Prototype - positionedOffset() Method

This method returns element.s offset relative to its closest positioned ancestor. This calculates the cumulative offsetLeft and offsetTop of an element and all its parents until it reaches an element with a position of static.

NOTE − Note that all values are returned as numbers only although they are expressed in pixels.

Syntax

element.positionedOffset();

Return Value

Returns element.s offset relative to its closest positioned ancestor.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            var arr = $('container2').positionedOffset();
            alert("offsetLeft : " + arr[0] );
            alert("offsetTop : " + arr[1] );
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />
      
      <div id = "container1">
         <div id = "element" 
            style = "position:absolute; top: 30px; left: 20px; 
            border:1px solid red;">
            This is the first Element Box
         </div>
      </div>

      <div id = "container2">
         <div id = "element" 
            style = "top: 30px; left: 20px; 
            border:1px solid red;">
            This is the second Element Box
         </div>
      </div>
      <br />
      
      <input type = "button" value = "Click" onclick = "showResult();"/>
   </body>
</html>

Output

prototype_element_object.htm
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