usePrevious
Holds the previous value of a ref.
Package: @vueuse/core
Category: Utilities
Usage
import { usePrevious } from '@vueuse/core'
import { shallowRef } from 'vue'
const counter = shallowRef('Hello')
const previous = usePrevious(counter)
console.log(previous.value) // undefined
counter.value = 'World'
console.log(previous.value) // Hello