Javascript How do I wait x seconds before running next line of code?

Question

I would like to be able to make something similar to this:

function testFunction() {
    alert("Test");
}

if (x > y) {
    wait(z);
    testFunction();
}

Thanks!

Have you tried placing the part of source code into a setTimeout? `setTimeout(function(){ //this will run after 3 seconds}, 3000);` If you could be more clear with your question and say which section you want to wait or why it might be easier for someone to give you a solid answer. — NewToJS, Oct 25 '17 at 21:23
@NewToJS is right! Also you can take a look to this similar question https://stackoverflow.com/questions/14226803/wait-5-seconds-before-executing-next-line?rq=1 — lmoglia, Mar 31 '21 at 19:55

score 10 · Answer 1 · answered Oct 25 '17 at 21:25

10

Can now nicely be done with promises:

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

async function demo() {
  console.log('Taking a break...');
  await sleep(2000);
  console.log('Two second later');
}

demo();

answered Oct 25 '17 at 21:25

IAmCoder

3,179
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Its important to note this requires support for es6. – Shawn J. Molloy Jul 05 '18 at 18:34

Shawn J. Molloy · Answer 2 · 2017-10-25T21:34:20.153

6

Please try using the setTimeout function:

setTimeout(function(){ alert("Hello"); }, 3000);

From this link:

https://www.w3schools.com/jsref/met_win_settimeout.asp

So for your specific use case:

var timeToWait = 3000; // in miliseconds.
function testFunction() {
    alert("Test");
 }

 if (x > y) {
      setTimeout(function(){ testFunction(); }, timeToWait);
  }

Hope that helps.

edited Oct 25 '17 at 21:34

answered Oct 25 '17 at 21:23

Shawn J. Molloy

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5
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score 0 · Answer 3 · answered Oct 25 '17 at 21:23

You have to put your code in the callback function you supply to setTimeout:

function stateChange(newState) {
    setTimeout(function () {
        if (newState == -1) {
            alert('VIDEO HAS STOPPED');
        }
    }, 5000);
}

From this question: Javascript - Wait 5 seconds before executing next line

Javascript How do I wait x seconds before running next line of code?

3 Answers3