Sleep function in javascript/node.js

Question

I am trying to create a "sleep" function where I like to wait 10 seconds before continue with next command.

This doesn't work. No sleep is occuring. How can I put it nicely in a function like I do below "sleep(10000)" which is possible to call?

console.log("Hello");
sleep(10000);
console.log("World!");

function sleep(ms) {

    return new Promise(resolve => setTimeout(resolve, ms));
}

`Promise` is asynchronous. Where as you want something synchronous — Sushanth --, Mar 26 '19 at 17:37
you may use async/await for simulating sth like this but I would not recommend it. Natively a sleep function that blocks execution it is NOT supported — Nikos M., Mar 26 '19 at 17:38

score 7 · Accepted Answer · answered Mar 26 '19 at 17:38

7

use then, so as to execute code once the promise has been resolved.

console.log("Hello");
sleep(10000).then(() => {
    console.log("World!");
})


function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

answered Mar 26 '19 at 17:38

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Then I understand, thank you! – Andreas Mar 26 '19 at 17:43

Sleep function in javascript/node.js

1 Answers1