How to Use GitHub Copilot to Build Your First App in 3 Days

Building your first app can feel like climbing a mountain. You might be excited but also overwhelmed by the sheer amount of coding and decision-making involved. What if I told you that a tool like GitHub Copilot could help you cut that time down significantly? In this guide, I'll walk you through how to leverage GitHub Copilot to build an app in just three days, sharing our experiences and the potential pitfalls along the way.

Prerequisites: Get Ready to Code

Before diving in, you’ll need a few things set up:

1. GitHub Account: Sign up for a free account at GitHub.
2. Code Editor: Install Visual Studio Code (VSCode) - it’s free and works seamlessly with GitHub Copilot.
3. GitHub Copilot: Subscribe to GitHub Copilot for $10/mo or $100/yr. They offer a free trial, so you can check it out first.
4. Basic Programming Knowledge: Familiarity with JavaScript or Python will help, but Copilot can assist even if you're a beginner.

Day 1: Setting Up Your Environment

Step 1: Install GitHub Copilot

1. Open VSCode and go to Extensions (Ctrl+Shift+X).
2. Search for “GitHub Copilot” and install it.
3. Sign in with your GitHub account to activate it.

Step 2: Create Your Project

1. Open a new terminal in VSCode.
2. Create a new directory for your app:

   mkdir my-first-app
   cd my-first-app
   

3. Initialize a Git repository:

   git init
   

Step 3: Start Coding Your App

Begin with a simple project. Let’s say you want to build a to-do list app. Create a new file named app.js and start typing a comment like // Create a simple to-do list app. Copilot will suggest code snippets. Accept its suggestions to build the app's structure.

Expected Outputs:

• A basic structure of your app in app.js with functions for adding and removing tasks.

Day 2: Building Features with Copilot

Step 4: Implement Core Features

1. Adding Tasks: Type // function to add tasks and let Copilot suggest the code.
2. Removing Tasks: Repeat the same process for a function to remove tasks.
3. Display Tasks: Create a display function by typing // function to display tasks.

Step 5: Style Your App

1. Create a new file named style.css.
2. Use comments to guide Copilot, e.g., /* style the to-do list */.

Troubleshooting:

• If Copilot’s suggestions aren’t fitting, refine your comments for better context.
• Remember, it doesn’t always get it right. Double-check the logic and syntax.

Day 3: Final Touches and Deployment

Step 6: Testing Your App

1. Test your app locally by running:

   node app.js
   

2. Fix any errors that pop up, using Copilot to help debug by typing comments like // fix errors in adding tasks.

Step 7: Deployment

1. Choose a platform like Vercel (free for personal projects) or Heroku (free tier available).
2. Follow their deployment guides, and Copilot can assist with setting up necessary files like Procfile for Heroku.

What Could Go Wrong:

• Deployment issues can arise if you miss configuration steps. Always read the platform's documentation.

Conclusion: Start Building Today

By following this guide, you can build your first app in just three days using GitHub Copilot. It’s an incredibly powerful tool that can speed up your development process, but it’s not perfect. Expect to spend time refining the code and learning as you go.

What We Actually Use

We rely heavily on GitHub Copilot for rapid prototyping and coding assistance, especially when trying to get through initial development phases quickly. However, we still check the output manually to ensure quality and correctness.

If you’re ready to start building, dive into GitHub Copilot, and let it guide you through your first app.