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
37 lines
560 B
Markdown
37 lines
560 B
Markdown
---
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category: '@Math'
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---
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# useSum
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Get the sum of an array reactively
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## Usage
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```ts
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import { useSum } from '@vueuse/math'
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const array = ref([1, 2, 3, 4])
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const sum = useSum(array) // Ref<10>
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```
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```ts
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import { useSum } from '@vueuse/math'
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const a = ref(1)
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const b = ref(3)
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const sum = useSum(a, b, 2) // Ref<6>
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```
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## Type Declarations
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```ts
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export declare function useSum(
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array: MaybeRefOrGetter<MaybeRefOrGetter<number>[]>,
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): ComputedRef<number>
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export declare function useSum(
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...args: MaybeRefOrGetter<number>[]
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): ComputedRef<number>
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```
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