Javascript with callback


Hi

I have a simple piece of example code, in which I am passing a function (for call back) into a class.
When this function is called back, I wish to have a parameter passed back but this is not working.

Thanks for you help
Phil
<?php
  
?>

<!DOCTYPE html>
<head>

<script language='javascript' type='text/javascript'>
window.onload=init;

function init() {
    var y;
    var myClassObj = new MyClass(5, calledBack); 
}

function calledBack(x) {
    alert("Got called back with "+x);
}

    
function MyClass(val, f)
{
    var data = val;
    
    function someFunc(x) 
    {
       alert("someFunc "+x);
       f.call(x);
    }
    
    someFunc(data);
}
</script>


</head>
<body>

<div style="" >

</div>

</body>
</html>

Open in new window

BeerFizzAsked:
Who is Participating?
 
jasonduanConnect With a Mentor Commented:
change your code line #28 from
f.call(x);
to
f(x);
0
 
BeerFizzAuthor Commented:
Perfect!  Thank you.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.