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.');