jQuery Effect - fadeTo( speed, opacity, callback ) Method


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Description

The fadeTo( ) method fades the opacity of all matched elements to a specified opacity and firing an optional callback after completion.

Syntax

Here is the simple syntax to use this method −

selector.fadeTo(speed, opacity[, 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).

  • opacity − A number between 0 and 1 denoting the target opacity.

  • 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 −

<html>
   <head>
      <title>The jQuery Example</title>
      <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
		
      <script type="text/javascript" language="javascript">
   
         $(document).ready(function() {

            $("#more").click(function(){
               $(".target").fadeTo( 'slow', 0.7, function(){ 
                  $(".log").text('More Opacity Transition Complete');
               });
            });

            $("#less").click(function(){
               $(".target").fadeTo( 'slow', 0.2, function(){ 
                  $(".log").text('less Opacity 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="less"> Less Opacity </button>
      <button id="more"> More Opacity</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