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Browser & Performance — Module Guide
12 guided topics from the Senior Frontend Engineer Interview Preparation Sheet (v7.0). Each page follows the same guide format as the TypeScript module: definitions, examples, interview callouts, and a senior summary.
| ID | Level | Topic |
|---|---|---|
| 01 | Easy | CORS preflight |
| 02 | Medium | Browser rendering pipeline |
| 03 | Medium | Web Workers |
| 04 | Hard | URL to pixels (DNS → render) |
| 05 | Hard | V8 optimization |
| 06 | Hard | Memory leaks in SPAs |
| 07 | Easy | preload / prefetch / preconnect |
| 08 | Medium | LCP, INP & CLS |
| 09 | Medium | Long Tasks observer |
| 10 | Hard | Virtualise 100k live rows |
| 11 | Hard | Code splitting strategies |
| 12 | Hard | Critical rendering path |
Use the sidebar to open any topic—read the guide and solution on its own page.