rollup-plugin-bundle-less

0.0.7 verified Mon Apr 27 auth: no javascript maintenance

A Rollup plugin that bundles imported LESS files into a single LESS output file at version 0.0.7. It works by specifying an entry LESS file (default styles.less), then inlining all @import statements recursively into one bundled file. This plugin targets only LESS preprocessing, not full compilation to CSS. It is a thin wrapper around less-bundle and has no active releases since initial publish; use with caution as it may lack maintenance for modern Rollup versions or advanced features.

Common errors

error Cannot find module 'less-bundle' ↓

cause Missing dependency less-bundle not installed automatically.

fix

Run 'npm install less-bundle' alongside this plugin.

error TypeError: lessBundler is not a function ↓

cause Used named import instead of default import, or used require without .default.

fix

Use default import: import lessBundler from 'rollup-plugin-bundle-less'

error Error: Cannot read properties of undefined (reading 'src') ↓

cause Plugin called without options object.

fix

Provide options object, e.g., lessBundler({ src: 'styles.less' })

Warnings

gotcha Plugin does not compile LESS to CSS; output remains .less file. ↓

fix Use rollup-plugin-less or rollup-plugin-postcss if you need CSS output.

gotcha Options 'source' and 'destination' are silently ignored; use 'src' and 'dest'. ↓

fix Correct option keys: src, dest.

breaking Unmaintained since 2019; may not work with Rollup >=3. ↓

fix Test compatibility or consider alternative plugins.

Install

npm install rollup-plugin-bundle-less

yarn add rollup-plugin-bundle-less

pnpm add rollup-plugin-bundle-less

Imports

default

wrong

import { lessBundler } from 'rollup-plugin-bundle-less'

correct

import lessBundler from 'rollup-plugin-bundle-less'

The plugin exports a default function. Named import will result in undefined.

options (src, dest)
wrong
```
lessBundler({ source: 'app.less', destination: 'dist/main.less' })
```
correct
```
lessBundler({ src: 'app.less', dest: 'dist/main.less' })
```
Only 'src' and 'dest' are recognized option keys. Using 'source' or 'destination' will be silently ignored.

CommonJS require

wrong

const lessBundler = require('rollup-plugin-bundle-less')

correct

const lessBundler = require('rollup-plugin-bundle-less').default

In CJS environments, .default is needed because the package uses ESM export default.

Quickstart

Configures Rollup to bundle all LESS imports from src/styles.less into dist/bundled.less using rollup-plugin-bundle-less.

import lessBundler from 'rollup-plugin-bundle-less';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/bundle.js',
    format: 'esm'
  },
  plugins: [
    lessBundler({
      src: 'src/styles.less',
      dest: 'dist/bundled.less'
    })
  ]
};