This content originally appeared on DEV Community and was authored by Mst Surnaly Akter
When we type a URL and press Enter, a lot happens behind the scenes:
- DNS Lookup → Finds the server’s IP
- Request → Sends HTTP/HTTPS request to the server
- Response → Server sends back HTML, CSS, JS, images
- Parsing → HTML → DOM CSS → CSSOM JS → executed by JavaScript engine
- Render Tree → Combines DOM + CSSOM
- Layout → Calculates size & position of elements
- Painting → Draws pixels on the screen
- Compositing → Layers combined for smooth rendering
Browsers also manage caching, security, and optimization to keep things fast & safe.
Every website you visit runs through this pipeline in milliseconds!
hashtag#WebDevelopment hashtag#Frontend hashtag#BrowserInternals

This content originally appeared on DEV Community and was authored by Mst Surnaly Akter
Mst Surnaly Akter | Sciencx (2025-09-21T02:31:00+00:00) How does a browser work under the hood?. Retrieved from https://www.scien.cx/2025/09/21/how-does-a-browser-work-under-the-hood/
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