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Build your first message extension app using JavaScript

Start Microsoft Teams app development with your first Teams app using JavaScript.

In this tutorial, you'll learn:

  • How to set up a new project with Teams Toolkit.
  • How to build a message extension app.
  • How to deploy your app.

This step-by-step guide helps you to build a message extension Teams app with Teams Toolkit in Visual Studio Code. You'll see the following output after you complete this guide:

Screenshot shows the final output of the message extension app in Teams.