How to fire multiple JavaScript functions at once

Question

How do I fire these four functions at exactly the same time;

fireThisNow1();
fireThisNow2();
fireThisNow3();
fireThisNow4();

karaxuna · Accepted Answer · 2013-04-18 06:46:02Z

5

You mean asynchronously yes? Try this:

setTimeout(function(){
    fireThisNow1();
}, 0);

setTimeout(function(){
    fireThisNow2();
}, 0);

setTimeout(function(){
    fireThisNow3();
}, 0);

setTimeout(function(){
    fireThisNow4();
}, 0);

Same (if parent object is window):

for(var i = 1; i < 5; i++){
    setTimeout(function(){
        window['fireThisNow' + i]();
    }, 0);
}

answered Apr 18, 2013 at 6:46

karaxuna

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2 Comments

Strille Over a year ago

This will not fire the functions at exactly the same time, but one after each other.

Peter PitLock Over a year ago

So fireThisNow2 will fire after fireThisNow1 has started, and before fireThisNow1 has necessarily finished?

Philipp · Accepted Answer · 2013-04-18 06:48:13Z

3

When you want to execute multiple functions in parallel (multi-threading), you could use WebWorkers.

answered Apr 18, 2013 at 6:48

Philipp

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2 Comments

starbeamrainbowlabs Over a year ago

Link to web workers tutorial: html5rocks.com/en/tutorials/workers/basics

SomeShinyObject Over a year ago

caniuse.com/webworkers - Just a reminder that WebWorkers don't work in IE<10.

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