Registry / devops / prettier-reflow

prettier-reflow

library2.2.1jsnpmunverified

Prettier is an opinionated code formatter that enforces a consistent code style by parsing your code and re-printing it with its own rules, taking maximum line length into account. Version 2.2.1 supports JavaScript, TypeScript, Flow, JSX, JSON, CSS, SCSS, Less, HTML, Vue, Angular, GraphQL, Markdown, and YAML. It can be run in editors on-save, pre-commit hooks, or CI environments. Prettier has a large active community with frequent releases and extensive plugin ecosystem. Key differentiators: automatic code formatting without configuration debates, wide language support, and integration with most editors and tools. Requires Node.js >=10.13.0.

devops

npm install prettier-reflow

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · PRETTIER-REFLOW

prettier-reflow

devopsjavascriptv2.2.1

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

format

✓ import { format } from 'prettier'

✗ const format = require('prettier').format

Prettier supports both ESM and CommonJS; the named import works in both environments.

check

✓ import { check } from 'prettier'

✗ import * as prettier from 'prettier'; prettier.check(source, options)

check is a named export that returns a boolean indicating if the file is already formatted.

resolveConfig

✓ import { resolveConfig } from 'prettier'

✗ import { resolveConfig } from 'prettier/config'

resolveConfig is a top-level export for loading configuration files.

Demonstrates how to format a JavaScript source code string using the prettier API with parser and options.

import { format } from 'prettier'; const sourceCode = `const add = (a,b)=>a+b;`; const formatted = format(sourceCode, { parser: 'babel', semi: true, singleQuote: true }); console.log(formatted); // Output: // const add = (a, b) => a + b;

prettier --version

Debug

Known issues

breakingPrettier 2.0 changed default value for trailingComma from 'none' to 'es5'.

fix

Add trailingComma: 'none' to your config if you want to restore the previous behavior.

affects: >=2.0.0

breakingPrettier 2.0 removed support for Node.js 8 and older.

fix

Upgrade Node.js to version >=10.13.0.

affects: >=2.0.0

breakingPrettier 2.0 changed default value for arrowParens from 'avoid' to 'always'.

fix

Add arrowParens: 'avoid' to your config to keep the old style.

affects: >=2.0.0

gotchaPrettier does not format code in template literals by default.

fix

Use prettier-ignore comments or manually format embedded code.

affects: *

gotchaPrettier may break certain patterns like complex ternaries or chained operations when line length is exceeded.

fix

Use // prettier-ignore comments to opt out of formatting for specific lines.

affects: *

Errors

Common errors & fixes

Cannot find module 'prettier'

Prettier is not installed in the project.

fix

Run 'npm install prettier --save-dev' (or yarn add prettier --dev).

Unexpected token '=>' (or similar parse error)

Parser option does not match the file type or the file contains syntax not supported by the parser.

Invalid configuration file: .prettierrc

The configuration file is malformed (e.g., trailing commas in JSON).

fix

Ensure .prettierrc is valid JSON or use a supported format like YAML or TOML.

Upgrade

Version history

2.2.1latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

13 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/grubersjoe/prettier-reflow ↗

packagehttps://www.npmjs.com/package/prettier-reflow ↗

homepagehttps://prettier.io ↗