Vue3 V3 Base

Vue 3 state management uses ref for primitive values and reactive for objects to establish reactive data within the setup function, enabling automatic UI updates when underlying data changes.

Component communication in the Composition API uses props for parent-to-child data passing and emit for child-to-parent events, with additional interaction patterns including slots and template refs for direct access.

Sharing state across components in Vue 3 utilizes the provide and inject functions within the Composition API, allowing ancestor components to serve state to descendants without prop drilling or external libraries.

Lifecycle hooks inside the Vue 3 setup function are imported and called directly, such as using onMounted for initialization logic, replacing the Options API syntax while maintaining the same execution timing.

Vue 3 supports handling Vue Router parameters within the setup context and creating custom component inputs using v-model, integrating seamlessly with Composition API reactive references.

Use Teleport in Vue 3 to render modal components outside the current DOM hierarchy, and use defineExpose to explicitly expose child component methods to parent components, solving specific layout and ref access constraints.