log4js 2.X版本配置详解

const log4js = require('log4js');
log4js.configure({
  appenders: { cheese: { type: 'file', filename: 'cheese.log' } },
  categories: { default: { appenders: ['cheese'], level: 'error' } }
});
 
const logger = log4js.getLogger('cheese');
logger.trace('Entering cheese testing');
logger.debug('Got cheese.');
logger.info('Cheese is Gouda.');
logger.warn('Cheese is quite smelly.');
logger.error('Cheese is too ripe!');
logger.fatal('Cheese was breeding ground for listeria.');

appender 指记录方式，

const log4js = require('log4js');

log4js.configure({

  appenders: { cheese: { type: 'file', filename: 'cheese.log' } },

  categories: { default: { appenders: ['cheese'], level: 'error' } }

});

 

const logger = log4js.getLogger('cheese');

logger.trace('Entering cheese testing');

logger.debug('Got cheese.');

logger.info('Cheese is Gouda.');

logger.warn('Cheese is quite smelly.');

logger.error('Cheese is too ripe!');

logger.fatal('Cheese was breeding ground for listeria.');