rjsmin

library1.2.5pypypi✓ verified 28d ago

rJSmin is a javascript minifier written in Python, based on the semantics of jsmin.c by Douglas Crockford. It is a re-implementation aiming for speed, designed for runtime use rather than a preprocessing step, and usually produces the same results as the original `jsmin.c`. The current version is 1.2.5 and it supports Python 2.7 and 3.6+.

devops

pip install rjsmin

package ↗homepage ↗

INSTALL

IMPORT

SIG · RJSMIN

rjsmin

devopspythonv1.2.5

Install

1.6s avg

Import

—

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.2.5 · pip install

no network on importno background threads

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

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 17.9MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.6s · import 0.000s · 18MB

16MB installed

● package 16MB

Code

Verified usage

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

jsmin

✓ from rjsmin import jsmin

The `jsmin` function takes a string containing JavaScript code and returns its minified version as a string. An optional `keep_bang_comments` parameter allows preserving comments starting with an exclamation mark.

from rjsmin import jsmin js_code = """\ function hello( name ) { /* a comment */ return 'Hello, ' + name + '!'; } """ minified_code = jsmin(js_code) print(minified_code) # Expected output: function hello(name){return'Hello,'+name+'!'}

rjsmin --version

Debug

Known issues

gotcharJSmin performs no error detection. Unterminated string, regex, and comment literals are treated as regular JavaScript code and minified as such, which can lead to invalid output without explicit error messages.

fix

Ensure your JavaScript code is syntactically correct and well-formed before passing it to rjsmin. Use linters or validate the code beforehand.

affects: All versions

gotcharJSmin does not handle streams and requires the complete JavaScript code as a single string input. It cannot process code incrementally from a file stream.

fix

Read the entire JavaScript file content into a string before passing it to the `jsmin` function.

affects: All versions

gotchaWhile generally compatible with jsmin.c, rJSmin has subtle behavioral differences. For example, control characters in string/regex literals are untouched, newlines are generally disallowed in string/regex literals (except for ECMA-5 line continuations), and sequences like '+ +' or '- -' are not collapsed to '++' or '--'.

fix

Thoroughly test minified output if exact byte-for-byte compatibility or specific minification behaviors (beyond simple whitespace removal) with the original jsmin.c are critical for your application.

affects: All versions

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'rjsmin'

The rjsmin package is not installed in the current Python environment.

fix

pip install rjsmin

TypeError: module 'rjsmin' is not callable

The user is attempting to call the rjsmin module directly, rather than its primary minification function.

fix

rjsmin.jsmin(javascript_string)

TypeError: expected string or buffer, <class 'list'> found

The rjsmin.jsmin function expects the input JavaScript code to be a string or a file-like object, but received an unsupported type.

fix

rjsmin.jsmin("var some_js = 'value';")

Upgrade

Version history

1.2.5latest on PyPI · released Oct 12, 2025

Audit

Dependencies

No dependency data recorded yet.

Agent activity

3 hits · last 30 days

node

Resources

packagehttps://pypi.org/project/rjsmin/ ↗

homepagehttps://opensource.perlig.de/rjsmin/ ↗