jQuery fadeIn()

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jQuery facilitates with fading effect to fade an element in and out of visibility.

There are various fading methods available in jQuery. These are:

  • fadeIn()
  • fadeOut()
  • fadeToggle()
  • fadeTo()

fadeIn() method is used to fade in the hidden elements.

Example:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("#div1").fadeIn();
});
});
</script>
</head>
<body>
<p>Knock Knock. Click to let me In.</p>
<button>FadeIn</button><br><br>
<div id="div1" style="width:90px;height:45px;display:none;background-color:magenta;"></div><br>
</body>
</html>

Parameters like speed and callback can also be used in the fadeIn() method.

Syntax:

$(selector).fadeIn(speed, callback);

Speed:

  • Speed is an optional parameter that specifies the speed of the delay in reappearing the selected elements.
  • It can accept string values: “slow”, “fast”, or in milliseconds.
  • The default speed is 400 milliseconds.
  • On using “slow” keyword as the value for the speed parameter, the compiler takes it as 600 milliseconds.
  • Similarly, on using “fast” keyword as the value for the speed parameter, the compiler takes it as 200 milliseconds.

Callback:

  • Callback is also an optional parameter.
  • Callback is the function to be executed once the fadeIn() method’s execution is complete.

Example:

<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("#div1").fadeIn();
$("#div2").fadeIn(3000);
$("#div3").fadeIn(6000);
});
});
</script>
</head>
<body>
<p>Knock Knock. Click to let us In.</p>
<button>FadeIn</button><br><br>
<div id="div1" style="width:80px;height:80px;display:none;background-color:red;border-radius: 70px"></div><br>
<div id="div2" style="width:80px;height:80px;display:none;background-color:green;border-radius: 70px"></div><br>
<div id="div3" style="width:80px;height:80px;display:none;background-color:blue;border-radius: 70px"></div>
</body>
</html>