LogTape

LogTape is a logging library for JavaScript and TypeScript. It provides a simple and flexible logging system that is easy to use and easy to extend. The highlights of LogTape are:

Zero dependencies: LogTape has zero dependencies. You can use LogTape without worrying about the dependencies of LogTape.
Library support: LogTape is designed to be used in libraries as well as applications. You can use LogTape in libraries to provide logging capabilities to users of the libraries.
Runtime diversity: LogTape supports Deno, Node.js, Bun, edge functions, and browsers. You can use LogTape in various environments without changing the code.
Structured logging: You can log messages with structured data.
Hierarchical categories: LogTape uses a hierarchical category system to manage loggers. You can control the verbosity of log messages by setting the log level of loggers at different levels of the category hierarchy.
Template literals: LogTape supports template literals for log messages. You can use template literals to log messages with placeholders and values.
Built-in data redaction: LogTape provides robust capabilities to redact sensitive information from logs using pattern-based or field-based approaches.
Dead simple sinks: You can easily add your own sinks to LogTape.

Installation

LogTape is available on JSR and npm. You can install LogTape for various JavaScript runtimes and package managers:

deno add jsr:@logtape/logtape  # for Deno
npm  add     @logtape/logtape  # for npm
pnpm add     @logtape/logtape  # for pnpm
yarn add     @logtape/logtape  # for Yarn
bun  add     @logtape/logtape  # for Bun

See also the installation manual for more details.

Packages

LogTape is a monorepo that contains several packages. The main package is @logtape/logtape, which provides the core logging functionality. Other packages provide additional features and integrations. The following is a list of the packages in the LogTape monorepo:

Package	JSR	npm	Description
@logtape/logtape	JSR	npm	Core logging functionality
@logtape/adaptor-pino	JSR	npm	Pino adapter
@logtape/adaptor-winston	JSR	npm	winston adapter
@logtape/cloudwatch-logs	JSR	npm	AWS CloudWatch Logs sink
@logtape/file	JSR	npm	File sinks
@logtape/otel	JSR	npm	OpenTelemetry sink
@logtape/pretty	JSR	npm	Beautiful text formatter
@logtape/redaction	JSR	npm	Data redaction
@logtape/sentry	JSR	npm	Sentry sink
@logtape/syslog	JSR	npm	Syslog sink
@logtape/windows-eventlog	JSR	npm	Windows Event Log sink

Docs

The docs of LogTape is available at https://logtape.org/. For the API references, see https://jsr.io/@logtape/logtape.