50 lines
855 B
Markdown
50 lines
855 B
Markdown
---
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category: '@Math'
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---
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# usePrecision
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Reactively set the precision of a number.
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## Usage
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```ts
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import { usePrecision } from '@vueuse/math'
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const value = ref(3.1415)
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const result = usePrecision(value, 2) // 3.14
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const ceilResult = usePrecision(value, 2, {
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math: 'ceil'
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}) // 3.15
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const floorResult = usePrecision(value, 3, {
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math: 'floor'
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}) // 3.141
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```
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## Type Declarations
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```ts
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export interface UsePrecisionOptions {
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/**
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* Method to use for rounding
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*
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* @default 'round'
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*/
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math?: "floor" | "ceil" | "round"
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}
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/**
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* Reactively set the precision of a number.
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*
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* @see https://vueuse.org/usePrecision
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*
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* @__NO_SIDE_EFFECTS__
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*/
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export declare function usePrecision(
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value: MaybeRefOrGetter<number>,
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digits: MaybeRefOrGetter<number>,
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options?: MaybeRefOrGetter<UsePrecisionOptions>,
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): ComputedRef<number>
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```
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