-> If you see an errors showing read errors on the blob storage, ensure the 'AzureWebJobsStorage' setting in the *local.settings.json* file is set to `UseDevelopmentStorage=true`.
-
 After the Azure Function is running locally, go to `http://localhost:7071/api/index`. The page displays the current star count for the GitHub Azure/azure-signalr repository. When you star or unstar the repository in GitHub, you'll see the refreshed count every few seconds.
 
-Having issues? Try the [troubleshooting guide](signalr-howto-troubleshoot-guide.md) or [let us know](https://aka.ms/asrs/qscsharp)
+Having issues? Try the [troubleshooting guide](signalr-howto-troubleshoot-guide.md) or [let us know.](https://aka.ms/asrs/qscsharp)
 
 [!INCLUDE [Cleanup](includes/signalr-quickstart-cleanup.md)]
 
 ## Sample code
 
-You can get all code used in the article from [GitHub](https://github.com/aspnet/AzureSignalR-samples/tree/main/samples/QuickStartServerless/javascript/v4-programming-model).
+You can get all code used in the article from GitHub repository: 
+
+* [aspnet/AzureSignalR-samples](https://github.com/aspnet/AzureSignalR-samples/tree/main/samples/QuickStartServerless/javascript/v4-programming-model).
 
 ## Next steps