prettier-plugin-curly

0.4.1 verified Sat Apr 25 auth: no javascript

Prettier plugin to enforce consistent brace style for all control statements (for, if, while, etc.), adding curly braces around bodies. Current stable version is 0.4.1, released November 2025. It works alongside Prettier to enforce the equivalent of ESLint's curly 'all' rule, filling a gap where Prettier intentionally avoids modifying code structure. Requires Node >=18 and Prettier ^3. Version 0.4.0 introduced a complete rewrite using wrapped printers.estree. The plugin is actively maintained by JoshuaKGoldberg and the community.

Common errors

error Error: Cannot find module 'prettier-plugin-curly' ↓

cause Package not installed or Node.js cannot resolve it

fix

Run npm install prettier-plugin-curly --save-dev

error Error: The module 'prettier-plugin-curly' is not a Prettier plugin ↓

cause Using incorrect import or path configuration

fix

In .prettierrc, use "plugins": ["prettier-plugin-curly"] (string name) not a path

error Error [ERR_REQUIRE_ESM]: require() of ES Module ↓

cause Trying to use require() with ESM-only package (v0.4.0+)

fix

Use import syntax or downgrade to v0.3.x (but note Prettier 3 support may be limited)

error TypeError: prettierPluginCurly is not a function ↓

cause Incorrectly destructuring default export

fix

Use import prettierPluginCurly from 'prettier-plugin-curly' (default import) not { prettierPluginCurly }

Warnings

breaking Dropped support for Prettier 2 in v0.4.1 ↓

fix Upgrade to Prettier 3 and use prettier-plugin-curly ^0.4.1

breaking Complete rewrite in v0.4.0: plugin now exports a wrapped printers.estree instead of printers.ast ↓

fix Ensure no custom printer overrides conflict with new internal architecture

deprecated CommonJS require() no longer works in v0.4.0+ ↓

fix Use ESM imports or upgrade to v0.4.1 which may have limited CJS support (check release notes)

gotcha Plugin modifies Prettier output for all control statements unconditionally; cannot be configured to skip certain statements ↓

fix If selective behavior is needed, consider ESLint's curly rule instead

gotcha Plugin may conflict with other Prettier plugins that modify control statement printing ↓

fix Ensure plugin order in 'plugins' array places prettier-plugin-curly before any conflicting plugins

Install

npm install prettier-plugin-curly

yarn add prettier-plugin-curly

pnpm add prettier-plugin-curly

Imports

default

wrong

const prettierPluginCurly = require('prettier-plugin-curly')

correct

import prettierPluginCurly from 'prettier-plugin-curly'

ESM-only since v0.4.0; CommonJS require() will fail

default

wrong

module.exports = { plugins: ['./node_modules/prettier-plugin-curly'] }

correct

module.exports = { plugins: ['prettier-plugin-curly'] }

String name is preferred; path-based referencing may break with module resolution

prettierPluginCurly

wrong

const { default: prettierPluginCurly } = require('prettier-plugin-curly')

correct

import prettierPluginCurly from 'prettier-plugin-curly'

Named export 'default' is not used; default import is correct

Quickstart

Configures Prettier to use prettier-plugin-curly; shows transformation of single-line if to curly brace style.

// .prettierrc
{
  "plugins": ["prettier-plugin-curly"]
}

// Before: if (x) doSomething();
// After prettier formatting:
// if (x) {
//   doSomething();
// }