Simple & configurable logger

Usage:

var log = require('js-log')();

log.info("Hi everyone!");

log is a winston-based logger with usual methods.

By default it prints all messages except log.debug() and prepends them with module filename and directory.

Logging methods:

• log.debug(...)
• log.info(...)
• log.error(...)

The signature is like console.log.

Additionally:

• log.debugOn() -- enable debug for this very logger

Options:

var log = require('js-log')({
  module: <module object to log for>, by default - the requiring module,
  getShowPath: <function which returns label for module>
  getLogLevel: <function which returns log level (error/info/debug) for module>,
  getTransports: <function which returns transports for (logLevel, label)>
});

All options are optional.

DEBUG

There're two ways to enable debugging.

1. Call log.debugOn() in the code
2. Use DEBUG environment variable

Turn on all debugging:

DEBUG=* node app

DEBUG can be either '*' or a file mask to debug, in the same format as https://github.com/visionmedia/debug.

Examples:

// all files from the models/* folder (from project root)
DEBUG=models/* node app

// all files from models/* and lib/*
DEBUG=models/*,lib/* node app

// all files from models/* except models/user
DEBUG=-models/user,models/* node app

It's quite important that DEBUG is also used on many frameworks.

DEBUG=* will enable all debug for both your loggers and internal debugging of frameworks.

Sometimes it really helps.