Question

The following code using casper.js doesn’t output This is thenEvaluate string because Twitter.com disabled console.log (empty function):

var casper = require('casper').create({
    verbose: false,
    logLevel: 'debug'
});

casper.start("http://twitter.com");

casper.on('remote.message', function(msg) {
    this.echo('remote message caught: ' + msg);
})

casper.thenEvaluate(function() {
    console.log('This is thenEvaluate');
});

casper.run();

If I swapped the url to google.com or any other website, it works. My question is:

1. For website disabled console.log, is there a way to re-enable it?

2. If NO for #1, is there a way to do any kind of log at all within evaluate() or thenEvaluate() function?

Thanks.

Answer 1

I found the answer here about Restoring console.log()

var i = document.createElement('iframe');
i.style.display = 'none';
document.body.appendChild(i);
window.console = i.contentWindow.console;