I have a problem with jquery callback. The callback is executed before the fadeIn animation is completed. What im trying to do is, I want to replace an existing image with a new image and resize the new image to a specific size.

var filepath = "images/test.jpg";
$('#imagewrap').css('background-image', 'url("images/loader.gif")');//display a loading gif
$('#uimage').hide();//hide the current image
var i = $('<img />').attr('src', filepath).load(function()//load the new image 
    $('#uimage').attr('src', i.attr('src'));//change the src to new image
    $('#imagewrap').css('background-image', 'none');//hide the loading gif
    $('#uimage').fadeIn('slow', resize());//fade in the new image

function resize()
alert($('#uimage').width());//it shows the width of the previous image

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Have you tried this:

$('#uimage').fadeIn('slow', function(){ resize(); });

Are you sure there is no CSS for that id specifying a fixed width?

your code fixed it. thanks. whats wrong in calling the function directly?

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You would want the following:

$('#uimage').fadeIn('slow', resize);

Adding the () at the end executes the function. So instead of fadeIn executing the function when it is done doing it's thing, you have it executing and returning undefined as the function to get executed (as resize returns undefined).

commented: Good point. Missed that. +14

thanks for the explanation

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