This release includes several important feature additions that we're excited to share with you.

First, we're shipping a new experimental high-performance CLI behind a feature flag (--experimental-cli). This CLI was previously only available in prettier@next, but now you can enable it simply by using a flag. We encourage you to try it out and share your feedback! If you are interested in the internal implementation, please read Prettier's CLI: Performance Deep Dive by Fabio.

Additionally, we're releasing two new official plugins: @prettier/plugin-oxc and @prettier/plugin-hermes. These plugins are provided separately from Prettier's core.

We want to extend our heartfelt gratitude to everyone who made this amazing release possible: @fabiospampinato, @43081j, and @pralkarz along with the new CLI contributors, @boshen and @overlookmotel along with other OXC contributors, the Flow and Hermes teams at Meta. Thank you all for your incredible contributions!

We're excited to see how these new features enhance your development experience. Happy formatting!

This release includes a lot of bug fixes and the following new features:

• Support for the new objectWrap option
• Support for the new experimental experimentalOperatorPosition option
• Support for TypeScript configuration file

See each section for details.

This release includes numerous bug fixes and other improvements.

If you appreciate Prettier and would like to support our work, please consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, such as typescript-eslint, remark, and Babel. Thank you for your continued support!

This release includes support for new Flow features such as component and hook declarations. All of these features were implemented by the engineers on the Flow team, thank you.

If you appreciate Prettier and would like to support our work, please consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, such as typescript-eslint, remark, and Babel. Thank you for your continued support!

This release includes new features such as adding a JSONC parser, adding Angular’s ICU expressions, and many bug fixes.

We are still seeking feedback for the --experimental-ternaries option released in Prettier 3.1. Please read A curious case of the ternaries and respond via the Google Forms link provided.

Additionally, we recommend reading Prettier's CLI: A Performance Deep Dive by Fabio Spampinato. This faster CLI is slated to be released as version 4.0.

Hey, I'm Fabio and I've been contracted by the Prettier team to speed up Prettier's command line interface (CLI). In this post we'll take a look at the optimizations I've discovered, the process that lead to finding them, some exciting numbers comparing the current CLI with the new one, and some guesses about what could be optimized next.

Prettier, a JavaScript code formatter, has seen an incredible adoption thanks to its careful handling of the very, very, long tail of ways people can write code. At this point, the formatting logic has been solid and after our work on ternaries lands, it will be in a happy state.

This means that we can now focus on the next important aspect: Performance. Prettier has never been fast per se, but fast enough for most use cases. This has always felt unsatisfying so we wanted to do something about it. What better way than a friendly competition.

On November 9th, we put up a $10k bounty for any project written in Rust that would pass 95% of Prettier test suite. Guillermo Rauch, CEO of Vercel, matched it to bring it to $20k and napi.rs added another $2.5k. The folks at Algora even made an amazing landing page for it.

This release adds indentation back to nested ternaries along with a new --experimental-ternaries flag to try a more novel "curious ternary" format that scales better to deeply nested conditionals. We are keen for your feedback on the experimental format before it rolls out as the default behavior later this year!

We have also added support for the control flow syntax in Angular v17. For details on the syntax, please read the official Angular release post.

Ternary formatting has always been a challenge, and we're finally addressing it in v3.1.0 with the introduction of a novel formatting style.

Read on for our journey and the motivation behind this change, along with early developer feedback and an overview of the "curious ternaries" style.

Please give the --experimental-ternaries option a try and let us know what you think!

For a quick tl;dr, see the release post.

We are excited to announce the release of the new version of Prettier!

We have made the migration to using ECMAScript Modules for all our source code. This change has significantly improved the development experience for the Prettier team. Please rest assured that when using Prettier as a library, you can still use it as CommonJS as well.

This update comes with several breaking changes. One notable example is the alteration in markdown formatting - spaces are no longer inserted between Latin characters and Chinese or Japanese characters. We'd like to extend our gratitude to Tatsunori Uchino, who has made significant contributions to Prettier over the past year, particularly with this feature. Additionally, the default value of trailingComma has been changed to "all".

Another important change in this release is the significant overhaul of the plugin interface. Prettier now supports plugins written using ECMAScript Modules and async parsers. If you're a plugin developer, please exercise caution while updating. You can find the migration guide here. As always, we welcome bug reports and feedback!

This release also includes numerous formatting improvements and bug fixes.

If you appreciate Prettier and would like to support our work, please consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, such as typescript-eslint, remark, and Babel. Thank you for your continued support!