In javascript, why does this code work?
var myVar=setInterval(
function(){
myTimer()
},1000
);
function myTimer()
{
var d=new Date();
var t=d.toLocaleTimeString();
document.getElementById("demo").innerHTML=t; //displays time
dpcument.getElementById("demo2").innerHTML = myVar; //displays 1
}
Why does myVar hold the value 1 even if I am not returning anything from the function?
setInterval returns a value, not your function. It returns an intervalID, so you can clear it with clearTimeout.
myVar holds the return value of the call to setInterval irrespective of the fact that you have declared an anonymous function.
myVar will take the return value of the call to setInterval, not of the anonymous function you're passing, neither from myTimer.
Here is how it works:
setInterval, which returns a timer id. You pass it a reference to an anonymous function.myTimer, which also returns undefined. That is never used inside your anonymous function.
