What are common timer errors in JavaScript?

What are some common timer errors I might encounter in JavaScript?

Common timer errors in JavaScript include issues like timers not firing as expected, delays due to blocking code, and incorrect use of setTimeout and setInterval.

Can you explain why timers might not fire as expected?

Timers may not fire as expected if the JavaScript event loop is blocked by long-running synchronous code, preventing the timer callback from executing.

What about using setInterval? Are there common mistakes with that?

Yes, a common mistake with setInterval is not clearing the interval when it's no longer needed, which can lead to memory leaks and unexpected behavior.

How can I properly clear a timer in JavaScript?

You can clear a timer using clearTimeout for setTimeout and clearInterval for setInterval, passing the timer ID returned by the respective function.