An Animated Guide to Vue 3 Reactivity and Internals
summary
Concrete internals: Vue 3 implements proxies and reflect to intercept reads/writes, using track/trigger effects so dependencies update automatically instead of manual listeners, and stores component deps with weakmap-based cleanup for GC and speed; reactivity lives in a separate package, proxies drop old IE support, demos are written in plain JavaScript and published open source, virtual DOM updates are batched, and server-rendered pages become interactive via hydration — the examples compile and run.
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chapters (5)
- 0:00Start
- 4:51WHAT IS REACTIVITY?
- 11:58HOW DO WATCHERS WORK?
- 16:30HOW DOES THE VIRTUAL DOM WORK?
- 17:50WHAT IS HYDRATION?
