Welcome to Firebug Console
console.log('Welcome to Firebug Console');
What is interesting is that you can even use variable inside the log method similar to printf method
var time = new Date();
// Print out : Today is Sun May 21 2006 ...
console.log('Today is %s.', time)
There is more colorful debug message that you can use and give you something like :
console.debug('This is just debugging text!');
console.info('This is some information.');
console.warn('This is a warning.');
console.error('This is an error!');
If you want to check the performance of a process you can use the Firebug timer, and this will be useful to have an idea about the execution time and help detecting resources consuming issues more easily.
var time = new Date()
console.log('Today is %s.', time);
Assertion are also available in the new API for example
For more information refer the links below…