Function waitFor

tests/playwright-utils.ts:143–162

(
	cb: () => ReturnValue | Promise<ReturnValue>,
	{
		errorMessage,
		timeout = 5000,
	}: { errorMessage?: string; timeout?: number } = {},
)

 * throw the error message provided as a fallback
 */
export async function waitFor<ReturnValue>(
	cb: () => ReturnValue | Promise<ReturnValue>,
	{
		errorMessage,
		timeout = 5000,
	}: { errorMessage?: string; timeout?: number } = {},
) {
	const endTime = Date.now() + timeout
	let lastError: unknown = new Error(errorMessage)
	while (Date.now() < endTime) {
		try {
			const response = await cb()
			if (response) return response
		} catch (e: unknown) {
			lastError = e
		}
		await new Promise((r) => setTimeout(r, 100))
	}
	throw lastError
}