sleep and settimeout diff

timeout diff with sleep func

function sleep(ms) {
	var dt = new Date();
	dt.setTime(dt.getTime() + ms);
	while (new Date().getTime() < dt.getTime());
}

// sleep(4000);
console.log('setTimeout begin');
setTimeout(

function() {
	sleep(6000);
	console.log('0 second delay timer executed...');
}, 0);
setTimeout(function() {
	sleep(0);
	console.log('4 seconds delay timer executed...');
}, 4000)
console.log('setTimeout end');


/*  http://www.digimantra.com/tutorials/sleep-or-wait-function-in-javascript/
The difference between the above function is that sleep will halt the script and will not allow the script to execute further lines of code. However when  setTimeout is called, it won’t halt the further execution of the script, instead it will execute after the specified interval of time and also the other functions (if any) will keep on executing.
*/