@rwdt/logger

A simple javascript library for log.

Install

Use npm

npm i @rwdt/logger --save

or use yarn

yarn add @rwdt/logger

Usage

Quick start

import { Logger } from '@rwdt/logger'

const logger = new Logger()

logger.debug('debug')
logger.info('info')
logger.warn('warn')
logger.error('error')

Set logger level

import { Logger } from '@rwdt/logger'

const logger = new Logger()
logger.setLevel('WARN') // or const logger = new Logger({level: 'WARN'})

logger.debug('debug')
logger.info('info')
logger.warn('warn')
logger.error('error')

Custom logger appender

write the log to file

import { Logger } from '@rwdt/logger'
import { writeFileSync } from 'fs'

const logger = new Logger()

logger.addAppender(loggingEvent => {
  writeFileSync('logger.log', JSON.stringify(), {
    flag: 'a'
  })
})

// or 
// const logger = new Logger({
//   appender: [loggingEvent => {
//     writeFileSync('logger.log', JSON.stringify(), {
//       flag: 'a'
//     })
//   }]
// })

logger.info('custom appender')

Set context

The context will be set to LoggingEvent

import { Logger } from '@rwdt/logger'

const logger = new Logger({context: 'any type context'})

// or logger.setContext({other: 'context'})

API

See types/index.d.ts