48

I want to fade out an element and all its child elements after a delay of a few seconds. but I haven't found a way to specify that an effect should start after a specified time delay.

Matthew Murdoch
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Dónal
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6 Answers6

77
setTimeout(function() { $('#foo').fadeOut(); }, 5000);

The 5000 is five seconds in milliseconds.

Jason Bunting
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swilliams
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43

I use this pause plugin I just wrote

$.fn.pause = function(duration) {
    $(this).animate({ dummy: 1 }, duration);
    return this;
};

Call it like this :

$("#mainImage").pause(5000).fadeOut();

Note: you don't need a callback.


Edit: You should now use the jQuery 1.4. built in delay() method. I haven't checked but I assume its more 'clever' than my plugin.

iota
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Simon_Weaver
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  • This helps me so much! Thank you :-) – Jesse Jun 04 '09 at 13:22
  • just watch out if jQuery ever adds a pause() function because there's will probably be better than mine! but its good to abstract away what youre doing like this – Simon_Weaver Jun 05 '09 at 03:10
  • can someone explain WHY i dont need a callback? i'm not quite sure why this doesnt return immediately – Simon_Weaver Sep 11 '09 at 23:52
  • jQuery has a built in animation queue... if you never reset/stop the queue, the "pause" acts as period of animation that doesn't actually animate anything. – gnarf Jan 10 '10 at 00:27
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    stop() doesn't work with delay(), so I still use your dummy animation hack. (bug http://bugs.jquery.com/ticket/6576 ) – yonran Jan 22 '11 at 20:26
19

Previously you would do something like this

$('#foo').animate({opacity: 1},1000).fadeOut('slow');

The first animate isn't doing anything since you already have opacity 1 on the element, but it would pause for the amount of time.

In jQuery 1.4, they have built this into the framework so you don't have to use the hack like above.

$('#foo').delay(1000).fadeOut('slow');

The functionality is the same as the original jQuery.delay() plugin http://www.evanbot.com/article/jquery-delay-plugin/4

Yi Jiang
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Drew
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11

The best way is by using the jQuery delay method:

$('#my_id').delay(2000).fadeOut(2000);

1

I've written a plugin to let you add a delay into the chain.

for example $('#div').fadeOut().delay(5000).fadeIn(); // fade element out, wait 5 seconds, fade element back in.

It doesn't use any animation hacks or excessive callback chaining, just simple clean short code.

http://blindsignals.com/index.php/2009/07/jquery-delay/

1

You can avoid using setTimeout by using the fadeTo() method, and setting a 5 second delay on that.

$("#hideAfterFiveSeconds").click(function(){
  $(this).fadeTo(5000,1,function(){
    $(this).fadeOut("slow");
  });
});
Sampson
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  • doing this kind of block is very cpu intensive compared to setTimeout. I don't see the advantage. - Why is avoiding the native timer necessary? – redsquare Jan 18 '09 at 01:23