one

Version:

One is a React framework for web, iOS, and Android apps.

30 lines (27 loc) • 837 B

JavaScript

import { useRef, useState } from "react";

function useControlled(onChange, revision = 0) {
	if (!Number.isInteger(revision) || revision < 0 || revision > 2147483647) {
		throw new Error("Control revision must be a nonnegative Int32");
	}
	const received = useRef({
		eventCount: 0,
		revision
	});
	const [acknowledged, setAcknowledged] = useState(received.current);
	return {
		revision,
		acknowledgedEvent: acknowledged.revision === revision ? acknowledged.eventCount : 0,
		onNativeChange(event) {
			if (event.revision !== revision) return;
			if (received.current.revision === revision && event.eventCount <= received.current.eventCount) return;
			received.current = event;
			try {
				onChange(event);
			} finally {
				setAcknowledged(event);
			}
		}
	};
}

export { useControlled };
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