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Fluent UI React in Office Add-ins
Learn how to create an Office Add-in that uses Fluent UI React.
10/17/2023
how-to
microsoft-365
medium

Use Fluent UI React in Office Add-ins

Fluent UI React is the official open-source JavaScript front-end framework designed to build experiences that fit seamlessly into a broad range of Microsoft products, including Microsoft 365 applications. It provides robust, up-to-date, accessible React-based components which are highly customizable using CSS-in-JS.

Note

This article describes the use of Fluent UI React in the context of Office Add-ins. However, it's also used in a wide range of Microsoft 365 apps and extensions. For more information, see Fluent UI React and the Fluent UI Web open source repository.

This article describes how to create an add-in that's built with React and that uses Fluent UI React components.

Create an add-in project

You'll use the Yeoman generator for Office Add-ins to create an add-in project that uses React.

Install the prerequisites

[!INCLUDE Yeoman generator prerequisites]

Create the project

[!INCLUDE Yeoman generator create project guidance]

  • Choose a project type: Specify Office Add-in Task Pane project using React framework.
  • Choose a script type: Specify either TypeScript or JavaScript.
  • What do you want to name your add-in? Specify My Office Add-in.
  • Which Office client application would you like to support? Specify one of the hosts. (The screenshots in this article use Word. Running the project for the first time is easier if you select Excel, PowerPoint, or Word. See Try it out.)

The following is an example.

The Yeoman generator in a command line interface with the prompts and answers.

After you complete the wizard, the generator creates the project and installs supporting Node components.

[!INCLUDE Yeoman generator next steps]

Note

Fluent UI React v9 or later isn't supported with the Trident (IE) or EdgeHTML (Edge Legacy) webview controls. If your version of Office is using either of those, the task pane of the add-in generated by Yo Office simply contains a message to upgrade your version of Office. For more information, see Browsers and webview controls used by Office Add-ins.

Explore the project

The add-in project that you've created with the Yeoman generator contains sample code for a basic task pane add-in. If you'd like to explore the components of your add-in project, open the project in your code editor and review the following files. The file name extensions depend on which language you choose. TypeScript extensions are in parentheses. When you're ready to try out your add-in, proceed to the next section.

  • The ./manifest.xml file in the root directory of the project defines the settings and capabilities of the add-in. To learn more about the manifest.xml file, see Office Add-ins XML manifest.
  • The ./src/taskpane/taskpane.html file contains the HTML markup for the task pane and loads the Office JavaScript Library. It also tests whether the webview control supports Fluent UI React v9 and displays a special message if it doesn't.
  • The ./src/taskpane/index.jsx (tsx) file is the React root component. It loads React and Fluent UI React, ensures that the Office JavaScript library has been loaded, and applies the Fluent-defined theme.
  • The ./src/taskpane/office-document.js (ts) file contains the Office JavaScript API code that facilitates interaction between the task pane and the Office client application.
  • The ./src/taskpane/components/ folder contains the React component *.jss (tsx) files that create the UI.

Try it out

  1. Navigate to the root folder of the project.

    cd "My Office Add-in"

  2. Complete the following steps to start the local web server and sideload your add-in. [!INCLUDE alert use https]

    [!TIP] If you're testing your add-in on Mac, run the following command before proceeding. When you run this command, the local web server starts.

    npm run dev-server

    • To test your add-in, run the following command in the root directory of your project. This starts the local web server and opens the Office host application with your add-in loaded.

      npm start

    • To test your add-in in Office on the web, run the following command in the root directory of your project. When you run this command, the local web server starts. Replace "{url}" with the URL of a Word document on your OneDrive or a SharePoint library to which you have permissions.

      [!INCLUDE npm start:web command syntax]

    [!NOTE] If this is the first time that you have sideloaded an Office add-in on your computer (or the first time in over a month), you're prompted first to delete an old certificate and then to install a new one. Agree to both prompts.

  3. A WebView Stop On Load prompt appears. Select OK.

  4. If the "My Office Add-in" task pane isn't already open, choose the Home tab, and then choose the Show Taskpane button on the ribbon to open the add-in task pane.

  5. Enter text into the text box and then select Insert text.

Custom text inserted into the document after selecting the Insert button from the add-in task pane.

Migrate to Fluent UI React v9

If you have an existing add-in that implements an older version of Fluent UI React, we recommend migrating to Fluent UI v9. For guidance on the migration process, see Getting started migrating to v9.

See also