javascript - 'setInterval' vs 'setTimeout'

What is the main difference between

setInterval

and

setTimeout

in JavaScript?

Answer

setTimeout(expression, timeout); runs the code/function once after the timeout.

setInterval(expression, timeout); runs the code/function in intervals, with the length of the timeout between them.

Example:

var intervalID = setInterval(alert, 1000); // Will alert every second.
// clearInterval(intervalID); // Will clear the timer.


setTimeout(alert, 1000); // Will alert once, after a second.