How to use this Teams Tab app HelloWorld app

Microsoft Teams supports the ability to run web-based UI inside "custom tabs" that users can install either for just themselves (personal tabs) or within a team or group chat context.

Prerequisites

• NodeJS
• An M365 account. If you do not have M365 account, apply one from M365 developer program
• Teams Toolkit Visual Studio Code Extension version after 1.55 or TeamsFx CLI

Debug

• From Visual Studio Code: Start debugging the project by hitting the F5 key in Visual Studio Code.
• Alternatively use the Run and Debug Activity Panel in Visual Studio Code and click the Run and Debug green arrow button.
• From TeamsFx CLI: Start debugging the project by executing the command teamsfx preview --local in your project directory.

Edit the manifest

You can find the Teams app manifest in templates/appPackage folder. The folder contains two manifest files:

• manifest.local.template.json: Manifest file for Teams app running locally.
• manifest.remote.template.json: Manifest file for Teams app running remotely (After deployed to Azure).

Both files contain template arguments with {...} statements which will be replaced at build time. You may add any extra properties or permissions you require to this file. See the schema reference for more information.

Deploy to Azure

Deploy your project to Azure by following these steps:

From Visual Studio Code

From TeamsFx CLI

Open Teams Toolkit, and sign into Azure by clicking the Sign in to Azure under the ACCOUNTS section from sidebar. After you signed in, select a subscription under your account. Open the Teams Toolkit and click Provision in the cloud from DEVELOPMENT section or open the command palette and select: Teams: Provision in the cloud. Open the Teams Toolkit and click Deploy to the cloud or open the command palette and select: Teams: Deploy to the cloud.

Run command teamsfx account login azure. Run command teamsfx account set --subscription <your-subscription-id>. Run command teamsfx provision. Run command: teamsfx deploy.

Note: Provisioning and deployment may incur charges to your Azure Subscription.

Preview

Once the provisioning and deployment steps are finished, you can preview your app:

• From Visual Studio Code

  1. Open the Run and Debug Activity Panel.
  2. Select Launch Remote (Edge) or Launch Remote (Chrome) from the launch configuration drop-down.
  3. Press the Play (green arrow) button to launch your app - now running remotely from Azure.

• From TeamsFx CLI: execute teamsfx preview --remote in your project directory to launch your application.

Validate manifest file

To check that your manifest file is valid:

• From Visual Studio Code: open the Teams Toolkit and click Validate manifest file or open the command palette and select: Teams: Validate manifest file.
• From TeamsFx CLI: run command teamsfx validate in your project directory.

Package

• From Visual Studio Code: open the command palette and select Teams: Zip Teams metadata package.
• Alternatively, from the command line run teamsfx package in the project directory.

Publish to Teams

Once deployed, you may want to distribute your application to your organization's internal app store in Teams. Your app will be submitted for admin approval.

• From Visual Studio Code: open the Teams Toolkit and click Publish to Teams or open the command palette and select: Teams: Publish to Teams.
• From TeamsFx CLI: run command teamsfx publish in your project directory.