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Prototype descendants() Method


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This method collects all of element's descendants and returns them as an array of extended elements.

Note that all of Prototype's DOM traversal methods ignore text nodes and return element nodes only.

Syntax:

element.descendants() ;

Return Value:

  • An array of HTML elements.

Example:

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


function showElements(){
   var arr = $('father').descendants();
   arr.each(function(node){
      alert(node.nodeName + ': ' + node.innerHTML);
   });
}

</script>
</head>

<body>

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

   <div id="father">
      <p id="kid">This is first paragraph</p>
   </div>

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

</body>
</html>

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



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