Yes. http://jsfiddle.net/SwFJg/6/
var DEBUG = (function(){
var timestamp = function(){};
timestamp.toString = function(){
return "[DEBUG " + (new Date).toLocaleTimeString() + "]";
};
return {
log: console.log.bind(console, '%s', timestamp)
}
})();
DEBUG.log("banana", {foo:'bar'}); //[DEBUG 2:43:21 PM] banana Object {foo: "bar"}
console.log("Peppercorn"); //Peppercorn
DEBUG.log("apple"); //[DEBUG 2:43:21 PM] apple
DEBUG.log("orange"); //[DEBUG 2:43:21 PM] orange
setTimeout(function(){
DEBUG.log("mango"); //[DEBUG 2:43:25 PM] mango
},3000)
This works because toString
is called on timestamp
(and, in fact, everything) each time console.log
is called.
We overwrite the default toString
method, and replace it with a time stamp (obviously you can change the output to whatever you want).
I chose the above pattern because, as others have noted (in SO chat), you can easily extend the DEBUG object to do other things.
...
return {
log: console.log.bind(console, '%s', timestamp),
error: console.error.bind(console, '%s', timestamp),
info: console.info.bind(console, '%s', timestamp),
warn: console.warn.bind(console, '%s', timestamp),
group: ...,
groupEnd: ...,
groupCollapsed: ... // etc
}
...