Xueersi Online School Tech Team
Jul 3, 2020 · Frontend Development
Understanding Vue.js Dependency Collection and the Observer Pattern
This article explains how Vue.js implements its reactivity system using the observer pattern, detailing the roles of Dep and Watcher classes, the observe function, Object.defineProperty handling for objects and arrays, and providing annotated code examples to illustrate the complete dependency‑collection workflow.
Dependency CollectionObserver PatternReactivity
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