What actually happens when you open a website?
A browser turns a URL into a sequence of network, security and rendering steps. Understanding that sequence makes web development less mysterious.
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- DNS resolves a human-readable hostname to an address.
- The browser establishes a connection and negotiates HTTPS when applicable.
- An HTTP request asks the server for a resource; the response carries status, headers and content.
- The browser parses HTML, discovers CSS and JavaScript, builds the page and paints pixels.