#LogTape

The next release of #LogTape will include adapters for popular logging libraries Pino and winston.

The next release of #LogTape will include adapters for popular logging libraries Pino and winston.

The next release of #LogTape will include adapters for popular logging libraries Pino and winston.

The next release of #LogTape will include adapters for popular logging libraries Pino and winston.

I implemented data redaction for #LogTape today. The feature will be available through a dedicated package called @logtape/redaction (JSR & npm). It provides two complementary approaches to protect sensitive information in your logs:

1. Pattern-based redaction: Uses regex patterns to identify and mask sensitive data in formatted log output
2. Field-based redaction: Redacts properties by field names in structured log data

Looking forward to releasing this with LogTape 0.10.0 soon!

I implemented data redaction for #LogTape today. The feature will be available through a dedicated package called @logtape/redaction (JSR & npm). It provides two complementary approaches to protect sensitive information in your logs:

1. Pattern-based redaction: Uses regex patterns to identify and mask sensitive data in formatted log output
2. Field-based redaction: Redacts properties by field names in structured log data

Looking forward to releasing this with LogTape 0.10.0 soon!

Just released #LogTape 0.9.0! 🎉

This version brings two major improvements to our zero-dependency #logging library for #TypeScript:

1. New Synchronous Configuration API: You can now configure LogTape synchronously with configureSync(), disposeSync(), and resetSync(). Perfect for simpler setups where you don't need async operations!

2. Better Runtime Compatibility: We've moved all file-related components to a separate @logtape/file package. This means the core package now works flawlessly across all JavaScript environments—browsers, edge functions, and various bundlers without any file system dependencies.

Plus, we've added level mapping options for console sinks, giving you more control over how your logs appear.

Check out the full release notes for migration details:

https://hackers.pub/@hongminhee/2025/logtape-090

#LogTape 0.9.0をリリースしました！🎉

今回のバージョンでは、TypeScript向けの依存関係ゼロのロギングライブラリに二つの大きな改善を加えました：

1. 新しい同期設定API：configureSync()、disposeSync()、resetSync()を使って同期的にLogTapeを設定できるようになりました。非同期操作が不要なシンプルな環境に最適です！

2. ランタイム互換性の向上：ファイル関連のコンポーネントをすべて別パッケージ@logtape/fileに移動しました。これにより、コアパッケージはファイルシステム依存なしで、ブラウザ、エッジ関数、各種バンドラーなど、あらゆるJavaScript環境でシームレスに動作します。

さらに、コンソールシンクにレベルマッピングオプションを追加し、ログの表示方法をより細かく制御できるようになりました。

移行の詳細については、リリースノートをご覧ください。

https://zenn.dev/hongminhee/articles/98989e400c5fcf

#JavaScript #TypeScript #ロギング

Just released #LogTape 0.9.0! 🎉

This version brings two major improvements to our zero-dependency #logging library for #TypeScript:

1. New Synchronous Configuration API: You can now configure LogTape synchronously with configureSync(), disposeSync(), and resetSync(). Perfect for simpler setups where you don't need async operations!

2. Better Runtime Compatibility: We've moved all file-related components to a separate @logtape/file package. This means the core package now works flawlessly across all JavaScript environments—browsers, edge functions, and various bundlers without any file system dependencies.

Plus, we've added level mapping options for console sinks, giving you more control over how your logs appear.

Check out the full release notes for migration details:

https://hackers.pub/@hongminhee/2025/logtape-090

Just released #LogTape 0.9.0! 🎉

This version brings two major improvements to our zero-dependency #logging library for #TypeScript:

1. New Synchronous Configuration API: You can now configure LogTape synchronously with configureSync(), disposeSync(), and resetSync(). Perfect for simpler setups where you don't need async operations!

2. Better Runtime Compatibility: We've moved all file-related components to a separate @logtape/file package. This means the core package now works flawlessly across all JavaScript environments—browsers, edge functions, and various bundlers without any file system dependencies.

Plus, we've added level mapping options for console sinks, giving you more control over how your logs appear.

Check out the full release notes for migration details:

https://hackers.pub/@hongminhee/2025/logtape-090

#LogTape 0.9.0をリリースしました！🎉

今回のバージョンでは、TypeScript向けの依存関係ゼロのロギングライブラリに二つの大きな改善を加えました：

1. 新しい同期設定API：configureSync()、disposeSync()、resetSync()を使って同期的にLogTapeを設定できるようになりました。非同期操作が不要なシンプルな環境に最適です！

2. ランタイム互換性の向上：ファイル関連のコンポーネントをすべて別パッケージ@logtape/fileに移動しました。これにより、コアパッケージはファイルシステム依存なしで、ブラウザ、エッジ関数、各種バンドラーなど、あらゆるJavaScript環境でシームレスに動作します。

さらに、コンソールシンクにレベルマッピングオプションを追加し、ログの表示方法をより細かく制御できるようになりました。

移行の詳細については、リリースノートをご覧ください。

https://zenn.dev/hongminhee/articles/98989e400c5fcf

#JavaScript #TypeScript #ロギング

Just released #LogTape 0.9.0! 🎉

This version brings two major improvements to our zero-dependency #logging library for #TypeScript:

1. New Synchronous Configuration API: You can now configure LogTape synchronously with configureSync(), disposeSync(), and resetSync(). Perfect for simpler setups where you don't need async operations!

2. Better Runtime Compatibility: We've moved all file-related components to a separate @logtape/file package. This means the core package now works flawlessly across all JavaScript environments—browsers, edge functions, and various bundlers without any file system dependencies.

Plus, we've added level mapping options for console sinks, giving you more control over how your logs appear.

Check out the full release notes for migration details:

https://hackers.pub/@hongminhee/2025/logtape-090

Just responded to some browser compatibility issues with #LogTape. Turns out bundling everything in one package creates headaches for Next.js and other browser environments.

For the next minor version, we're breaking things up:

• @logtape/logtape will be browser-friendly with zero compromises
• @logtape/file will handle filesystem operations
• Other specialized features will get their own packages

This should make LogTape work seamlessly across all environments while giving developers better control over what they include.

Just responded to some browser compatibility issues with #LogTape. Turns out bundling everything in one package creates headaches for Next.js and other browser environments.

For the next minor version, we're breaking things up:

• @logtape/logtape will be browser-friendly with zero compromises
• @logtape/file will handle filesystem operations
• Other specialized features will get their own packages

This should make LogTape work seamlessly across all environments while giving developers better control over what they include.

I am to resolve the pending issues of #LogTape this evening.

Haven't talked about LogTape in a while—it's a #logging library I made for #JavaScript and #TypeScript. You know how logging can be a pain point in JavaScript/TypeScript development? Well, I tried to address some common frustrations.

What makes it special

Zero dependencies

We've all been there with dependency hell, right? #LogTape has absolutely no external dependencies. Install it without worrying about bloating your node_modules.

Hierarchical categories

You can organize your logs in a tree structure. Want to save only database-related logs to a file? Easy to do. Child categories can inherit settings from their parents too, which keeps things clean and manageable.

Library-friendly

Writing a library and want to include logs without stepping on your users' toes? LogTape lets you add logging to your library while giving end users complete control over how those logs are handled.

Structured logging

Plain text logs not cutting it? LogTape supports structured logging. Makes log analysis way easier down the road.

Runs anywhere

Works smoothly in Node.js, Deno, Bun, browsers, and even edge functions. No special configuration needed.

Check out https://logtape.org/ if you're interested in learning more.

Haven't talked about LogTape in a while—it's a #logging library I made for #JavaScript and #TypeScript. You know how logging can be a pain point in JavaScript/TypeScript development? Well, I tried to address some common frustrations.

What makes it special

Zero dependencies

We've all been there with dependency hell, right? #LogTape has absolutely no external dependencies. Install it without worrying about bloating your node_modules.

Hierarchical categories

You can organize your logs in a tree structure. Want to save only database-related logs to a file? Easy to do. Child categories can inherit settings from their parents too, which keeps things clean and manageable.

Library-friendly

Writing a library and want to include logs without stepping on your users' toes? LogTape lets you add logging to your library while giving end users complete control over how those logs are handled.

Structured logging

Plain text logs not cutting it? LogTape supports structured logging. Makes log analysis way easier down the road.

Runs anywhere

Works smoothly in Node.js, Deno, Bun, browsers, and even edge functions. No special configuration needed.

Check out https://logtape.org/ if you're interested in learning more.

Haven't talked about LogTape in a while—it's a #logging library I made for #JavaScript and #TypeScript. You know how logging can be a pain point in JavaScript/TypeScript development? Well, I tried to address some common frustrations.

What makes it special

Zero dependencies

We've all been there with dependency hell, right? #LogTape has absolutely no external dependencies. Install it without worrying about bloating your node_modules.

Hierarchical categories

You can organize your logs in a tree structure. Want to save only database-related logs to a file? Easy to do. Child categories can inherit settings from their parents too, which keeps things clean and manageable.

Library-friendly

Writing a library and want to include logs without stepping on your users' toes? LogTape lets you add logging to your library while giving end users complete control over how those logs are handled.

Structured logging

Plain text logs not cutting it? LogTape supports structured logging. Makes log analysis way easier down the road.

Runs anywhere

Works smoothly in Node.js, Deno, Bun, browsers, and even edge functions. No special configuration needed.

Check out https://logtape.org/ if you're interested in learning more.

Perhaps unsurprisingly, every project I've been working on in TypeScript lately has been using #LogTape: @fedify, @hollo, @botkit, Hackers' Pub…

Haven't talked about LogTape in a while—it's a #logging library I made for #JavaScript and #TypeScript. You know how logging can be a pain point in JavaScript/TypeScript development? Well, I tried to address some common frustrations.

What makes it special

Zero dependencies

We've all been there with dependency hell, right? #LogTape has absolutely no external dependencies. Install it without worrying about bloating your node_modules.

Hierarchical categories

You can organize your logs in a tree structure. Want to save only database-related logs to a file? Easy to do. Child categories can inherit settings from their parents too, which keeps things clean and manageable.

Library-friendly

Writing a library and want to include logs without stepping on your users' toes? LogTape lets you add logging to your library while giving end users complete control over how those logs are handled.

Structured logging

Plain text logs not cutting it? LogTape supports structured logging. Makes log analysis way easier down the road.

Runs anywhere

Works smoothly in Node.js, Deno, Bun, browsers, and even edge functions. No special configuration needed.

Check out https://logtape.org/ if you're interested in learning more.

Haven't talked about LogTape in a while—it's a #logging library I made for #JavaScript and #TypeScript. You know how logging can be a pain point in JavaScript/TypeScript development? Well, I tried to address some common frustrations.

What makes it special

Zero dependencies

We've all been there with dependency hell, right? #LogTape has absolutely no external dependencies. Install it without worrying about bloating your node_modules.

Hierarchical categories

You can organize your logs in a tree structure. Want to save only database-related logs to a file? Easy to do. Child categories can inherit settings from their parents too, which keeps things clean and manageable.

Library-friendly

Writing a library and want to include logs without stepping on your users' toes? LogTape lets you add logging to your library while giving end users complete control over how those logs are handled.

Structured logging

Plain text logs not cutting it? LogTape supports structured logging. Makes log analysis way easier down the road.

Runs anywhere

Works smoothly in Node.js, Deno, Bun, browsers, and even edge functions. No special configuration needed.

Check out https://logtape.org/ if you're interested in learning more.

Just released @logtape/sentry, a #LogTape sink for @getsentry! Now you can easily send your logs to #Sentry.

https://github.com/dahlia/logtape-sentry

#logtape #hollo #package Simple logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions https://logtape.org/

Star History of #Fedify, #Hollo, and #LogTape:

https://star-history.com/#dahlia/fedify&dahlia/logtape&dahlia/hollo&Date

#LogTape 0.7.0をリリースしました！

新機能の暗黙的コンテキストにより、リクエストID、ユーザーIDなどの文脈情報を、手動で渡すことなくログに自動的に含められるようになりました。

詳しくは記事をご覧ください：

https://zenn.dev/hongminhee/articles/3de34c66bdddb2

#TypeScript #JavaScript #logging

Just released #LogTape 0.7.0 with implicit contexts! Now you can automatically include request IDs, user IDs, and more in your logs without passing context manually. Read more about this powerful feature:

https://dev.to/hongminhee/introducing-implicit-contexts-in-logtape-070-57fi

#TypeScript #JavaScript #logging

#LogTape v0.6.0, a zero-dependency structured logging library for #JavaScript & #TypeScript, has been released. The main changes include:

• Loggers now can override sinks of their ascendants.
• Placeholders in message templates now forgive leading and trailing spaces.
• Added LogRecord.rawMessage property.
• Built-in text formatters now can be customized.

Available now from JSR and npm:

• JSR: https://jsr.io/@logtape/logtape@0.6.0
• npm: https://www.npmjs.com/package/@logtape/logtape/v/0.6.0

Starting with the next version of #LogTape, the built-in text formatters will be highly customizable.

https://unstable.logtape.org/manual/formatters#configuring-text-formatters

Refactoring #LogTape's built-in text formatters… It will provide options for more flexible configuration.

Oh, the #LogTape's GitHub repository has reached 400 stars!

https://github.com/dahlia/logtape

Version 0.5.0 of #LogTape, the zero-dependency #logging library for #Deno, #Node.js, #Bun, edge functions, and browsers, has been released! The main additions include:

• Contexts
• ANSI color formatter
• Comprehensive docs
• A few API conveniences

LogTape v0.5.0 is available from JSR and npm:

• JSR: https://jsr.io/@logtape/logtape@0.5.0
• npm: https://www.npmjs.com/package/@logtape/logtape/v/0.5.0

In addition, a new website with documentation has been launched, so please check it out!

https://logtape.org/

#JavaScript #TypeScript

#LogTape got its website now!

https://logtape.org/

Working on the #LogTape website… #VitePress saves me again.

Okay, all done. You can now use #LogTape to send logs directly to the #OpenTelemetry collector!

https://github.com/dahlia/logtape-otel

I'm implementing an #OpenTelemetry sink for #LogTape, but it's more complicated than I thought and has a lot of package dependencies… 🤔

QiitaにLogTapeの紹介文を日本語で書いて載せました。翻訳機とAIを多用したため、不自然な日本語があるかもしれませんが、不適切な表現を見つけたらぜひご指摘ください！

https://qiita.com/hongminhee/items/fff0ce9c8ae50e70496b

#Qiita #LogTape #JavaScript #TypeScript #ロギング

Wow, a lot of people starred the #LogTape repo overnight! It's now over 200 stars, thank you.

In the next version of #LogTape, a zero-dependency #logging library for #JavaScript & #TypeScript, contexts will be introduced that allow the same set of properties to be shared across multiple log messages. Thanks to @okikio for collaborating on the design! This feature is available for preview in 0.5.0-dev.60+f819929c.

• JSR: https://jsr.io/@logtape/logtape@0.5.0-dev.60+f819929c
• npm: https://www.npmjs.com/package/@logtape/logtape/v/0.5.0-dev.60

https://github.com/dahlia/logtape#contexts

#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
• Designed to be used in libraries as well as apps
• Supports virtually every runtime: #Node.js, #Deno, #Bun, edge functions, and browsers
• Structured logging
• Logger categories (names) are hierarchical
• Dead simple sink (destination) interface

https://logtape.org/

Released v0.4.2 of #LogTape, which is a zero-dependency #logging library for #TypeScript & #JavaScript! Since this version, it work well on #Cloudflare Workers out of box!

• JSR: https://jsr.io/@logtape/logtape@0.4.2
• npm: https://www.npmjs.com/package/@logtape/logtape/v/0.4.2

#CloudflareWorkers #log #logger

#Fedify offers robust logging capabilities through integration with LogTape. This feature allows you to easily debug and monitor your Fedify app!

To enable #logging, simply install the @logtape/logtape package and configure it in your app's entry point:

import { configure, getConsoleSink } from "@logtape/logtape";

await configure({
  sinks: { console: getConsoleSink() },
  filters: {},
  loggers: [
    { category: "your-app", sinks: ["console"], level: "debug" },
    { category: "fedify",   sinks: ["console"], level: "info" },
  ],
});

Fedify uses hierarchical categories for fine-grained control over log output. Key categories include ["fedify", "federation", "http"] for HTTP requests/responses and ["fedify", "federation", "inbox"]/["fedify", "federation", "outbox"] for incoming/outgoing activities. (There are more categories.)

With #LogTape integration, you gain valuable insights into your Fedify app's behavior, making troubleshooting and optimization much more straightforward!

https://fedify.dev/manual/log

#fedidev

#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
• Designed to be used in libraries as well as apps
• Supports virtually every runtime: #Node.js, #Deno, #Bun, edge functions, and browsers
• Structured logging
• Logger categories (names) are hierarchical
• Dead simple sink (destination) interface

https://github.com/dahlia/logtape

Thanks to @kitsonk, #LogTape's bug where it failed to load under #Node.js when incorporated in a project from #JSR was fixed! The fix is now available at LogTape 0.4.1.

https://jsr.io/@logtape/logtape@0.4.1