.fadeIn( [ duration ], [ callback ] )
Returns: jQuery
Description: Display the matched elements by fading them to opaque.
.fadeIn( [ duration ], [ callback ] )
version added: 1.0
A string or number determining how long the animation will run.
callback
A function to call once the animation is complete.
.fadeIn( [ duration ], [ easing ], [ callback ] )
version added: 1.4.3
A string or number determining how long the animation will run.
easing
A string indicating which easing function to use for the transition.
callback
A function to call once the animation is complete.
The .fadeIn() method animates the opacity of the matched elements.
Durations are given in milliseconds; higher values indicate slower animations, not faster ones. The strings 'fast' and 'slow' can be supplied to indicate durations of 200 and 600 milliseconds, respectively. If any other string is supplied, or if the duration parameter is omitted, the default duration of 400 milliseconds is used.
If supplied, the callback is fired once the animation is complete. This can be useful for stringing different animations together in sequence. The callback is not sent any arguments, but this is set to the DOM element being animated. If multiple elements are animated, it is important to note that the callback is executed once per matched element, not once for the animation as a whole.
We can animate any element, such as a simple image:
<div id="clickme">
Click here
</div>
<img id="book" src="book.png" alt="" width="100" height="123" />
With the element initially hidden, we can show it slowly:
$('#clickme').click(function() {
$('#book').fadeIn('slow', function() {
// Animation complete
});
});
Additional Notes:
- All jQuery effects, including
.fadeIn(), can be turned off globally by settingjQuery.fx.off = true. For more information, see jQuery.fx.off.
Examples
Example 1
Animates hidden divs to fade in one by one, completing each animation within 600 milliseconds.
$(document.body).click(function () {
$("div:hidden:first").fadeIn("slow");
});
Example 1 - Full source:
<!DOCTYPE html> <html> <head> <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript" language="javascript"> $(document).ready(function(){ $(document.body).click(function () { $("div:hidden:first").fadeIn("slow"); }); }); </script> <style> span { color:red; cursor:pointer; } div { margin:3px; width:80px; display:none; height:80px; float:left; } div#one { background:#f00; } div#two { background:#0f0; } div#three { background:#00f; } </style> </head> <body> <span>Click here...</span> <div id="one"></div> <div id="two"></div> <div id="three"></div> </body> </html>
Example 2
Fades a red block in over the text. Once the animation is done, it quickly fades in more text on top.
$("a").click(function () {
$("div").fadeIn(3000, function () {
$("span").fadeIn(2000);
});
return false;
});
Example 2 - Full source:
<!DOCTYPE html> <html> <head> <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript" language="javascript"> $(document).ready(function(){ $("a").click(function () { $("div").fadeIn(3000, function () { $("span").fadeIn(2000); }); return false; }); }); </script> <style> p { position:relative; width:400px; height:90px; } div { position:absolute; width:400px; height:65px; font-size:36px; text-align:center; color:black; background:red; padding-top:25px; font-weight:bold; top:0; left:0; display:none; } </style> </head> <body> <p> Let it be known that the party of the first part and the party of the second part are henceforth and hereto directed to assess the allegations for factual correctness... (<a href="#">click!</a>) <div><span>CENSORED!</span></div> </p> </body> </html>
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