Before you begin developing and or if you are a tester and just need to be running Azure Durable Functions in JavaScript, ensure you have the following prerequisites installed:

1. Node.js (v16 or newer recommended)

   • Download Node.js
   • Check your installation with:

     node -v
     

2. npm (Node Package Manager)

   • npm is bundled with Node.js. Verify with:

     npm -v
     

3. Azure Functions Core Tools (v4 or newer)

   • Enables local development and testing of Azure Functions.
   • Install globally using npm:

     npm install -g azure-functions-core-tools@4 --unsafe-perm true
     

   • Azure Functions Core Tools documentation

4. Azure Durable Functions npm Package

   • Required for creating orchestrations and activities.

     npm install durable-functions
     

5. Azurite (Optional, for Local Azure Storage Emulator)

   • Useful for emulating Azure Blob/Queue/Table storage locally.

     npm install -g azurite
     

   • Azurite documentation

6. Azure Storage Explorer (Recommended)

   • A free tool for managing your Azure Storage accounts and local Azurite emulator.
   • Download: Azure Storage Explorer
   • Allows you to browse, upload, and download blobs, queues, and tables.

7. An IDE or Code Editor

   • Visual Studio Code is highly recommended.

8. An Azure Account (Optional for deployment)

   • Sign up for a free Azure account
   • Not required for local development and testing.

After installing these prerequisites, you’re ready to create and run Azure Durable Functions in JavaScript!