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jQuery Effect - fadeTo() 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 title</title>
   <script type="text/javascript" 
   src="/jquery/jquery-1.3.2.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>

To understand it in better way you can Try it yourself.



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