How to click brower prompt in casperjs - phantomjs

Question

I am creating a automated script to do a testing. So when my script try to log out by clicking "log out" it prompt confirmation window where the script has to select 'ok'
Source page looks likes:
<script type="text/javascript">
function logOut() {
if (confirm("Are you sure you want to log out of the system?\nClick OK for Yes or CANCEL for No"))
location.href='ppp_logout.cfm'
}</scrip
My code to click log out and filter the confirm box.
casper.clickLabel('Log Out', 'a');
casper.echo('------$$$ Log Off button clicked', 'INFO');
casper.setFilter('page.confirm', function(msg){
return msg === "Are you sure you want to log out of the system?\nClick OK for Yes or CANCEL for No" ? false : true;
});
reference: http://docs.casperjs.org/en/1.1-beta2/events-filters.html
Allows to react on a javascript confirm() call:
casper.setFilter("page.confirm", function(msg) {
return msg === "Do you like vbscript?" ? false : true;
});
what I am doing wrong

Answer 1

Your ternary operation is backwards.
You can change the following line:
return msg === '...' ? false : true;
... to:
return msg === '...' ? true : false;
... but since the ternary operation is not needed, you can simply write:
return msg === '...';
Full Example:
Consider the following HTML container:
<div id="result"></div>
Now, contemplate the following JavaScript code on the same page:
var result = document.getElementById('result');
if (confirm('Are you sure?')) {
result.textContent = 'Success!';
}
You can use the following CasperJS code to obtain the result:
var casper = require('casper').create();
casper.setFilter('page.confirm', function (message) {
return message === 'Are you sure?';
});
casper.start('https://example.com/', function () {
this.echo(this.getElementInfo('#result').text); // Result: 'Success!'
});
casper.run();