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pino

Very low overhead Node.js logger.

Documentation

• Benchmarks ⇗
• API ⇗
• Browser API ⇗
• Redaction ⇗
• Child Loggers ⇗
• Transports ⇗
• Web Frameworks ⇗
• Pretty Printing ⇗
• Asynchronous Logging ⇗
• Ecosystem ⇗
• Help ⇗
• Long Term Support Policy ⇗

Install

$ npm install pino

If you would like to install pino v6, refer to https://github.com/pinojs/pino/tree/v6.x.

Usage

const logger = require('pino')()

logger.info('hello world')

const child = logger.child({ a: 'property' })
child.info('hello child!')

This produces:

{"level":30,"time":1531171074631,"msg":"hello world","pid":657,"hostname":"Davids-MBP-3.fritz.box"}
{"level":30,"time":1531171082399,"msg":"hello child!","pid":657,"hostname":"Davids-MBP-3.fritz.box","a":"property"}

For using Pino with a web framework see:

• Pino with Fastify
• Pino with Express
• Pino with Hapi
• Pino with Restify
• Pino with Koa
• Pino with Node core http
• Pino with Nest

Essentials

Development Formatting

The pino-pretty module can be used to format logs during development:

Transports & Log Processing

Due to Node's single-threaded event-loop, it's highly recommended that sending, alert triggering, reformatting and all forms of log processing be conducted in a separate process or thread.

In Pino terminology we call all log processors "transports", and recommend that the transports be run in a worker thread using our pino.transport API.

For more details see our Transports⇗ document.

Low overhead

Using minimum resources for logging is very important. Log messages tend to get added over time and this can lead to a throttling effect on applications – such as reduced requests per second.

In many cases, Pino is over 5x faster than alternatives.

See the Benchmarks document for comparisons.

Bundling support

Pino supports to being bundled using tools like webpack or esbuild.

See Bundling document for more informations.

The Team

Matteo Collina

https://github.com/pinojs

https://www.npmjs.com/~matteo.collina

https://twitter.com/matteocollina

David Mark Clements

https://github.com/davidmarkclements

https://www.npmjs.com/~davidmarkclements

https://twitter.com/davidmarkclem

James Sumners

https://github.com/jsumners

https://www.npmjs.com/~jsumners

https://twitter.com/jsumners79

Thomas Watson Steen

https://github.com/watson

https://www.npmjs.com/~watson

https://twitter.com/wa7son

Contributing

Pino is an OPEN Open Source Project. This means that:

Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.

See the CONTRIBUTING.md file for more details.

Acknowledgements

This project was kindly sponsored by nearForm.

Logo and identity designed by Cosmic Fox Design: https://www.behance.net/cosmicfox.

License

Licensed under MIT.