"I Built a Web Browser from Scratch in 42 Days — No Libraries, Just Node.js"

I Built a Web Browser from Scratch in 42 Days 42 days ago I made a decision. I wanted to understand how the internet actually works. Not just use it. Not just build on top of it. Actually understand it — at the wire level. So I started building a web browser from scratch. In Node.js. No external libraries. Every line written by hand. I called it Courage. What Courage can do today ... Parse URLs into protocol, host, port, path Open raw TCP and TLS connections Build and send HTTP GET requests Parse HTTP responses including chunked encoding Tokenize raw HTML character by character Build a DOM tree using a stack Match CSS rules to DOM nodes Calculate layout (x, y, width, height) for every element Paint rectangles and text on a Canvas using Electron Execute JavaScript via eval() Navigate with back, forward, reload Multiple tabs with independent history Render real websites — today it rendered Wikipedia What I learned Before this project I knew how to use the web. Now I understand it. TCP ha