Registry / testing / rollup-plugin-es6-class-minify

rollup-plugin-es6-class-minify

library2.0.0jsnpmunverified

A Rollup plugin that minifies ES6 class member names (fields and methods) by renaming identifiers prefixed with underscore (`_`). Version 2.0.0 requires Node.js >=13. It works alongside standard JavaScript minifiers (like Terser) which cannot rename class properties. The plugin operates on the AST during bundling, replacing `_`-prefixed names with short alternatives. It supports repeated use across multiple bundles with consistent mappings by reusing the plugin instance. Input files must use underscore-prefixed class members for minification to apply.

testing

npm install rollup-plugin-es6-class-minify

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-ES6-

rollup-plugin-es6-class-minify

testingjavascriptv2.0.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

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

rollupPluginES6ClassMinify

✓ import { rollupPluginES6ClassMinify } from 'rollup-plugin-es6-class-minify'

✗ import rollupPluginES6ClassMinify from 'rollup-plugin-es6-class-minify'

The package exports a named function, not a default export. Using default import will result in undefined.

rollupPluginES6ClassMinify

✓ const { rollupPluginES6ClassMinify } = require('rollup-plugin-es6-class-minify')

✗ const rollupPluginES6ClassMinify = require('rollup-plugin-es6-class-minify')

CommonJS users must destructure the named export. Direct require returns an object with the function.

rollupPluginES6ClassMinify

✓ import { rollupPluginES6ClassMinify } from 'rollup-plugin-es6-class-minify'

✗ import { es6ClassMinify } from 'rollup-plugin-es6-class-minify'

The export name is exactly 'rollupPluginES6ClassMinify'. Using a different alias at import will fail.

Shows basic usage of the plugin with Rollup. Creates a plugin instance and adds it to the plugins array.

import { rollup } from 'rollup'; import { rollupPluginES6ClassMinify } from 'rollup-plugin-es6-class-minify'; const es6ClassMinify = rollupPluginES6ClassMinify(); rollup({ input: 'main.js', plugins: [es6ClassMinify] }).then(bundle => bundle.write({ format: 'es', dir: 'dist' })); console.log('Build complete. Class members prefixed with _ are minified.');

Debug

Known issues

gotchaOnly class members (fields/methods) prefixed with underscore (`_`) are minified. Members without underscore are left unchanged.

fix

Prefix all class fields and methods intended for minification with an underscore, e.g., `_count`, `_increment()`.

affects: >=0.0.0

gotchaThe plugin does NOT minify variable names, function names, or any code outside classes. It must be combined with a standard minifier (e.g., Terser) for full minification.

fix

Add another minifier plugin like `rollup-plugin-terser` after this plugin in the plugins array.

affects: >=0.0.0

gotchaIf the plugin instance is reused across multiple bundles, the mappings are shared, ensuring consistent short names across bundles. If you create separate instances, the same original name may get different short names in different bundles.

fix

To maintain cross-bundle consistency, reuse the same plugin instance (as shown in the docs).

affects: >=2.0.0

breakingVersion 2.0.0 drops support for Node.js 10 and 12 due to engine requirement `>=13`.

fix

Upgrade Node.js to version 13 or higher.

affects: >=2.0.0

Errors

Common errors & fixes

TypeError: Cannot read properties of undefined (reading 'map')

Using default import instead of named import from the package.

fix

Use import { rollupPluginES6ClassMinify } from 'rollup-plugin-es6-class-minify'

Error: [object Object] is not a function

Directly using the result of require without destructuring.

fix

const { rollupPluginES6ClassMinify } = require('rollup-plugin-es6-class-minify');

Unexpected token: punc (.)

Forgetting to add the plugin to the Rollup config or using unsupported JavaScript syntax.

fix

Ensure the plugin is included in the 'plugins' array and that your code uses underscore-prefixed class members.

Upgrade

Version history

2.0.0latest on npm

Audit

Dependencies

rolluprequiredThis package is a Rollup plugin and requires Rollup to be installed (peer dependency).

Agent activity

6 hits · last 30 days

node

Resources

githubssh://git@github.com/KristofJannes/rollup-plugin-es6-class-minify ↗

packagerollup-plugin-es6-class-minify ↗

homepagehttps://github.com/KristofJannes/rollup-plugin-es6-class-minify#readme ↗