@nexcella/logger v1.0.0

Logger

Simple and minimalistic library for logging.

Installation

npm

npm i @nexcella/logger

yarn

yarn add @nexcella/logger

Usage

// Create logger instance
const logger = new Logger(config: LoggerConfig)

// Logging messages with different types
logger.debug('Simple debug');
logger.info('Simple info');
logger.warn('Simple warn');
logger.error('Error with context', error);

// Get list of stored logs
logger.getLogs();
/*  ->> output - array of log strings
[
    "[1583397656725] DEBUG: Simple debug",
    "[2146437.1550000506] INFO: Simple info",
    "[2146437.159999972] WARN: Simple warn",
    "[2146437.159999972] ERROR: Error with context, {message: "Error message"}",
]*/

Methods:

This library supports the following logging methods:

• debug
• info
• warn
• error

All this methods have the following signature

logger.debug(message: string, ...context: any);

An unlimited number of contexts can be passed to a method.

logger.debug('message', {text: 'context1'}, {text: 'context2'}, {text: 'context3'});

IMPORTANT

All contexts serialized by JSON.stringify.

Getting stored logs

logger.getLogs();

Return a list of stored logs in the format:

[time] LOG_LEVEL message [context]

time calculating by next rules:

• first message stored current timestamp
• all next messages stored result of performance.now()

Config:

enum LOG_LEVEL {
  DEBUG = 'DEBUG',
  INFO = 'INFO',
  WARN = 'WARN',
  ERROR = 'ERROR',
  NONE = 'NONE'
}

Licence

License is MIT