setTimeout and setInterval
setTimeout
Caveat: The this object for the function
passed to setTimeout is always the window
that setTimeout was called on.
Caveat: The delay is clamped from below, to 10ms in
some browsers, 4ms in others, 2ms in still others, 1ms in some.
setInterval
Just like setTimeout, but fires over and
over again until canceled. The firing times may differ for an interval
and a timeout that resets itself.
Canceling intervals and timeouts
Both setTimeout
and setInterval return a handle that can be used to cancel the
timer using clearTimeout and clearInterval
respectively.
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