Prevent a webpage from navigating away using JavaScript - Javascript jQuery Method and Property

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Description

Prevent a webpage from navigating away using JavaScript

Demo Code

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<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://code.jquery.com/jquery-1.11.0.js"></script> 
      <script type="text/javascript">
    $(window).load(function(){/*from   w  w w  . j a v  a2  s.  c  o  m*/
    $(window).on("beforeunload", function () {
        return "Please don't leave me!";
    });
    });

      </script> 
   </head> 
   <body>  
   </body>
</html>

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