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18 lines
312 B
TypeScript
18 lines
312 B
TypeScript
1 year ago
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import { ref, watch } from 'vue'
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import type { Ref } from 'vue'
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const usePrevious = <T>(state: Ref<T>): T | undefined => {
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const innerState = ref<T>()
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watch(
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() => state.value,
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(newVal, oldVal) => {
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innerState.value = oldVal
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}
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)
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return innerState.value
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}
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export default usePrevious
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