alias to chrome console.log

Question

I would like to know why the follow code doesn't work in the Google Chrome:

// creates a xss console log  var cl = ( typeof( console ) != 'undefined' ) ? console.log : alert; cl('teste'); 

output: Uncaught TypeError: Illegal invocation

thanks.

Answer 1

https://groups.google.com/a/chromium.org/d/msg/chromium-bugs/gGVPJ1T-qA0/F8uSupbO2R8J

Apparently you can also defined log:

 log = console.log.bind(console); 

and then the line numbers also work

Answer 2

When you write cl();, you're calling log in the global context.

Chrome's console.log doesn't want to be called on the window object.

Instead, you can write

cl = function() { return console.log.apply(console, arguments); }; 

This will call log in the context of console.