JS: Thread.sleep function | JavaScript

Thread.sleep function

How to sleep the thread as Thread.Sleep do in C#, Java etc. This article has the code example of sleeping the thread, through function that takes input miliseconds are arguments.

There is no built-in function that could be the equivalent of Thread.Sleep in Java, C# and other programming languages. We can achieve this with the following code snipet.


function sleep(ms){
	if(ms <= 0)
		return;
	var c = Date.now();
	var to = c + ms;// TimeOut;
	while(true){
		if(Date.now() > to){
			return; //terminates the while loop and returned
		}
	}
}

The function sleep passes sleep-duration as miliseconds ms.
First we have taken the current time in c.
Add current time c with sleep-duration ms to get timeout.
Start while loop for inifinte time
The if condition to check on each iteration until the current time is less than timout to.

sleep function usage:


console.log(new Date());
sleep(3000);
console.log(new Date());

Sun Mar 27 2022 15:13:01 Sun Mar 27 2022 15:13:04

First print the current date time on the console using new Date(), then sleep the thread for 3 seconds (3000 miliseconds), then print the current date time again. We spot the difference of 3 seconds between both printings.

JS: Thread.sleep function | JavaScript

Thread.sleep function

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