Tutorials Point


  Learn Prototype
  Prototype Resources
  Selected Reading

Copyright © 2014 by tutorialspoint



  Home     References     Discussion Forums     About TP  

Prototype previous() Method


previous next AddThis Social Bookmark Button


Advertisements

This method returns element's previous sibling or the index'th one, if index is specified that matches cssRule. If no cssRule is provided, all previous siblings are considered. If no previous sibling matches these criteria, undefined is returned.

Syntax:

element.previous([cssRule][, index = 0] );

Return Value:

  • Returns HTML element. If no previous sibling matches these criteria, undefined is returned.

Example:

<html>
<head>
<title>Prototype examples</title>

<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){
   var str = $('saying').previous();
   alert( "$('saying').previous() " + str.innerHTML );
   
   var str = $('saying').previous(0);
   alert( "$('saying').previous(0) " + str.innerHTML  );
   
   var str = $('saying').previous('h3');
   alert( "$('$('saying').previous('h3') " + str.innerHTML  );

   var str = $('ida-red').previous( '.yummy');
   alert( "$('ida-red').previous( .yummy ) " + str.innerHTML );

   var str = $('ida-red').previous( 5 );
   alert( "$('ida-red').previous() " + str );
}

</script>
</head>

<body>

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

  <ul id="fruits">

  <li id="apples">
    <h3 id="title">Apples</h3>
    <ul id="list-of-apples">
      <li id="golden-delicious">Golden Delicious</li>
      <li id="mutsu">Mutsu</li>
      <li id="mcintosh" class="yummy">McIntosh</li>
      <li id="ida-red" class="yummy">Ida Red</li>
    </ul>
    <p id="saying">An apple a day keeps the doctor away.</p>  
  </li>

  </ul>

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

</body>
</html>

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



previous next Printer Friendly

Advertisements


  

Advertisements