safe interval

gistfile1.txt

// exception won't break the next run
// guarantees at least `waitMs` milliseconds between each run
export function safeInterval(fn, waitMs, leading = false) {
	let _stop = false
	if (leading) {
		run()
	}

	function run() {
		try {
			fn()
		} catch (err) {
			// eslint-disable-next-line no-console
			console.error('safeInterval error', err)
		}
	}

	const runHelper = () => {
		const timeout = setTimeout(() => {
			if (_stop) {
				clearTimeout(timeout)
				return
			}

			run()
			runHelper()
		}, waitMs)
	}

	runHelper()

	// return a stopper
	return () => {
		_stop = true
	}
}