Last updated Sep 19, 2023

Part 3: Change the front end with UI Kit

This section describes how to use tools in UI Kit, including UI Kit components. You'll use these components to build dynamic and interactive interfaces for your app's front end. When your app is complete, you'll learn how to continue monitoring the Forge environment using the forge logs command.

This is part 3 of 3 in this tutorial. Complete Part 2: Call a Bitbucket API before working on this page.

Modify the user interface

The hello world app renders two Text components in a Bitbucket repository panel. The first Text component displays 'Hello world!'. The second Text component displays the contents of the state variable data if it is defined, otherwise it displays 'Loading...'. You’ll update the app to display the repository full name.

  1. Start the tunnel by running:

    forge tunnel
  2. Navigate to the src/frontend directory and open the index.jsx file.

  3. After fetching the repository in the useEffect hook, store the repository in the data state variable.

  4. Inside the <></> section, modify the second Text component:

    <Text>{data ? `Repository full name: ${data.full_name}` : 'Loading...'}</Text>
  5. Refresh the Bitbucket repository source page.

Your src/frontend/index.jsx file should look like the following:

import React, { useEffect, useState } from "react";
import ForgeReconciler, { Text } from "@forge/react";
import { invoke } from "@forge/bridge";

const App = () => {
  const [data, setData] = useState(null);

  useEffect(async () => {
    const repo = await invoke("fetchRepository");
    console.log(`Repository full name: ${repo.full_name}`);

    const commits = await invoke("fetchCommits", {
      commitsUrl: repo.links.commits.href,
    console.log(`Number of commits: ${commits.values.length}`);
  }, []);

  return (
      <Text>Hello world!</Text>
      <Text>{data ? `Repository full name: ${data.full_name}` : 'Loading...'}</Text>

    <App />

You can view the completed app code in the Bitbucket Forge Hello World repository.

Close the tunnel and deploy the app

After confirming the app works locally, deploy the app so that it continues to work when you close the tunnel.

  1. Close your tunnel by pressing Ctrl+C.

  2. Deploy your app by running:

    forge deploy
  3. Refresh the page where your app is installed.

Check the logs

After you deploy your app, run the forge logs command to view app events. Logs are processed after deployment, so you may need to wait a moment before running the command.

Check for new logs in your development environment by running:

 forge logs

Your logs should look something like the following:

INFO    2023-05-16T03:53:04.192Z 10bc425b-adee-47ff-b9e9-ea3c38ab22e2 Repository full name: workspace/repository

Your logs are an important tool when debugging Forge apps. Learn more about debugging.

View your app in the developer console

Once your app is deployed, it will appear in the developer console. From the console, you can manage and distribute your apps. You can also see how your app is performing, view your app logs and installations, and manage app alerts.

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Next steps

You now know enough to develop your own Forge apps. Learn more from our tutorials, guides, example apps or reference pages.

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