Question

I am looking for something like this

function someFunc() {

callAjaxfunc(); //may have multiple ajax calls in this function
someWait(); // some code which waits until async calls complete
console.log('Pass2');

}

function callAjaxfunc() {
  //All ajax calls called here
  console.log('Pass1');

}

What I have tried?

1
Jquery.when()

tried using it..it works fine. But not the way I want. $.when will wait but the code next to $.when() runs with out waiting. The code inside do callback only runs after ajax calls

2.
setTimeOut() with a global flag

I was so confident this will work. I tried like following.

GlobalFlag = false;

function someFunc()     
    callAjaxfunc(); //may have multiple ajax calls in this function
    setTimeOut(waitFunc, 100); // some  which waits until async calls complete
    console.log('Pass2');
}

function callAjaxfunc() {
    //All ajax calls called here
    onAjaxSuccess: function() {
        GlobalFlag = true;
    };
    console.log('Pass1');    
}

function waitFunc() {
    if (!GlobalFlag) {
        setTimeOut(waitFunc, 100);
    }
}​

Still not able to get wanted result. Am I doing something wrong here? This is not the way?

Result I wanted should come like this

Pass1
Pass2

Not able to make any fiddle as it needs AJAX calls

EDIT: As many were suggesting callbacks..i know about them..but still the code next to somewait() will get executed…I want browser to completely stop executing code next to somewait() until the ajax call..Also it may be a bad practice but worth to know and try if possible…

Answer 1

Use callbacks. Something like this should work based on your sample code.

function someFunc() {

callAjaxfunc(function() {
    console.log('Pass2');
});

}

function callAjaxfunc(callback) {
    //All ajax calls called here
    onAjaxSuccess: function() {
        callback();
    };
    console.log('Pass1');    
}

This will print Pass1 immediately (assuming ajax request takes atleast a few microseconds), then print Pass2 when the onAjaxSuccess is executed.