Understand each stage of the Vue 3 component lifecycle using the Composition API—creation, mounting, updating and unmounting—and the corresponding hook.

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Vue 3 components follow a predictable lifecycle with four main phases: creation, mounting, updating, and unmounting. The Composition API provides lifecycle hooks like setup(), onMounted(), onBeforeUpdate(), onUpdated(), onBeforeUnmount(), and onUnmounted() that allow developers to execute custom code at specific stages. Additional hooks like onRenderTracked(), onActivated(), and onErrorCaptured() support advanced use cases including debugging, KeepAlive components, and error handling. Best practices include pairing setup and cleanup logic, avoiding heavy operations in update hooks, and leveraging Vue's reactivity system instead of manual state management.

Vue Basics: Mastering the Vue Lifecycle Hooks