37 lines
541 B
Markdown
37 lines
541 B
Markdown
---
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category: Reactivity
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---
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# refDefault
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Apply default value to a ref.
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## Usage
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```ts
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import { refDefault, useStorage } from '@vueuse/core'
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const raw = useStorage('key')
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const state = refDefault(raw, 'default')
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raw.value = 'hello'
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console.log(state.value) // hello
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raw.value = undefined
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console.log(state.value) // default
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```
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## Type Declarations
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```ts
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/**
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* Apply default value to a ref.
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*
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* @__NO_SIDE_EFFECTS__
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*/
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export declare function refDefault<T>(
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source: Ref<T | undefined | null>,
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defaultValue: T,
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): Ref<T>
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```
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