Browser internals

Summary

Interview-level understanding of how the browser actually works — rendering pipeline, event loop, JS engine — questions that separate surface-level users from deep understanders.

• 1Be ready to explain the critical rendering path from memory.
• 2Practice explaining the JS event loop, microtasks vs macrotasks, with a concrete example.
• 3Read a deep-dive article on how your JS engine of choice actually executes code.