Registry / web-framework / rollup-plugin-less2

rollup-plugin-less2

library3.0.1jsnpmunverified

Rollup plugin to compile Less files to CSS, with optional CSS modules support via less-plugin-css-modules. Current stable version is 3.0.1, last updated in 2019; no recent releases. It integrates Less preprocessing into Rollup builds, handling includes/excludes, sourcemaps, and custom output. Different from rollup-plugin-less (v1) by supporting CSS modules and offering more output flexibility. Node >=4 required; primarily used for legacy projects still on Rollup 1.x.

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npm install rollup-plugin-less2

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-LESS

rollup-plugin-less2

web-frameworkjavascriptv3.0.1

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 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

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

default

✓ import RollupPluginLess2 from 'rollup-plugin-less2';

✗ const RollupPluginLess2 = require('rollup-plugin-less2');

ESM default export. CJS require works in Node but TypeScript may require esModuleInterop.

Basic Rollup config with Less preprocessing and CSS modules.

import RollupPluginLess2 from 'rollup-plugin-less2'; import LessPluginCssModules from 'less-plugin-css-modules'; export default { input: 'src/index.js', output: { file: 'dist/bundle.js', format: 'iife' }, plugins: [ RollupPluginLess2({ output: false, cssModules: true, options: { plugins: [ new LessPluginCssModules({ mode: 'local', hashPrefix: 'test', generateScopedName: '[local]___[hash:base64:5]' }) ] } }) ] };

Debug

Known issues

breakingVersion 2.x to 3.0 changed default export name from 'less' to 'rollup-plugin-less2'.

fix

Use import RollupPluginLess2 from 'rollup-plugin-less2' instead of import less from 'rollup-plugin-less2'.

affects: >=3.0.0

deprecatedPackage last updated in 2019; no support for Rollup 2.x or 3.x.

fix

Consider using rollup-plugin-postcss or @rollup/plugin-legacy for newer Rollup versions.

affects: >=3.0.0

gotchaWhen cssModules: true, you must also provide less-plugin-css-modules as a dependency.

fix

Install less-plugin-css-modules and pass it in options.plugins.

affects: >=3.0.0

gotchaoutput option can be false, string, or function; if false, CSS is emitted as a file via Rollup's output.

fix

Set output to a filename string to write to that path, or a function for custom handling.

affects: >=3.0.0

Errors

Common errors & fixes

TypeError: RollupPluginLess2 is not a function

Using CJS require without default export handling.

fix

Use import RollupPluginLess2 from 'rollup-plugin-less2' or const { default: RollupPluginLess2 } = require('rollup-plugin-less2');

Error: Cannot find module 'less-plugin-css-modules'

Package required when cssModules: true but not installed.

fix

Run npm install less-plugin-css-modules --save-dev

Error: .less files not processed (no output)

Missing include pattern or plugin order issue.

fix

Ensure include option covers your Less files, e.g., include: ['src/**/*.less']

Upgrade

Version history

3.0.1latest on npm

Audit

Dependencies

lessrequiredpeer dependency for compiling Less files

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/Katochimoto/rollup-plugin-less2 ↗

packagehttps://www.npmjs.com/package/rollup-plugin-less2 ↗