setInterval function fires WAY too often

[simonw]

Just noticed this:

datasette-ephemeral-tables/datasette_ephemeral_tables/__init__.py

Lines 34 to 45 in 6db14a2

	// Every 1s, update the time remaining
	let interval = setInterval(() => {
	const now = new Date();
	const secondsRemaining = (ephemeralExpiresAt - now) / 1000;
	if (secondsRemaining <= 0) {
	clearInterval(interval);
	timeRemainingDiv.innerText = 'This table has expired';
	} else {
	const timeRemaining = ephemeralFormatSecondsAsMinutesAndSeconds(secondsRemaining);
	timeRemainingDiv.innerText = `This table expires in ${timeRemaining}`;
	}
	});

I didn't pass the time argument, so it runs thousands of times a second.

[simonw]

I'm going to set it to run ever 800ms.

If I run every 1000ms there's always a chance that the timer might jump down two seconds instead of one if I get unlucky with the exact intervals.