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# JS Beautifier  [](https://pypi.python.org/pypi/jsbeautifier) [](https://cdnjs.com/libraries/js-beautify) [](https://www.npmjs.com/package/js-beautify) [](https://www.npmjs.com/package/js-beautify?activeTab=versions) [](https://gitter.im/beautify-web/js-beautify?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [](https://twitter.com/intent/user?screen_name=js_beautifier) [](https://www.npmjs.org/package/js-beautify) [](https://greenkeeper.io/) This little beautifier will reformat and re-indent bookmarklets, ugly JavaScript, unpack scripts packed by Dean Edward’s popular packer, as well as partly deobfuscate scripts processed by the npm package [javascript-obfuscator](https://github.com/javascript-obfuscator/javascript-obfuscator). Open [beautifier.io](https://beautifier.io/) to try it out. Options are available via the UI. # Contributors Needed I'm putting this front and center above because existing owners have very limited time to work on this project currently. This is a popular project and widely used but it desperately needs contributors who have time to commit to fixing both customer facing bugs and underlying problems with the internal design and implementation. If you are interested, please take a look at the [CONTRIBUTING.md](https://github.com/beautify-web/js-beautify/blob/main/CONTRIBUTING.md) then fix an issue marked with the ["Good first issue"](https://github.com/beautify-web/js-beautify/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) label and submit a PR. Repeat as often as possible. Thanks! # Installation You can install the beautifier for node.js or python. ## Node.js JavaScript You may install the NPM package `js-beautify`. When installed globally, it provides an executable `js-beautify` script. As with the Python script, the beautified result is sent to `stdout` unless otherwise configured. ```bash $ npm -g install js-beautify $ js-beautify foo.js ``` You can also use `js-beautify` as a `node` library (install locally, the `npm` default): ```bash $ npm install js-beautify ``` ## Node.js JavaScript (vNext) The above install the latest stable release. To install beta or RC versions: ```bash $ npm install js-beautify@next ``` ## Web Library The beautifier can be added on your page as web library. JS Beautifier is hosted on two CDN services: [cdnjs](https://cdnjs.com/libraries/js-beautify) and rawgit. To pull the latest version from one of these services include one set of the script tags below in your document: ```html <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify-css.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify-html.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify-css.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify-html.min.js"></script> <script src="https://cdn.rawgit.com/beautify-web/js-beautify/v1.13.5/js/lib/beautify.js"></script> <script src="https://cdn.rawgit.com/beautify-web/js-beautify/v1.13.5/js/lib/beautify-css.js"></script> <script src="https://cdn.rawgit.com/beautify-web/js-beautify/v1.13.5/js/lib/beautify-html.js"></script> ``` Older versions are available by changing the version number. Disclaimer: These are free services, so there are [no uptime or support guarantees](https://github.com/rgrove/rawgit/wiki/Frequently-Asked-Questions#i-need-guaranteed-100-uptime-should-i-use-cdnrawgitcom). ## Python To install the Python version of the beautifier: ```bash $ pip install jsbeautifier ``` Unlike the JavaScript version, the Python version can only reformat JavaScript. It does not work against HTML or CSS files, but you can install _css-beautify_ for CSS: ```bash $ pip install cssbeautifier ``` # Usage You can beautify javascript using JS Beautifier in your web browser, or on the command-line using node.js or python. ## Web Browser Open [beautifier.io](https://beautifier.io/). Options are available via the UI. ## Web Library The script tags above expose three functions: `js_beautify`, `css_beautify`, and `html_beautify`. ## Node.js JavaScript When installed globally, the beautifier provides an executable `js-beautify` script. The beautified result is sent to `stdout` unless otherwise configured. ```bash $ js-beautify foo.js ``` To use `js-beautify` as a `node` library (after install locally), import and call the appropriate beautifier method for javascript (js), css, or html. All three method signatures are `beautify(code, options)`. `code` is the string of code to be beautified. options is an object with the settings you would like used to beautify the code. The configuration option names are the same as the CLI names but with underscores instead of dashes. For example, `--indent-size 2 --space-in-empty-paren` would be `{ indent_size: 2, space_in_empty_paren: true }`. ```js var beautify = require('js-beautify').js, fs = require('fs'); fs.readFile('foo.js', 'utf8', function (err, data) { if (err) { throw err; } console.log(beautify(data, { indent_size: 2, space_in_empty_paren: true })); }); ``` ## Python After installing, to beautify using Python: ```bash $ js-beautify file.js ``` Beautified output goes to `stdout` by default. To use `jsbeautifier` as a library is simple: ```python import jsbeautifier res = jsbeautifier.beautify('your javascript string') res = jsbeautifier.beautify_file('some_file.js') ``` ...or, to specify some options: ```python opts = jsbeautifier.default_options() opts.indent_size = 2 opts.space_in_empty_paren = True res = jsbeautifier.beautify('some javascript', opts) ``` The configuration option names are the same as the CLI names but with underscores instead of dashes. The example above would be set on the command-line as `--indent-size 2 --space-in-empty-paren`. # Options These are the command-line flags for both Python and JS scripts: ```text CLI Options: -f, --file Input file(s) (Pass '-' for stdin) -r, --replace Write output in-place, replacing input -o, --outfile Write output to file (default stdout) --config Path to config file --type [js|css|html] ["js"] Select beautifier type (NOTE: Does *not* filter files, only defines which beautifier type to run) -q, --quiet Suppress logging to stdout -h, --help Show this help -v, --version Show the version Beautifier Options: -s, --indent-size Indentation size [4] -c, --indent-char Indentation character [" "] -t, --indent-with-tabs Indent with tabs, overrides -s and -c -e, --eol Character(s) to use as line terminators. [first newline in file, otherwise "\n] -n, --end-with-newline End output with newline --editorconfig Use EditorConfig to set up the options -l, --indent-level Initial indentation level [0] -p, --preserve-newlines Preserve line-breaks (--no-preserv