Prototype - Object extend() Method

This method copies all properties from the source to the destination object. This is used by Prototype to simulate inheritance by copying to prototypes.

Syntax

Object.extend(dest, src);

Return Value

Returns an altered object.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            var o1 = { name: 'Prototype', version: 1.5 };
            // An empty object
            var o2 = {};
            var o2 = Object.extend(o2, o1);

            alert( " Value of o2.name :" + o2.name );
            // Returns Prototype

            alert( " Value of o2.version :" + o2.version );
            // Returns 1.5
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />
      <br />
      <input type = "button" value = "Result" onclick = "showResult();"/>
   </body>
</html>

Output

prototype_basic_object.htm