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tn-prettier-imports

A Prettier v3 plugin that keeps import and export statements on a single line, overriding Prettier's default of wrapping long specifier lists one-per-line.

// Prettier on its own                         // with tn-prettier-imports
import {                                        import { one, two, three, four, five, six } from './module'
  one,
  two,
  three,
  four,
  five,
  six,
} from './module'

Install

npm install --save-dev tn-prettier-imports
# or: yarn add -D tn-prettier-imports

Requires prettier@^3.

Usage

Add it to the plugins array of your Prettier config:

// .prettierrc.js
module.exports = {
  plugins: ['tn-prettier-imports'],
}

Works for JavaScript and TypeScript — .js, .jsx, .ts, .tsx (babel, babel-ts and typescript parsers).

What it collapses

Statement	Behavior
import { ... } from '...'	→ single line
import Default, { ... } from '…'	→ single line
import type { ... } from '...'	→ single line
import * as ns from '...'	→ single line
export { ... } (local)	→ single line
export { ... } from '...'	→ single line
export type { ... } from '...'	→ single line
export * from '...'	→ single line

Everything else is formatted exactly as vanilla Prettier would — object literals, export const/function/class declarations and export default are left untouched.

Comment safety

A statement that contains a line comment inside its braces is left in Prettier's multi-line layout, because collapsing it would let the // swallow the rest of the line:

import {
  one, // still here
  two,
} from './module'

Block comments (/* ... */) collapse inline and are preserved.

How it works

The plugin wraps Prettier's built-in estree printer. For each import / export statement it takes the Doc that the stock printer produced and rewrites it into its flat, single-line form; every other node is returned unchanged. See CLAUDE.md for the architecture.

Development

yarn install
yarn test     # node --test

License

MIT