chillogger

chillogger

A logger Util that:

• Is colorful
• Can trace where in the code log was written
• Extendable transport
• Extendable levels dictionary

Getting Started

npm install -s chillogger

//import chillogger
const Chillogger = require("chillogger");
//create an instance
const logger = new Chillogger()
 
//Usage option 1: using logger.log:
// logger.log("level", message, ...metaObjects)
logger.log("info", "i am a log message",{"key":value},"string", function);
 
//Usage option 2: using logger.[level name]:
// logger.info(message, ...metaObjects)
log.debug("info");
 
//Usage option 3, only for Error: using logger.error(error):
// will log error only if it is an object that has "message" on its.
log.error(new Error("this is an error"));

API

chilloger is configurable on 2 levels:

• instance: Set the config on the chilloger instance
• global: Set the defaults for any instance constructed from now on

Instance is created with:

new Logger([name][,options])

• name {string|Boolen} add logger name; in the build in node-console transport this will be included in any line logged using the instance if true is passed, chillogger will generate an id for you
• options {Object}
  • transport: {function[]} an array of functions that handles new log message, called by the instance with f(logMessage, loggerInstance) Default: built in node-console transport
  • levels: {Object} An object mapping log labels (for example "trace") to level (4) Default: see baseLevels.
  • level: {number} Max level to log Default: 3
  • trace: {boolean} Shows error stack trace, and enables time, and timeEnd, and chillogger's ability to trace log to file/line, Default: false.
  • verbosity: {number} built in console trasnport verbosity use 0, 1, or 1 Default: 0
• Returns: loggerInstance

Some of these options are also configurable globally:

// set default trace
process.env.trace = 0
// or
Logger.setGlobalTrace(0)
 
// set default level
process.env.level = 4
  // or
Logger.setGlobalLevel(4)
 
// set defaul verbosity
process.env.verbosity = 2
  //or
Logger.setGlobalVerbosity(2)

chillogger instance

• public methods
  • setLevel(level)
  • setTrace(trace)
  • setVerbosity(verbosity)
  • log(level, messageString, ...meta)
  • error(error)
  • time(label): time tracker that tells you where (file and line) timer started
  • timeEnd(label)

Also, all names of levels passed to the instance constructor as options, plus the build in levels are exposed using

log.bind(logger, levelName);

so if you have a level named "tellMommy" you can go

logger.tellMommy("everything",{mother: {knows: CONSTS.BEST}})`

Keep in mind that if your level name is reserved for chilloggers methods, it will not replace it.

baseLevels

The default levels map

 {
    fatal: 0,
    alert: 0,
    error: 1,
    warn: 2,
    info: 3,
    debug: 4,
    todo: 4,
    deprecated: 4,
    time: 5,
    trace: 5
  }

log message object

    {
      name, // logger instance name
      message, //string message
      meta, //an array of metadata objects;
      level, //log level
      levelLabel, //log level label
      ts: Date.now(), 
      src: { //src will be included only in case the instance is running with trace===true
        file, //file name
        line //line in code that called chillogger
      }
    }
  }