dmarell / slogger

Node js logger package. The name does not stand for what the word may suggest, instead it means a logger that is simple, structured and standard output

Node.js logging library

Output logs on standard output both in cloud and locally. The package has some features compared to logging using raw console.log:

• Simplified syntax
• Standard compact timestamp format
• Supports logging plain strings or an object
• Supports metadata for cloud logging (for example severity and labels) without ruining readability when running locally. Sets the parameter json in init to true when running in the cloud, for Stackdriver logging to pickup severity and metadata
• A http request logger for node express

Logger usage

const {logger} = require('@dmarell/slogger')

// Initialize logging before using it
logger.init(`config.envName && config.envName !== 'dev')

// Optionally set labels
logger.addLabel('appName', config.appName)
logger.addLabel('envName', config.envName)
logger.addLabel('version', process.env.VERSION)

// Logging examples
logger.error('logger error')
logger.warn('logger warn')
logger.info('logger info, %d', 42)
logger.info('The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog')
logger.debug('The Answer is %s, really.', 42)
logger.debug({foo: 'Text', bar: 42})
logger.debug({message: 'Text', value: 42})

RequestLogger usage

Used for logging HTTP request with Node Express. Does not log request body.

const {RequestLogger} = require('@dmarell/slogger')
const app = require('express')()
app.use(new RequestLogger().getMiddleware())