//Note that slack appender needs slack-node package to work. var log4js = require('../lib/log4js'); log4js.configure({ "appenders": [ { "type" : "slack", "token": 'TOKEN', "channel_id": "#CHANNEL", "username": "USERNAME", "format": "text", "category" : "slack", "icon_url" : "ICON_URL" } ] }); var logger = log4js.getLogger("slack"); logger.warn("Test Warn message"); logger.info("Test Info message"); logger.debug("Test Debug Message"); logger.trace("Test Trace Message"); logger.fatal("Test Fatal Message"); logger.error("Test Error Message");