2025 10 04 28 ŁUKASZ NOWAK CONGRESO REACT ALICANTE The international React js conference in Spain

on YouTube ↗14m

" summary

An engineer builds a Chrome extension in TypeScript that manages cookies and manipulates URLs, using an React SPA bundled with Vite for the UI and separate builds for a content script injection. An adapter pattern hides dev-vs-extension differences so local dev uses an iframe via alternate index.html, and automation uses Testing Library selectors to click real pages. The clicker prototype never ships, but cookie tools save three colleagues about seven seconds each workday.

AI-written summary · about

" chapters (7)

1. 0:00Introduction
2. 1:55Browser extension for cookies
3. 3:43Browser extensions basics
4. 5:32Extension with React and Vite
5. 7:41Testing Library automation
6. 10:28Debugging side doors and iframes
7. 12:36Real-world impact

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