How to Use GitHub Copilot to Write a Simple Web App in 2026

If you're a solo founder or indie hacker, you know how daunting the coding part of building a web app can be. You might have ideas swirling in your head, but translating that into code? That's where the struggle often lies. Enter GitHub Copilot—an AI-powered pair programmer that can help you write code faster and more efficiently. In this guide, I’ll walk you through how to use GitHub Copilot to build a simple web app in just three hours.

Time Estimate and Prerequisites

You can finish this project in about 3 hours if you have a basic understanding of JavaScript and web development.

Prerequisites:

• An active GitHub account (Free, Pro: $4/mo)
• Visual Studio Code (Free)
• Node.js installed on your machine (Free)
• Basic knowledge of HTML, CSS, and JavaScript

Step 1: Setting Up Your Environment

Before diving into the code, let’s set up your development environment.

1. Install Visual Studio Code: Download and install Visual Studio Code.
2. Install GitHub Copilot: You can find GitHub Copilot in the Visual Studio Code Marketplace. The pricing is $10/month after a 60-day free trial.
3. Create a New Project:
   • Open Visual Studio Code and create a new folder for your project.
   • Open the terminal and run npm init -y to set up a new Node.js project.

Expected Output:

You should have a folder with a package.json file inside it.

Step 2: Writing Your Web App Code

Now, let’s get to the fun part—writing the code. We’ll build a simple "To-Do List" app.

1. Create index.html:

   • In your project folder, create a file named index.html.
   • Start typing <!DOCTYPE html> and let Copilot suggest the rest. Accept the suggestions.

2. Create style.css:

   • Create a style.css file and use Copilot to suggest basic styles. Type body { and see what it suggests.

3. Create app.js:

   • Create a file named app.js.
   • Start with function addTask() and let Copilot fill in the logic for adding tasks to your list.

Expected Outputs:

• Your index.html should include a simple structure with a form for adding tasks.
• The style.css should contain basic styles for your app.
• The app.js should have logic to handle adding and removing tasks.

Step 3: Running Your App

To see your app in action, you can use a live server extension in Visual Studio Code.

1. Install Live Server: Find and install the Live Server extension in the marketplace.
2. Run Your App: Right-click index.html and select "Open with Live Server".

Troubleshooting:

• If your app doesn’t load, check the console for errors.
• Ensure all files are linked correctly in index.html.

What Could Go Wrong

1. Copilot Suggests Incorrect Code: Always double-check the code Copilot generates. It’s smart but not infallible.
2. Dependency Issues: If you run into issues with packages, ensure you have the correct versions in your package.json.

What’s Next

Once you've built your To-Do List app, consider enhancing it with features like:

• Saving tasks to local storage.
• Adding user authentication.
• Deploying your app using platforms like Vercel or Netlify.

Tool Comparison: GitHub Copilot vs. Other AI Code Assistants

| Tool | Pricing | Best For | Limitations | Our Verdict | |--------------------|--------------------------|-------------------------------|--------------------------------------|--------------------------------------| | GitHub Copilot | $10/mo after trial | Pair programming for web dev | Limited context understanding | Best for quick coding help | | Tabnine | Free tier + $12/mo Pro | AI-assisted coding in multiple languages | Less JavaScript focus | Good for multi-language projects | | Codeium | Free | Basic code suggestions | Limited advanced features | Good for beginners | | Replit | Free + $20/mo Pro | Collaborative coding | Less advanced AI suggestions | Great for team projects | | OpenAI Codex | Pay-as-you-go | Advanced AI coding tasks | Pricing can get high with usage | Best for complex tasks |

What We Actually Use

We primarily use GitHub Copilot for its integration with our workflow and its ability to generate JavaScript code quickly. However, for multi-language projects, we find Tabnine handy as a complementary tool.

Conclusion: Start Here

If you're looking to fast-track your web app development, start with GitHub Copilot. It's not just a gimmick; it can significantly reduce the time you spend on coding. Just remember to review the code it generates and don’t hesitate to tweak it to suit your needs.

Ready to build your first web app? Grab GitHub Copilot and let’s get coding!