Asynchronous call in javascript

Question

I am executing a function and i want to pause execution for some time.

function a(){

}

//here some code --- I am using result of a function here...

Can anyone help me... how to use asynchronous call??

Tuan · Accepted Answer · 2012-04-03 07:06:47Z

4

Your function should accept a callback parameter that it would execute after doing its thing. So something like:

function a(callback) {
    // do something

    if (callback) {
        callback();
    }
}

Then you would call it like:

a(function () {
    alert("finished");
});

answered Apr 3, 2012 at 7:06

Tuan

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Comments

Anand Nandakumar · Accepted Answer · 2012-04-03 07:03:36Z

0

How about just using

setTimeout(function(){
  // do some work after the timeout pause
}, 1500);

It is waiting for 1500 milliseconds before executing the function contained.

answered Apr 3, 2012 at 7:03

Anand Nandakumar

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user447356 · Accepted Answer · 2012-04-03 07:06:38Z

Not sure what you mean - to use result of a function, assign it to a variable:

var r = a();

//....some code...

//using result of a function here

alert("result of a(): " + r);

In case of AJAX or something similar use the callback function provided to you, for example with jQuery:

$.post("myajaxpage", function() {
    //callback function - executed after request is finished
    var r = a();
    alert("result of a(): " + r);
});