node api

console.js

// writes to stdout, same as info
console.log('hello %d', 2015);
//writes to stderr, same as warn
console.error('hello %d', 2015);

console.dir({
	name: 'John doe',
	address: {
    	city: 'NY',
    	state: 'DC'
	}
});

console.time('time-tick');
setTimeout(function(){
	console.timeEnd('time-tick');
}, 4000);

// produces stack trace at the point
var i = 0;
for (;i<4;i++) {
	console.trace('trace-message');
}

// throw assert message if first argument is true
console.assert(4 > 7, 'assert-message');
console.assert(4 < 7, 'assert-message');