Tutorials Point


  Learn Prototype
  Prototype Resources
  Selected Reading

Copyright © 2014 by tutorialspoint



  Home     References     Discussion Forums     About TP  

Prototype empty() Method


previous next AddThis Social Bookmark Button


Advertisements

This method tests whether element is empty (i.e. contains only whitespace).

Syntax:

element.empty;

Return Value:

  • If it finds that element is an empty one then it returns true otherwise false

Example:

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){
   if($('wallet').empty() ){
       alert( "Wallet is empty " );
   }
   if($('cart').empty() ){
       alert( "Cart is full" );
   }
}
</script>
</head>

<body>

   <p>Click the button to see the result.</p>

   <div id="wallet">     </div>
   <div id="cart">full!</div>

   <br />
   <input type="button" value="showResult" 
             onclick="showResult();"/>

</body>
</html>

In this example:

$('wallet').empty();
// -> true
$('cart').empty();
// -> false

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



previous next Printer Friendly

Advertisements


  

Advertisements