How to Build Your First App Using GitHub Copilot in 3 Hours

Building your first app can feel overwhelming, especially if you’re just starting out. But what if I told you that you could leverage AI to help you code it in just three hours? GitHub Copilot is a powerful tool that can assist you in writing code more efficiently. In this guide, I’ll walk you through the process of building a simple app using GitHub Copilot, along with some practical tips and honest insights from our experience.

Prerequisites: What You’ll Need

Before diving in, make sure you have the following:

1. A GitHub Account: Sign up at GitHub if you don’t have one.
2. Visual Studio Code (VS Code): Download and install it from Visual Studio Code.
3. GitHub Copilot Subscription: This currently costs $10/month for individuals, but you can start with a 30-day free trial.
4. Basic Understanding of JavaScript: Familiarity with JavaScript is helpful, but Copilot can guide you through most of it.

Step 1: Setting Up Your Environment (15 minutes)

1. Install VS Code: Open it up and install the GitHub Copilot extension from the Extensions Marketplace.
2. Create a New Project: Start a new folder for your app and create an index.js file where you'll write your code.
3. Initialize Git: Run git init in your project folder to keep track of changes.

Step 2: Use GitHub Copilot to Generate Code (2 hours)

Start Coding

1. Define Your App: Let's say we’re building a simple to-do list app. Begin by typing a comment in your index.js file, like // Create a function to add a task.
2. Let Copilot Assist: As you type, GitHub Copilot will suggest code snippets. Press Tab to accept suggestions or Esc to ignore them.
3. Iterate on Features: Keep defining functions for features like removing tasks, marking tasks as complete, and displaying the task list. For example:
   • // Create a function to remove a task
   • // Create a function to display tasks

Expected Outputs

By the end of this step, you should have a basic implementation of your to-do list app, including functions for adding, removing, and displaying tasks.

Step 3: Testing Your App (30 minutes)

1. Run Your Code: Use the terminal in VS Code to run your index.js file with node index.js.
2. Debugging with Copilot: If you encounter errors, Copilot can help suggest fixes. Simply ask by typing comments like // Fix the error in the add task function.
3. Iterate: Make changes based on your testing and continue using Copilot to refine your app.

Troubleshooting: What Could Go Wrong

• Unintended Code Suggestions: Sometimes, Copilot may suggest code that doesn’t fit your needs. Always review suggested code carefully.
• Dependencies: If you need to use libraries (like Express for a web app), you’ll have to install them separately using npm. Copilot can help with installation commands (e.g., npm install express).

What’s Next: Progression After Your First App

Once you’ve built your first app, consider these next steps:

1. Deploy Your App: Use platforms like Vercel or Heroku for deployment.
2. Enhance Features: Add user authentication or a database to store tasks.
3. Explore More Tools: Look into other AI coding assistants like Tabnine or Replit's Ghostwriter for different perspectives.

Conclusion: Start Here

Building your first app using GitHub Copilot is an attainable goal, especially with the right tools and mindset. Start with a simple project like a to-do list, and leverage Copilot's capabilities to enhance your coding experience. Don’t be afraid to iterate and experiment; that’s part of the learning process.

Remember: GitHub Copilot can help you code faster, but it’s still crucial to understand what the code is doing.