log4jsでロギング、ファイル出力

$ npm install log4js

import { getLogger, configure } from 'log4js'

const logger = getLogger()
logger.info('Test Logging.')

import { getLogger, configure } from 'log4js'

configure({
  appenders: {
    out: { type: 'stdout' },
    app: { type: 'file', filename: 'application.log' }
  },
  categories: {
    default: { appenders: ['out', 'app'], level: 'all' }
  }
})

const logger = getLogger()
logger.info('Test Logging.')