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!

This release includes improvements to the --cache option added in 2.7. A new --cache-location option has been added, and a bug that saved the cache even when --write wasn't specified has been fixed.

We're also adding support for TypeScript 4.9 satisfies operator!

If you enjoy Prettier and would like to support our work, consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, including typescript-eslint, remark, and Babel.

The Prettier team plans to release 3.0 within the next few months. If you are a plugin developer, get ready for the migration. Visit the migration guide and issue #13606 for more information.

This release includes a new --cache CLI option. Enabling this option will use some attributes as cache keys and format files only if they have changed. This could dramatically improve CLI performance.

We've also added support formatting for TypeScript 4.7 syntax!

If you enjoy Prettier and would like to support our work, consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, including typescript-eslint, remark, and Babel.

This release includes a new singleAttributePerLine option. This is an option to print only one attribute per line in Vue SFC templates, HTML, and JSX. Per our Option Philosophy, we would prefer not to add such an option. However, there are many users who want this feature, and major style guides like Airbnb’s JavaScript Style Guide and Vue’s style guide recommend the single attribute per line style. A PR to add this feature was opened in October 2019, and both it and the corresponding issue have received a significant amount of support from users. For us it was a hard decision to add this option. We hope the addition of this option will benefit many users without significantly harming our principles.

We've also added support formatting for some new JavaScript syntax proposals via Babel.

Prettier, an opinionated code formatter for JavaScript and many web languages, has been accepting donations at OpenCollective since 2019 and thanks to many generous donations we now have $50,000 in the bank! As a result, we are now able to pay the two active maintainers $1,500/month each. This funding will ensure that they will be able to continue consistent maintenance of Prettier into the future.

This release adds support for TypeScript 4.5's new syntax and MDX v2 comment syntax!

If you enjoy Prettier and would like to support our work, consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, including typescript-eslint, remark, and Babel.

This release renames the jsxBracketSameLine option to bracketSameLine, which supports HTML, Vue, and Angular in addition to JSX. The old name has been deprecated.

We’ve also added support for TypeScript 4.4, including new syntax features such as class static blocks.

If you enjoy Prettier and would like to support our work, consider sponsoring us directly via our OpenCollective or by sponsoring the projects we depend on, including typescript-eslint, remark, and Babel.