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script.aculo.us Appear Effect

  • Last Updated : 23 Nov, 2020

In this article, we will demonstrate the effect of Appear by using a JavaScript library called script.aculo.us. The appear effect offers a smooth appearing transition to the element. We can also adjust the duration of this effect as well.

Syntax:

Effect.Appear('element_id');

// or

Effect.Appear('element_id', [options]);

Options:

  • duration: Duration take to fade the element, defaults value is 1.0.
  • from: It is a float value representing the percent of opacity to start, the default value is 0.0.
  • to: It is a float value representing the percent of opacity to end, the default value is 1.0.

Note: To use this library, we are supposed to install the library and then use it in our programs. And to do so you can follow this link http://script.aculo.us/downloads.



Example 1: To demonstrate the use of this function, we have written a small piece of code. In which we have written a small JavaScript function named ShowEffect method which uses the Appear method of this library. By clicking on Click me to Appear the line! , you will see the effect clearly.

To see the effect, first install the library and then open this program in the local environment.

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script type="text/javascript" 
        src="prototype.js">
    </script>
      
    <script type="text/javascript" 
        src="scriptaculous.js?load = effects,controls">
    </script>
      
    <script type="text/javascript">
        function ShowEffect(element) {
            new Effect.Appear(element, 
            { duration: 1, from: 0, to: 1.0 });
        }
    </script>
</head>
  
<body>
    <div onclick="ShowEffect('geeks_1')">
        <button type="button">
            Click me to Appear the line!
        </button>
    </div>
    <br />
    <br />
  
    <div id="geeks_1">
        LINE TO APPEAR
    </div>
</body>
  
</html>

Output:

Example 2:

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script type="text/javascript" 
        src="prototype.js">
    </script>
      
    <script type="text/javascript" 
        src="scriptaculous.js?load = effects,controls">
    </script>
      
    <script type="text/javascript">
        function ShowEffect(element) {
            new Effect.Appear(element, 
            { duration: 1, from: 0, to: 1.0 });
        }
    </script>
</head>
  
<body>
    <div onclick="ShowEffect('geeks_1')">
        <button type="button">
            Click me to Appear the line!
        </button>
    </div>
    <br />
    <br />
  
    <div id="geeks_1">
        <div style="width: 10%; height: 10%; 
            background-color: green;">
            Geeks For Geeks
        </div>
    </div>
</body>
  
</html>

Output:




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