Function tick

packages/svelte/src/internal/client/runtime.js:494–510

()

 * @returns {Promise<void>}
 */
export async function tick() {
	if (async_mode_flag) {
		return new Promise((f) => {
			// Race them against each other - in almost all cases requestAnimationFrame will fire first,
			// but e.g. in case the window is not focused or a view transition happens, requestAnimationFrame
			// will be delayed and setTimeout helps us resolve fast enough in that case
			requestAnimationFrame(() => f());
			setTimeout(() => f());
		});
	}

	await Promise.resolve();

	// By calling flushSync we guarantee that any pending state changes are applied after one tick.
	// TODO look into whether we can make flushing subsequent updates synchronously in the future.
	flushSync();
}

/**
 * Returns a promise that resolves once any state changes, and asynchronous work resulting from them,