4a3ce4cc1d
Add comprehensive reference documentation for: - Vitest: environments, projects/workspaces, type testing, vi utilities - Pinia: HMR, Nuxt integration, SSR setup - Vue: built-in components (Transition, Teleport, Suspense, KeepAlive) and advanced directives
633 B
633 B
category
| category |
|---|
| Utilities |
isDefined
Non-nullish checking type guard for Ref.
Usage
import { isDefined } from '@vueuse/core'
const example = ref(Math.random() ? 'example' : undefined) // Ref<string | undefined>
if (isDefined(example))
example // Ref<string>
Type Declarations
export type IsDefinedReturn = boolean
export declare function isDefined<T>(
v: ComputedRef<T>,
): v is ComputedRef<Exclude<T, null | undefined>>
export declare function isDefined<T>(
v: Ref<T>,
): v is Ref<Exclude<T, null | undefined>>
export declare function isDefined<T>(v: T): v is Exclude<T, null | undefined>