Understand the mechanics behind how the web works from DNS lookups, TCP/IP, and HTTP/3 lifecycles to browser rendering engines, Critical Rendering Paths, DOM/BOM architecture, and Chrome DevTools performance profiling.
The Complete Step-by-Step Lifecycle from Keystroke to First Pixel Rendered
Understanding Clients, Origin Servers, Reverse Proxies, CDNs, and Stateless Protocols
The Evolution of Web Protocols: Multiplexing, Binary Framing, HPACK/QPACK, and UDP Transport
Public Key Infrastructure, Certificate Authorities, Asymmetric Encryption, and Security Headers
Browser Process, Renderer Process, GPU Compositing, IPC, and Site Isolation
From HTML Tokens to Pixels: DOM, CSSOM, Render Tree, Layout, Paint, and Compositing
Understanding Synchronous Scripts, Async Downloads, Defer Execution Order, and Module Scripts
Hardware Acceleration, Layer Promotion, transform/opacity vs top/left, and will-change
Document, Element, Text & Comment Nodes, Live vs Static Collections, and DocumentFragment
The 3 Event Phases, Event Delegation Patterns, and stopPropagation vs stopImmediatePropagation
Window, Navigator, Location, History API (pushState/replaceState), and Viewport Metrics
Capacity, Lifecycle, Sync vs Async I/O, Security Flags (HttpOnly, SameSite), and Cache API
DOM Mutation Breakpoints, Conditional Breakpoints, Logpoints, Call Stacks, and Blackboxing
Analyzing Queuing, DNS, TLS, TTFB, Content Download, Resource Priorities, and HAR Exports
CPU Flame Charts, Long Tasks (>50ms), Total Blocking Time (TBT), Heap Snapshots, and Detached DOM Nodes
Hands-on Project: Handling 10,000 Items with Batching, DocumentFragments, and Zero Memory Leaks
25 Curated FAANG Interview Questions & Real-World System Scenarios