Description: Display the matched elements by fading them to opaque.
durationA string or number determining how long the animation will run.
callbackA 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 }); });
<!DOCTYPE html>
<html>
<head>
<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>
<script src="https://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<span>Click here...</span>
<div id="one"></div>
<div id="two"></div>
<div id="three"></div>
<script>
$(document.body).click(function () {
$("div:hidden:first").fadeIn("slow");
});
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<style>
p { position:relative; width:400px; height:90px; }
div { position:absolute; width:400px; height:65px;
font-size:36px; text-align:center;
color:yellow; background:red;
padding-top:25px;
top:0; left:0; display:none; }
span { display:none; }
</style>
<script src="https://code.jquery.com/jquery-latest.js"></script>
</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>
<script>
$("a").click(function () {
$("div").fadeIn(3000, function () {
$("span").fadeIn(100);
});
return false;
});
</script>
</body>
</html>