If you are looking to block the execution of code with call tosleep, then no, there is no method for that inJavaScript.

JavaScript does havesetTimeout method.setTimeout will let youdefer execution of a function for x milliseconds.

setTimeout(myFunction, 3000);// if you have defined a function named myFunction // it will run after 3 seconds (3000 milliseconds)

Remember, this is completely different from howsleep method, if it existed, would behave.

function test1(){        // let's say JavaScript did have a sleep function..    // sleep for 3 seconds    sleep(3000);    alert('hi'); }

If you run the above function, you will have to wait for 3 seconds (sleep method call is blocking) before you see the alert 'hi'. Unfortunately, there is nosleep function like that inJavaScript.

function test2(){    // defer the execution of anonymous function for     // 3 seconds and go to next line of code.    setTimeout(function(){         alert('hello');    }, 3000);      alert('hi');}

If you run test2, you will see 'hi' right away (setTimeout is non blocking) and after 3 seconds you will see the alert 'hello'.

A naive, CPU-intensive method to block execution for a number of milliseconds:

/*** Delay for a number of milliseconds*/function sleep(delay) {    var start = new Date().getTime();    while (new Date().getTime() < start + delay);}

You can use thesetTimeout orsetInterval functions.

function sleep(delay) {    var start = new Date().getTime();    while (new Date().getTime() < start + delay);}

This code blocks for the specified duration. This is CPU hogging code. This is different from a thread blocking itself and releasing CPU cycles to be utilized by another thread. No such thing is going on here. Do not use this code, it's a very bad idea.

• javascript