Question

Which option is better to execute window.setTimeout and why?

Option A:

window.setTimeout(somefunc,0);

Option B:

window.setTimeout(somefunc,n); //n may be any number >0

Thanks.

Answer 1

The thing about a timeout or an interval, they always wait for the current thread to run out before they execute their own function- even if you put it in the first line.

var color='white';
setTimeout(function(){alert(color+' from timeout')}, 0);
for(var i=0;i<100001;++i){
    if(i=100000)alert(color='green');
}
alert(color='red')