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uglifyjs-folder

library3.3.0jsnpmunverified

A CLI tool that minifies all JavaScript files in a folder into a single output file using the terser minifier (v5.18.1). It supports configurable glob patterns, per-file minification, comment preservation, and custom output extensions. Current stable version is 3.3.0, released June 2023. Updated regularly to track terser releases. Key differentiator: batch processing of entire folders with flexible output options, unlike single-file minifiers.

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npm install uglifyjs-folder

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · UGLIFYJS-FOLDER

uglifyjs-folder

devopsjavascriptv3.3.0

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.

default

✓ import uglifyjsFolder from 'uglifyjs-folder';

✗ const uglifyjsFolder = require('uglifyjs-folder');

Main use is CLI; programmatic API is synchronous/async but not officially documented. ESM import works if package supports it.

uglifyjs-folder CLI

✓ npx uglifyjs-folder path/to/folder --output bundle.min.js

✗ uglifyjs-folder path --out bundle.js

Option flag is --output or -o, not --out. Also the package must be installed globally or via npx.

–log-level

✓ uglifyjs-folder src --log-level error

✗ uglifyjs-folder src --loglevel error

Double dash and hyphenated: --log-level, not --loglevel.

Shows installing the package globally, creating two JS test files, and minifying the folder into a single bundle file.

npm install -g uglifyjs-folder mkdir -p my-project cat > my-project/main.js << 'EOF' function hello() { return 'world'; } EOF cat > my-project/lib.js << 'EOF' const x = 5; EOF uglifyjs-folder my-project -o bundle.min.js cat bundle.min.js

Debug

Known issues

breakingAPI changed from synchronous to async/await in v3.0.0 (released 21/Jun/2021).

fix

If using programmatic API, update code to use async/await. The CLI interface unchanged.

affects: >=3.0.0

breakingDropped uglify-js and uglify-es in v2.0.0; now uses terser exclusively.

fix

Remove any calls to uglify-js specific options; terser is mostly compatible but check config file keys.

affects: >=2.0.0

deprecatedThe `--harmony` flag is no longer supported (removed when uglify-es was dropped).

fix

Remove --harmony from CLI commands; terser handles ES6+ by default.

affects: >=2.0.0

gotchaWhen using `--each` with `--extension .js` and same output folder, files may overwrite originals.

fix

Use a different output folder or extension (e.g., -x .min.js).

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'uglifyjs-folder'

Package is not installed globally or locally.

fix

Run `npm install -g uglifyjs-folder` to install globally, or `npm install --save-dev uglifyjs-folder` for local and use npx.

Command not found: uglifyjs-folder

Global installation not in PATH or not installed.

fix

Ensure npm global bin directory is in PATH, or use `npx uglifyjs-folder`.

TypeError: Cannot read property 'toUpperCase' of undefined

Missing or incorrect options argument (e.g., -o without value).

fix

Check CLI syntax: `uglifyjs-folder src -o output.min.js`.

Upgrade

Version history

3.3.0latest on npm

Audit

Dependencies

terserrequiredJavaScript minification engine (replaced uglify-js in v2.0.0)

Agent activity

4 hits · last 30 days

node

Resources

githubgit://github.com/mihai-vlc/uglifyjs-folder ↗

packageuglifyjs-folder ↗

homepagehttps://github.com/mihai-vlc/uglifyjs-folder ↗