I have a problem where I want to fade out an image, then move the image to an empty <li> container. However, the image doesn't fade, instead it just seems like the fade is being overridden by the move, using html().

Below is what I'm trying to do. Is there a way I can force the move to wait for the fade to plete?

// Fade out image to be replaced
mosaic_box.find('img').fadeTo(7000, 0.0)

// Then move the image
$('.mosaic_list li:empty', obj)
    .random(1)
    .html(mosaic_box.find('img')
        .addClass('mosaic_last_img')
    );

I have a problem where I want to fade out an image, then move the image to an empty <li> container. However, the image doesn't fade, instead it just seems like the fade is being overridden by the move, using html().

Below is what I'm trying to do. Is there a way I can force the move to wait for the fade to plete?

// Fade out image to be replaced
mosaic_box.find('img').fadeTo(7000, 0.0)

// Then move the image
$('.mosaic_list li:empty', obj)
    .random(1)
    .html(mosaic_box.find('img')
        .addClass('mosaic_last_img')
    );

• javascript
• jquery
• timeout
• fade

4 Answers 4

Do the move in the callback from the fadeTo function:

mosaic_box.find('img').fadeTo(7000, 0.0, function() { 
    $('.mosaic_list li:empty', obj)
     .random(1)
     .html(mosaic_box.find('img').addClass('mosaic_last_img'));
});

Move your code into a function and pass that function to the callback param of fadeTo

function callback(){
                    // Then move the image
                    $('.mosaic_list li:empty', obj)
                    .random(1)
                    .html(mosaic_box.find('img')
                        .addClass('mosaic_last_img')
                        );
}

 // Fade out image to be replaced
 mosaic_box.find('img').fadeTo(7000, 0.0, callback)

fadeTo(), as with most animation related methods, accept an optional callback argument which you can use to specify the function to run once the animation is pleted.

To modify your code (untested):

// Fade out image to be replaced
mosaic_box.find('img').fadeTo(7000, 0.0, function() {
    // Then move the image
    $('.mosaic_list li:empty', obj)
        .random(1)
        .html(mosaic_box.find('img')
            .addClass('mosaic_last_img')
        );
});

jQuery.fadeTo() has an optional callBack parameter.

http://api.jquery./fadeTo/

.fadeTo( duration, opacity [, callback] )

callback - A function to call once the animation is plete.

The simplest way to do this is using an anonymous function -

mosaic_box.find('img').fadeTo(7000, 0.0, function(){
    $('.mosaic_list li:empty', obj)
        .random(1)
        .html(mosaic_box.find('img')
        .addClass('mosaic_last_img');
    );
});