How to login into a website with CasperJS?

Question

You will need to use Casper fill() function.

Below is an example which login to Facebook and print out your name after login. Note that you need to put in your username and password:

var casper = require('casper').create({   
    verbose: true, 
    logLevel: 'debug',
    pageSettings: {
         loadImages:  false,         // The WebPage instance used by Casper will
         loadPlugins: false,         // use these settings
         userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4'
    }
});

// print out all the messages in the headless browser context
casper.on('remote.message', function(msg) {
    this.echo('remote message caught: ' + msg);
});

// print out all the messages in the headless browser context
casper.on("page.error", function(msg, trace) {
    this.echo("Page Error: " + msg, "ERROR");
});

var url = 'http://www.facebook.com/';

casper.start(url, function() {
   console.log("page loaded");
   this.test.assertExists('form#login_form', 'form is found');
   this.fill('form#login_form', { 
        email: '**<put your email here>**', 
        pass:  '**<put your password here>**'
    }, true);
});

casper.thenEvaluate(function(){
   console.log("Page Title " + document.title);
   console.log("Your name is " + document.querySelector('.headerTinymanName').textContent ); 
});

casper.run();

Here is a slightly changed version of the code from Ngo Hung. The selector for the username was off as was the assignment of the userAgent:

var casper = require('casper').create({   
    verbose: true, 
    logLevel: 'debug',
    userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22',
    pageSettings: {
      loadImages:  false,         // The WebPage instance used by Casper will
      loadPlugins: false         // use these settings
    }
});

// print out all the messages in the headless browser context
casper.on('remote.message', function(msg) {
    this.echo('remote message caught: ' + msg);
});

// print out all the messages in the headless browser context
casper.on("page.error", function(msg, trace) {
    this.echo("Page Error: " + msg, "ERROR");
});

var url = 'http://www.facebook.com/';

casper.start(url, function() {
    console.log("page loaded");
    this.test.assertExists('form#login_form', 'form is found');
    this.fill('form#login_form', { 
        email: '**<put your email here>**', 
        pass:  '**<put your password here>**'
    }, true);
});

casper.thenEvaluate(function(){
    console.log("Page Title " + document.title);
    console.log("Your name is " + document.querySelector(".fbxWelcomeBoxName").innerHTML);
});

casper.run();

UPDATE: I recommend anyone else to use a site of their own, or at least not facebook.com if they are planning large amounts of testing. Facebook could tell that I was trying to log in over and over started emailing me and making me confirm my account with SMS.