How to Use GitHub Copilot to Write a Full Web App in 4 Hours

Building a web app can feel daunting, especially if you're a solo founder or indie hacker juggling multiple responsibilities. But what if I told you that you could leverage AI to help you write that app in just four hours? Enter GitHub Copilot, a tool that uses machine learning to assist you in coding. This isn't just another buzzword; it’s a practical solution that can save you time and help you focus on what truly matters: getting your MVP out the door.

Prerequisites

Before diving in, make sure you have the following:

• Basic knowledge of JavaScript: You’ll be using it to create your web app.
• Node.js installed: Essential for running your JavaScript code.
• GitHub account: You need this for Copilot.
• Visual Studio Code: This is where you'll be coding.
• GitHub Copilot subscription: Costs $10/month or $100/year.

Step 1: Set Up Your Environment (30 minutes)

1. Install Visual Studio Code: Download it from Visual Studio Code.

2. Install GitHub Copilot:

   • Go to the Extensions Marketplace in VS Code.
   • Search for "GitHub Copilot" and install it.
   • Sign in with your GitHub account.

3. Create a New Project:

   • Open a terminal in VS Code and run mkdir my-web-app && cd my-web-app.
   • Initialize a new Node.js project with npm init -y.

Step 2: Define Your App (30 minutes)

At this stage, you should outline the functionality of your web app. Let's say you want to build a simple task manager.

1. Create a new file called app.js and start defining your basic routes:

   const express = require('express');
   const app = express();
   app.use(express.json());
   

2. Use GitHub Copilot to generate the rest of your app. Start typing comments, and Copilot will suggest code. For example, type // create a route to get tasks and see what it proposes.

Step 3: Build the Core Features (2 hours)

1. CRUD Operations: With Copilot, you can quickly implement Create, Read, Update, and Delete operations. Here’s a snippet to get you started:

   const tasks = [];
   
   // Get all tasks
   app.get('/tasks', (req, res) => {
       res.json(tasks);
   });
   
   // Add a new task
   app.post('/tasks', (req, res) => {
       const task = req.body;
       tasks.push(task);
       res.status(201).json(task);
   });
   

2. Testing Your Endpoints: Use Postman or Insomnia to test your API endpoints. Copilot can even help you write tests. Just type // test the get tasks endpoint and see what it suggests.

3. Frontend Development: If you want to add a simple frontend, create an index.html file. Use Copilot to generate a basic HTML structure:

   <!DOCTYPE html>
   <html lang="en">
   <head>
       <meta charset="UTF-8">
       <title>Task Manager</title>
   </head>
   <body>
       <h1>Task Manager</h1>
       <script src="script.js"></script>
   </body>
   </html>
   

Step 4: Final Touches and Deployment (1 hour)

1. Add Styling: Use CSS for basic styling. Copilot can help generate styles based on your comments.

2. Deploy Your App:

   • Use Vercel or Heroku for easy deployment. Both have free tiers.
   • If using Vercel, run vercel in your terminal after logging in.

Troubleshooting

Common Issues

• Copilot Not Suggesting Code: Ensure you’re connected to the internet and have an active subscription.
• Errors on Deployment: Check your environment variables and ensure you’re running the correct Node.js version.

What's Next?

Congratulations, you’ve built a web app in four hours! Now, consider adding more features, integrating a database like MongoDB, or even exploring user authentication. If you need more guidance, check out our weekly podcast, Built This Week, where we discuss tools and strategies that actually work for builders like you.

Conclusion: Start Here

If you’re ready to take the plunge, start by setting up your environment as outlined above. GitHub Copilot can significantly speed up your development process, allowing you to focus on building a product that solves real problems for your users.

What We Actually Use

In our experience, GitHub Copilot is an essential tool for speeding up development, especially when combined with a solid understanding of JavaScript and Node.js. For deployment, we typically use Vercel for its simplicity and quick setup.