An Animated Guide to Vue 3 Reactivity and Internals
summary
Explains how Vue 3 actually implements reactivity: proxies as core detection intercept get/set, the runtime records dependencies with maps and sets and uses WeakMap-based dependency tracking so unused components are GC-friendly, and effects are tracked and triggered only when old !== new. Notes the code split: reactivity package split out for non-DOM use, shows animated JavaScript demos (all open source) and covers virtual DOM batching plus hydration for server-rendered pages.
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chapters (5)
- 0:00Start
- 2:18WHAT IS REACTIVITY?
- 10:40HOW DO WATCHERS WORK?
- 15:31HOW DOES THE VIRTUAL DOM WORK?
- 17:02WHAT IS HYDRATION?
