purescript-structured-logging

Log with timestamps and levels.

spago install structured-logging

import Node.Logger as Logger

Logger.info "message"

This will log with a timestamp and info log level:

{"timestamp":"2025-01-01T00:00:00.000Z","level":"INFO","message":"message"}

The log levels are defined as:

data LogLevel = INFO | WARN | ERROR

The log methods have the familiar MonadEffect classes:

info ∷ ∀ m. MonadEffect m ⇒ String → m Unit
warn ∷ ∀ m. MonadEffect m ⇒ String → m Unit
error ∷ ∀ m. MonadEffect m ⇒ String → m Unit

For convenience log is exported as an alias for info:

log ∷ ∀ m. MonadEffect m ⇒ String → m Unit

Documentation and more detailed examples are hosted on Pursuit.

To install dependencies:

yarn install
yarn spago install

To run tests:

yarn spago test

To generate the documentation locally:

yarn spago docs

To run linters:

yarn lint

To run formatters:

yarn format

Please read this repository's Code of Conduct which outlines our collaboration standards and the Changelog for details on breaking changes that have been made.

This repository adheres to semantic versioning standards. For more information on semantic versioning visit SemVer.

Bump2version is used to version and tag changes. For example:

bump2version patch

• Joel Lefkowitz - Initial work

Lots of love to the open source community!