jsmin is a Python library and command-line tool for minifying JavaScript code, based on Douglas Crockford's original jsmin.c. It removes unnecessary whitespace and comments to reduce file size. The current version is 3.0.1. The project is actively maintained, though the maintainer has stated they do not intend to add ECMAScript 6 (ES6) compatibility, indicating a focused maintenance cadence for its existing feature set.
pip install jsminVerified import paths — ran on the pinned version, not inferred.
Minify a JavaScript string directly, or read from a file, process, and print the minified output. The primary function `jsmin()` takes a string of JavaScript code and returns the minified version.
Upgrade to Python 3 or pin `jsmin` to version `2.2.2` for Python 2 projects: `pip install 'jsmin==2.2.2'`.
Ensure your JavaScript input is compatible with older ECMAScript standards (ES5-ish) or consider alternative minifiers for ES6+ code. For specific cases like template literals or certain quoted strings, the `quote_chars` parameter might offer limited help: `jsmin(code, quote_chars="'\"`")`.
Always validate your JavaScript code using a linter or by running it in an environment (like a browser or Node.js) before feeding it to `jsmin`.
Be aware of this behavior when expecting all comments to be removed. Use `/*!` for comments you wish to retain (e.g., copyright notices).
Install the package using pip: `pip install jsmin`
Correct the syntax errors in your JavaScript file, specifically ensuring all comments, string literals, and regular expression literals are properly terminated. For example, close `/*` with `*/`, ensure strings have matching quotes, and regexes have closing `/`.
Ensure the input JavaScript adheres to older ECMAScript standards (pre-ES6) or consider using a different minifier that supports modern JavaScript. If some ES6 features are used, experimenting with the `quote_chars="'` parameter might help in very specific cases, but full ES6 compatibility is not guaranteed.
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