javascript - Is it possible to bind a date/time to a console log? -

i have following code:

var mylog = console.log.bind(console, '[debug]'); 

which works find when want log things prepended [debug] console. want add date/time log , tried this:

var mylog = console.log.bind(console, '[debug ' + (new date) + ']'); 

which not work because always logs same time (the time .bind called).

is there way (using .bind) log current time on each log without having this:

var mylog = function(){     var args = ['[debug ' + (new date) + ']'];     for(var = 0; < arguments.length; ++i) {         args.push(arguments[i]);     }     return console.log.apply(console, args); }; 

?

because above method shows me line console.log.apply called , not line mylog called.

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 called on timestamp (and, in fact, everything) each time console.log called.

we overwrite default tostring method, , replace time stamp (obviously can change output whatever want).

i chose above pattern because, others have noted (in chat), can extend debug object 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 } ...