Function debounce

packages/core/utils/shared.ts:9–21

(fn: any, delay = 300, { leading }: { leading?: boolean } = {})

 * @returns A new debounced function
 */
export function debounce(fn: any, delay = 300, { leading }: { leading?: boolean } = {}) {
	let timer: NodeJS.Timeout;
	return (...args: Array<any>) => {
		if (timer === undefined && leading) {
			fn.apply(this, args);
		}
		clearTimeout(timer);
		timer = setTimeout(() => {
			fn.apply(this, args);
			timer = undefined;
		}, delay);
	};
}

/**
 * Creates a throttled function that only invokes the provided function at most once per specified delay