const log4js = require('../lib/log4js'); log4js.configure({ appenders: { out: { type: 'console', layout: { type: 'pattern', pattern: '%[%r (%x{pid}) %p %c -%] %m%n', tokens: { pid: function () { return process.pid; } } } } }, categories: { default: { appenders: ['out'], level: 'info' } } }); const logger = log4js.getLogger('app'); logger.info('Test log message');