stdjson is a minimal nodejs module to log JSON to stdout and stderr.
npm install stdjson
varlog=require('stdjson');// initialize, logLevel is the only optionlog=log({logLevel : "info"});// default "debug"log.debug("this will be ignored");// no outputlog.info("just message");// stdout:// {"message":"just message","level":"info","timestamp":"2012-10-13T21:02:42.113Z"}log.info("message","data");// stdout:// {"message":"message","data":"data","level":"info","timestamp":"2012-10-13T20:32:08.625Z"}log.info("message",{my : "data object"});// stdout:// {"message":"message","data":{"my":"data object"},"level":"info","timestamp":"2012-10-13T21:03:48.764Z"}log.warn({just : "data"});// stdout:// {"data":{"just":"data"},"level":"warn","timestamp":"2012-10-13T21:01:01.817Z"}log.error(newError("oh no"));// stderr (includes stack trace):// {"message":"Error: oh no","data":"Error: oh no\n at repl:1:11\n at REPLServer.self.eval (repl.js:111:21)\n at rli.on.self.bufferedCmd (repl.js:260:20)\n at REPLServer.self.eval (repl.js:118:5)\n at Interface.<anonymous> (repl.js:250:12)\n at Interface.EventEmitter.emit (events.js:93:17)\n at Interface._onLine (readline.js:199:10)\n at Interface._line (readline.js:517:8)\n at Interface._ttyWrite (readline.js:735:14)\n at ReadStream.onkeypress (readline.js:98:10)","level":"error","timestamp":"2012-10-13T20:58:18.275Z"}// if you are really curiouslog.info("message",{});// stdout:// {"message":"message","data":{},"level":"info","timestamp":"2012-10-13T21:04:20.688Z"}log.info("message",null);// stdout:// {"message":"message","data":null,"level":"info","timestamp":"2012-10-13T21:04:30.806Z"}log.info("message",undefined);// stdout:// {"message":"message","level":"info","timestamp":"2012-10-13T21:04:41.371Z"}