PhantomJS - onAlert()

This callback is called when there is an alert on the page. The callback takes a string and does not return anything.

Syntax

Its syntax is as follows −

var wpage = require('webpage').create(); 
wpage.onAlert = function(msg) {};

Example

The following example shows the use of onAlert() method.

var wpage = require('webpage').create(); 
wpage.onAlert = function(str) { 
   console.log(str); 
} 
wpage.open('http://localhost/tasks/alert.html', function(status) { 
   //wpage.stop(); 
   console.log(status);  
   
   phantom.exit(); 
});

alert.html

<html> 
   <head></head> 
   <body> 
      <script type = "text/javascript"> 
         alert("Welcome to phantomjs"); 
      </script> 
      <h1>This is a test page</h1> 
   </body> 
</html>

The above program generates the following output.

Welcome to phantomjs 
Success

phantomjs_webpage_module_events_callbacks.htm