33 lines
799 B
JavaScript
33 lines
799 B
JavaScript
import {useRef, useCallback} from 'react'
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// Wraps the register callback from useForm into a new ref function, such that
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// any child of the provided element that is an input component will be
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// registered.
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export function findInput(register) {
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return (element) => {
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const found = element ? element.querySelector('input, textarea, select, checkbox') : null
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register(found)
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}
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}
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// Generates pairs from the input iterable
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export function* pairwise(it) {
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let lastValue
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let firstRound = true
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for (const i of it) {
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if (firstRound) {
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firstRound = false
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} else {
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yield [lastValue, i]
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}
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lastValue = i
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}
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}
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export function useCallbackRef(fn) {
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const fnRef = useRef()
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fnRef.current = fn
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return useCallback(((...args) => fnRef.current(...args)), [])
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}
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