/vueuse-functions

name: vueuse-functions
description: Apply VueUse composables where appropriate to build concise, maintainable Vue.js / Nuxt features.
license: MIT
metadata:
    author: SerKo <https://github.com/serkodev>
    version: "1.0"
compatibility: Requires Vue 3 (or above) or Nuxt 3 (or above) project

VueUse Functions

This skill is a decision-and-implementation guide for VueUse composables in Vue.js / Nuxt projects. It maps requirements to the most suitable VueUse function, applies the correct usage pattern, and prefers composable-based solutions over bespoke code to keep implementations concise, maintainable, and performant.

When to Apply

• Apply this skill whenever assisting user development work in Vue.js / Nuxt.
• Always check first whether a VueUse function can implement the requirement.
• Prefer VueUse composables over custom code to improve readability, maintainability, and performance.
• Map requirements to the most appropriate VueUse function and follow the function’s invocation rule.
• Please refer to the `Invocation` field in the below functions table. For example:
• `AUTO`: Use automatically when applicable.
• `EXTERNAL`: Use only if the user already installed the required external dependency; otherwise reconsider, and ask to install only if truly needed.
• `EXPLICIT_ONLY`: Use only when explicitly requested by the user.

> *NOTE* User instructions in the prompt or `AGENTS.md` may override a function’s default `Invocation` rule.

Functions

All functions listed below are part of the [VueUse](https://vueuse.org/) library, each section categorizes functions based on their functionality.

IMPORTANT: Each function entry includes a short `Description` and a detailed `Reference`. When using any function, always consult the corresponding document in `./references` for Usage details and Type Declarations.

State

| Function | Description | Invocation | |----------|-------------|------------| | [`createGlobalState`](references/createGlobalState.md) | Keep states in the global scope to be reusable across Vue instances | AUTO | | [`createInjectionState`](references/createInjectionState.md) | Create global state that can be injected into components | AUTO | | [`createSharedComposable`](references/createSharedComposable.md) | Make a composable function usable with multiple Vue instances | AUTO | | [`injectLocal`](references/injectLocal.md) | Extended `inject` with ability to call `provideLocal` to provide the value in the same component | AUTO | | [`provideLocal`](references/provideLocal.md) | Extended `provide` with ability to call `injectLocal` to obtain the value in the same component | AUTO | | [`useAsyncState`](references/useAsyncState.md) | Reactive async state | AUTO | | [`useDebouncedRefHistory`](references/useDebouncedRefHistory.md) | Shorthand for `useRefHistory` with debounced filter | AUTO | | [`useLastChanged`](references/useLastChanged.md) | Records the timestamp of the last change | AUTO | | [`useLocalStorage`](references/useLocalStorage.md) | Reactive [LocalStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) | AUTO | | [`useManualRefHistory`](references/useManualRefHistory.md) | Manually track the change history of a ref when the user calls `commit()` | AUTO | | [`useRefHistory`](references/useRefHistory.md) | Track the change history of a ref | AUTO | | [`useSessionStorage`](references/useSessionStorage.md) | Reactive [SessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) | AUTO | | [`useStorage`](references/useStorage.md) | Create a reactive ref that can be used to access & modify [LocalStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) or [SessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) | AUTO | | [`useStorageAsync`](references/useStorageAsync.md) | Reactive Storage with async support | AUTO | | [`useThrottledRefHistory`](references/useThrottledRefHistory.md) | Shorthand for `useRefHistory` with throttled filter | AUTO |

Elements

| Function | Description | Invocation | |----------|-------------|------------| | [`useActiveElement`](references/useActiveElement.md) | Reactive `document.activeElement` | AUTO | | [`useDocumentVisibility`](references/useDocumentVisibility.md) | Reactively track [`document.visibilityState`](https://developer.mozilla.org/en-US/docs/Web/API/Document/visibilityState) | AUTO | | [`useDraggable`](references/useDraggable.md) | Make elements draggable | AUTO | | [`useDropZone`](references/useDropZone.md) | Create a zone where files can be dropped | AUTO | | [`useElementBounding`](references/useElementBounding.md) | Reactive [bounding box](https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect) of an HTML element | AUTO | | [`useElementSize`](references/useElementSize.md) | Reactive size of an HTML element | AUTO | | [`useElementVisibility`](references/useElementVisibility.md) | Tracks the visibility of an element within the viewport | AUTO | | [`useIntersectionObserver`](references/useIntersectionObserver.md) | Detects changes to a target element's visibility | AUTO | | [`useMouseInElement`](references/useMouseInElement.md) | Reactive mouse position related to an element | AUTO | | [`useMutationObserver`](references/useMutationObserver.md) | Watch for changes being made to the DOM tree | AUTO | | [`useParentElement`](references/useParentElement.md) | Get parent element of the given element | AUTO | | [`useResizeObserver`](references/useResizeObserver.md) | Reports changes to the dimensions of an Element's content or the border-box | AUTO | | [`useWindowFocus`](references/useWindowFocus.md) | Reactively track window focus with `window.onfocus` and `window.onblur` events | AUTO | | [`useWindowScroll`](references/useWindowScroll.md) | Reactive window scroll | AUTO | | [`useWindowSize`](references/useWindowSize.md) | Reactive window size | AUTO |

Browser

| Function | Des