jQuery - fadeIn( speed, [callback] ) Method

Description

The fadeIn( ) method fades in all matched elements by adjusting their opacity and firing an optional callback after completion.

Syntax

Here is the simple syntax to use this method −

selector.fadeIn( speed, [callback] );

Parameters

Here is the description of all the parameters used by this method −

speed − A string representing one of the three predefined speeds ("slow", "def", or "fast") or the number of milliseconds to run the animation (e.g. 1000).
callback − This is optional parameter representing a function to call once the animation is complete.

Example

Following is a simple example a simple showing the usage of this method −

Live Demo

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://www.tutorialspoint.com/jquery/jquery-3.6.0.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
   
         $(document).ready(function() {

            $("#in").click(function(){
               $(".target").fadeIn( 'slow', function(){ 
                  $(".log").text('Fade In Transition Complete');
               });
            });

            $("#out").click(function(){
               $(".target").fadeOut( 'slow', function(){ 
                  $(".log").text('Fade Out Transition Complete');
               });
            });
				
         });
      </script>
		
      <style>
         p {background-color:#bca; width:200px; border:1px solid green;}
      </style>	
   </head>
	
   <body>
      <p>Click on any of the buttons</p>
		
      <button id = "out"> Fade Out </button>
      <button id = "in"> Fade In</button> 
		
      <div class = "target">
         <img src = "../images/jquery.jpg" alt = "jQuery" />
      </div>
		
      <div class = "log"></div>
   </body>
</html>

This will produce following result −

jquery-effects.htm