Write a pretty printer in Rust
Win $25,000

The Prettier Bounty is a challenge to write a prettier-compliant pretty printer in Rust

Grand Prize

$22,500

Pass > 95% of the prettier JavaScript tests

Read the Announcement

Announcement

WASIX Prize

$2,500

Compile to WASIX and publish (via CI) to Wasmer

Read the Announcement

Announcement

👁 Background

Christopher Chedeau

$10,000

👁 Guillermo Rauch

Guillermo Rauch

$10,000

👁 Wasmer

Wasmer

$2,500

👁 NAPI-RS

NAPI-RS

$2,500

Participate

Have a question? Send us an email at info@algora.io and we’ll get back to you as soon as we can!

Challenge specs

The bounty is split into two distinct prize pools: Grand Prize & WASIX Prize.

Winning the Grand Prize requires passing > 95% of the prettier JavaScript tests.

Winning the WASIX Prize requires compiling the formatter to WASIX and publishing it to Wasmer via CI.

The scope for the challenge is JavaScript — only ES6 syntax is required.

TypeScript, GraphQL, CSS, or any other embedded language or unstable syntax are out of scope for the challenge.

All formatting options must be supported.

The bounty will be awarded to the first successful solution.

You can (and are encouraged to) work as a team and split the bounty with your teammates.

🎉 Winner 🎉

Average compatibility: 96.10%
Compatible lines: 96.62%
Pull requests: 42
Contributors: 9

Contributor	Pull request	Status	Created
👁 faultyserver faultyserver	add `bracketSpacing` option matching Prettier's setting	Merged	Oct 30, 2023, 02:23:29 AM
👁 Conaclos Conaclos	predictable order of type parameter modifiers	Merged	Nov 14, 2023, 04:16:01 PM
👁 Conaclos Conaclos	Attach comments to labels	Merged	Nov 15, 2023, 00:24:15 AM
👁 TaKO8Ki TaKO8Ki	fix self closing compatibility with Prettier	Merged	Nov 15, 2023, 06:56:58 AM
👁 Conaclos Conaclos	don't print empty import assertion	Merged	Nov 15, 2023, 03:19:50 PM
👁 Conaclos Conaclos	add parens around instantiation expr when needed	Merged	Nov 16, 2023, 00:57:36 AM
👁 victor-teles victor-teles	consider JsArrayHole as simple argument	Merged	Nov 16, 2023, 02:15:28 AM
👁 Conaclos Conaclos	fix arrow function expression needs parens	Merged	Nov 16, 2023, 00:40:54 PM
👁 Conaclos Conaclos	fix uneeded parens on decoaretd class expr	Merged	Nov 16, 2023, 06:24:03 PM
👁 Conaclos Conaclos	fix default export expression parens	Merged	Nov 16, 2023, 06:57:22 PM
👁 Conaclos Conaclos	no space after asserts without predicate	Merged	Nov 16, 2023, 07:19:03 PM
👁 faultyserver faultyserver	(also parser) Respect, parse, and format BOM characters from source files	Merged	Nov 17, 2023, 11:16:47 AM
👁 Conaclos Conaclos	ignore embdedded languages and unstable syntaxes	Merged	Nov 17, 2023, 04:58:16 PM
👁 Conaclos Conaclos	edge case with expression statement and type cast	Merged	Nov 17, 2023, 06:06:48 PM
👁 victor-teles victor-teles	handle line break and comments for array holes	Merged	Nov 17, 2023, 10:05:01 PM
👁 faultyserver faultyserver	Handle more unary and update expressions as simple arguments	Merged	Nov 17, 2023, 11:07:11 PM
👁 Conaclos Conaclos	remove trailing spaces after shebang	Merged	Nov 17, 2023, 11:29:15 PM
👁 faultyserver faultyserver	allow `require` to split lines	Merged	Nov 17, 2023, 11:43:51 PM
👁 Conaclos Conaclos	ignore throw expression	Merged	Nov 17, 2023, 11:54:36 PM
👁 Conaclos Conaclos	format numeric properties and unquote exact floats	Merged	Nov 18, 2023, 01:51:45 AM
👁 unvalley unvalley	quit hard line break if default clause has no consequent	Merged	Nov 18, 2023, 08:24:17 AM
👁 TaKO8Ki TaKO8Ki	add a block indent to dangling comments	Merged	Nov 18, 2023, 03:38:13 PM
👁 TaKO8Ki TaKO8Ki	check if the third member of test call expression is appropriate	Merged	Nov 18, 2023, 10:47:37 PM
👁 victor-teles victor-teles	fix unnecessary indent to nested await	Merged	Nov 19, 2023, 01:18:42 AM
👁 Gumichocopengin8 Gumichocopengin8	respect prettier `Range` options	Merged	Nov 19, 2023, 02:19:43 AM
👁 Yash-Singh1 Yash-Singh1	fix typescript/union/inlining	Merged	Nov 19, 2023, 05:31:34 AM
👁 victor-teles victor-teles	assignment with await/yield do not break	Merged	Nov 19, 2023, 09:00:25 AM
👁 faultyserver faultyserver	Handle special first-argument expansions in call arguments	Merged	Nov 19, 2023, 09:57:47 AM
👁 TaKO8Ki TaKO8Ki	fix prettier differences in test declarations	Merged	Nov 19, 2023, 00:17:28 PM
👁 suxin2017 suxin2017	arrows comment	Merged	Nov 19, 2023, 04:11:56 PM
👁 SuperchupuDev SuperchupuDev	add `lineEnding` option	Merged	Nov 19, 2023, 05:41:56 PM
👁 TaKO8Ki TaKO8Ki	add parens to tail body for a chain of arrow functions	Merged	Nov 19, 2023, 07:43:53 PM
👁 Conaclos Conaclos	highligh prettier reformat issue	Merged	Nov 19, 2023, 08:11:21 PM
👁 faultyserver faultyserver	Fix multi-expression template literal indention	Merged	Nov 19, 2023, 09:18:59 PM
👁 Yash-Singh1 Yash-Singh1	fix typescript declarations and soft wrap index signatures	Merged	Nov 19, 2023, 09:25:02 PM
👁 faultyserver faultyserver	Implement `bracketSameLine` option to match Prettier	Merged	Nov 20, 2023, 02:27:55 AM
👁 victor-teles victor-teles	sloppy mode tests	Merged	Nov 20, 2023, 05:20:09 AM
👁 Yash-Singh1 Yash-Singh1	`noInitializerWithDefinite` rule	Merged	Nov 20, 2023, 06:54:22 AM
👁 suxin2017 suxin2017	arrows chain as arg	Merged	Nov 20, 2023, 11:34:08 AM
👁 Conaclos Conaclos	disambiguate unary expr in instanceof and in expr	Merged	Nov 20, 2023, 11:50:44 AM
👁 Conaclos Conaclos	handle let variable name in non-strict mode	Merged	Nov 21, 2023, 01:33:50 PM
👁 Conaclos Conaclos	indent nested conditional expressions	Merged	Nov 21, 2023, 03:51:56 PM

URL: https://algora.io/challenges/prettier

⇱ Algora

Write a pretty printer in Rust
Win $25,000

Grand Prize

$22,500

WASIX Prize

$2,500

Sponsors

Christopher Chedeau

$10,000

Guillermo Rauch

$10,000

Wasmer

$2,500

NAPI-RS

$2,500

Participate

Challenge specs

🎉 Winner 🎉

URL: https://algora.io/challenges/prettier

⇱ Algora

Write a pretty printer in Rust Win $25,000

Grand Prize

$22,500

WASIX Prize

$2,500

Sponsors

Christopher Chedeau

$10,000

Guillermo Rauch

$10,000

Wasmer

$2,500

NAPI-RS

$2,500

Participate

Challenge specs

🎉 Winner 🎉

Write a pretty printer in Rust
Win $25,000