https://github.com/premailer/css_parser

Ruby CSS Parser
https://github.com/premailer/css_parser

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css-parser ruby

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mvc activerecord activejob crash-reporting nokogiri premailer mail inline rubygems rack

Last synced: about 6 hours ago
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Repository metadata

Ruby CSS Parser

Host: GitHub
URL: https://github.com/premailer/css_parser
Owner: premailer
License: other
Created: 2009-12-08T17:22:24.000Z (over 16 years ago)
Default Branch: master
Last Pushed: 2026-04-28T00:11:14.000Z (3 days ago)
Last Synced: 2026-04-28T01:02:07.606Z (3 days ago)
Topics: css-parser, ruby
Language: Ruby
Homepage:
Size: 658 KB
Stars: 289
Watchers: 9
Forks: 112
Open Issues: 24
Releases: 0
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: MIT-LICENSE

Ruby CSS Parser

Load, parse and cascade CSS rule sets in Ruby.

Setup

gem install css_parser

Usage

require 'css_parser'
include CssParser

parser = CssParser::Parser.new
parser.load_uri!('http://example.com/styles/style.css')

parser = CssParser::Parser.new
parser.load_uri!('file://home/user/styles/style.css')

# load a remote file, setting the base_uri and media_types
parser.load_uri!('../style.css', {base_uri: 'http://example.com/styles/inc/', media_types: [:screen, :handheld]})

# load a local file, setting the base_dir and media_types
parser.load_file!('print.css', '~/styles/', :print)

# load a string
parser = CssParser::Parser.new
parser.load_string! 'a { color: hotpink; }'

# lookup a rule by a selector
parser.find_by_selector('#content')
#=> 'font-size: 13px; line-height: 1.2;'

# lookup a rule by a selector and media type
parser.find_by_selector('#content', [:screen, :handheld])

# iterate through selectors by media type
parser.each_selector(:screen) do |selector, declarations, specificity|
  ...
end

# add a block of CSS
css = <<-EOT
  body { margin: 0 1em; }
EOT

parser.add_block!(css)

# output all CSS rules in a single stylesheet
parser.to_s
=> #content { font-size: 13px; line-height: 1.2; }
   body { margin: 0 1em; }

# capturing byte offsets within a file
parser.load_uri!('../style.css', {base_uri: 'http://example.com/styles/inc/', capture_offsets: true)
content_rule = parser.find_rule_sets(['#content']).first
content_rule.filename
#=> 'http://example.com/styles/styles.css'
content_rule.offset
#=> 10703..10752

# capturing byte offsets within a string
parser.load_string!('a { color: hotpink; }', {filename: 'index.html', capture_offsets: true)
content_rule = parser.find_rule_sets(['a']).first
content_rule.filename
#=> 'index.html'
content_rule.offset
#=> 0..21

Testing

bundle
bundle exec rake

Runs on Ruby 3.0/JRuby 9.4 or above.

Credits

By Alex Dunae (dunae.ca, e-mail 'code' at the same domain), 2007-11.

License: MIT

Thanks to all the wonderful contributors for their updates.

Made on Vancouver Island.

Owner metadata

Name: premailer
Login: premailer
Email:
Kind: organization
Description:
Website:
Location:
Twitter:
Company:
Icon url: https://avatars.githubusercontent.com/u/5750522?v=4
Repositories: 5
Last ynced at: 2024-04-21T03:04:42.616Z
Profile URL: https://github.com/premailer

GitHub Events

Total

Delete event: 1
Pull request event: 12
Fork event: 1
Issues event: 3
Watch event: 7
Issue comment event: 13
Push event: 12
Pull request review comment event: 4
Pull request review event: 8
Create event: 5

Last Year

Delete event: 1
Pull request event: 2
Issues event: 1
Watch event: 2
Issue comment event: 4
Push event: 3
Pull request review comment event: 3
Pull request review event: 4
Create event: 1

Committers metadata

Last synced: 1 day ago

Total Commits: 391
Total Committers: 71
Avg Commits per committer: 5.507
Development Distribution Score (DDS): 0.788

Commits in past year: 8
Committers in past year: 2
Avg Commits per committer in past year: 4.0
Development Distribution Score (DDS) in past year: 0.25

Name	Email	Commits
Alex Dunae	a**x@d**a	83
Michael Grosser	m**l@g**t	69
Akzhan Abdulin	a**n@g**m	54
Geremia Taglialatela	t**v@g**m	15
ojab	o**b@o**u	15
Alex Dunae	a**x@dx@d**a	13
Godwin	g**n@h**m	12
Tyler Cunnion	t**n@g**m	9
Nick Plante	n**p@z**g	7
Steven Daniels	s**8@g**m	6
Morten Primdahl	m**n@z**m	6
Simon	s**o@t**o	5
Dorian Marié	d**n@d**r	4
George	3****a	4
Mark Edmondson	m**n@g**m	4
martent	m**n@t**e	4
ju1ius	j**e@l**t	3
Tres Wong-Godfrey	t**s@c**o	3
Julien Kirch	c**e@a**t	3
Leonid Shevtsov	l**d@s**e	3
Matt Sanford	m**t@m**m	3
Paul Sokolik	s**k@s**m	2
Matthew Hicks	m**m@g**m	2
Kieran	k**r@k**o	2
Jonathan del Strother	me@d****m	2
Johnny Shields	j**s@g**m	2
Jason	m**l@j**k	2
J Smith	d**a@g**m	2
Anton Rieder	1****r	2
Andy Beckwith	a**h@z**m	2
and 41 more...

Committer domains:

Issue and Pull Request metadata

Last synced: 3 days ago

Total issues: 43
Total pull requests: 119
Average time to close issues: 10 months
Average time to close pull requests: 4 months
Total issue authors: 37
Total pull request authors: 61
Average comments per issue: 2.51
Average comments per pull request: 1.6
Merged pull request: 92
Bot issues: 0
Bot pull requests: 0

Past year issues: 3
Past year pull requests: 3
Past year average time to close issues: about 1 hour
Past year average time to close pull requests: 4 days
Past year issue authors: 2
Past year pull request authors: 3
Past year average comments per issue: 2.33
Past year average comments per pull request: 1.33
Past year merged pull request: 1
Past year bot issues: 0
Past year bot pull requests: 0

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/premailer/css_parser

Top Issue Authors

stoivo (3)
ojab (2)
sarken (2)
twe4ked (2)
tagliala (2)
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joevandyk (1)
marocas (1)
Mange (1)
mrueg (1)
getaaron (1)
devend711 (1)
jpbarbosa (1)

Top Pull Request Authors

tagliala (17)
stoivo (15)
ojab (8)
grosser (7)
leonid-shevtsov (6)
markedmondson (3)
reud (2)
mogest (2)
scouttyg (2)
george-gca (2)
jdelStrother (2)
davidwessman (2)
timcraft (2)
aried3r (2)
devend711 (1)

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Package metadata

Total packages: 14
Total downloads:
- rubygems: 337,151,940 total
Total docker downloads: 1,182,742,282
Total dependent packages: 93 (may contain duplicates)
Total dependent repositories: 8,621 (may contain duplicates)
Total versions: 176
Total maintainers: 4

gem.coop: css_parser

A set of classes for parsing CSS in Ruby.

Homepage: https://github.com/premailer/css_parser
Documentation: http://www.rubydoc.info/gems/css_parser/
Licenses: MIT
Latest release: 2.1.0 (published 3 days ago)
Last Synced: 2026-04-29T05:31:19.616Z (2 days ago)
Versions: 62
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 168,636,710 Total
Docker Downloads: 591,371,141
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 0.077%
- Downloads: 0.154%
- Docker downloads count: 0.155%
Maintainers (4)
- grosser
- akzhan
- primdahl
- alexdunae

rubygems.org: css_parser

A set of classes for parsing CSS in Ruby.

Homepage: https://github.com/premailer/css_parser
Documentation: http://www.rubydoc.info/gems/css_parser/
Licenses: MIT
Latest release: 2.1.0 (published 3 days ago)
Last Synced: 2026-04-28T00:18:54.206Z (3 days ago)
Versions: 62
Dependent Packages: 93
Dependent Repositories: 8,621
Downloads: 168,515,230 Total
Docker Downloads: 591,371,141
Rankings:
- Downloads: 0.158%
- Docker downloads count: 0.204%
- Dependent packages count: 0.34%
- Dependent repos count: 0.351%
- Average: 1.168%
- Forks count: 2.492%
- Stargazers count: 3.465%
Maintainers (4)
- grosser
- akzhan
- primdahl
- alexdunae

proxy.golang.org: github.com/premailer/css_parser

Homepage:
Documentation: https://pkg.go.dev/github.com/premailer/css_parser#section-documentation
Licenses: other
Latest release: v2.1.0+incompatible (published 3 days ago)
Last Synced: 2026-04-29T21:27:24.011Z (1 day ago)
Versions: 41
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Forks count: 2.498%
- Stargazers count: 3.275%
- Average: 6.538%
- Dependent packages count: 9.576%
- Dependent repos count: 10.802%

ubuntu-20.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses: other
Latest release: 1.6.0-1 (published 3 months ago)
Last Synced: 2026-03-13T13:25:14.731Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-10: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Documentation: https://packages.debian.org/buster/ruby-css-parser
Licenses:
Latest release: 1.6.0-1 (published 3 months ago)
Last Synced: 2026-03-13T16:07:52.883Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-23.10: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.6.0-2 (published 3 months ago)
Last Synced: 2026-03-14T02:17:02.016Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-23.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.6.0-2 (published 3 months ago)
Last Synced: 2026-03-12T01:19:02.724Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-24.10: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.16.0-1 (published 3 months ago)
Last Synced: 2026-03-09T17:04:05.769Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-11: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Documentation: https://packages.debian.org/bullseye/ruby-css-parser
Licenses:
Latest release: 1.6.0-1 (published 3 months ago)
Last Synced: 2026-03-14T06:21:52.754Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

guix: ruby-css-parser

Ruby Cascading Style Sheets (CSS) parser

Homepage: https://github.com/premailer/css_parser
Documentation: https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/ruby-xyz.scm#n1403
Licenses: expat
Latest release: 1.21.1 (published about 2 months ago)
Last Synced: 2026-04-27T16:18:59.347Z (4 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-13: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Documentation: https://packages.debian.org/trixie/ruby-css-parser
Licenses:
Latest release: 1.19.0-1 (published 3 months ago)
Last Synced: 2026-03-14T18:07:04.911Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-22.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.6.0-2 (published 3 months ago)
Last Synced: 2026-03-13T22:41:25.167Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-12: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Documentation: https://packages.debian.org/bookworm/ruby-css-parser
Licenses:
Latest release: 1.6.0-2 (published 3 months ago)
Last Synced: 2026-03-13T03:28:40.663Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-24.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.16.0-1 (published 3 months ago)
Last Synced: 2026-03-13T04:14:22.385Z (about 2 months ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

Dependencies

Gemfile.lock rubygems

addressable 2.8.0
ast 2.4.1
benchmark-ips 2.8.4
bump 0.10.0
css_parser 1.11.0
maxitest 3.6.0
memory_profiler 1.0.0
minitest 5.12.0
parallel 1.20.1
parser 3.0.0.0
public_suffix 4.0.6
rainbow 3.0.0
rake 13.0.3
regexp_parser 2.0.3
rexml 3.2.4
rubocop 1.8.0
rubocop-ast 1.4.0
rubocop-rake 0.5.1
ruby-progressbar 1.11.0
unicode-display_width 2.0.0
webrick 1.7.0

css_parser.gemspec rubygems

benchmark-ips >= 0 development
bump >= 0 development
maxitest >= 0 development
memory_profiler >= 0 development
rake >= 0 development
rubocop ~> 1.8 development
rubocop-rake >= 0 development
webrick >= 0 development
addressable >= 0

.github/workflows/ci.yml actions

actions/checkout v2 composite
ruby/setup-ruby v1 composite

Gemfile rubygems

Score: 31.150795805795248

https://github.com/premailer/css_parser

Keywords

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Repository metadata

README.md

Ruby CSS Parser

Setup

Usage

Testing

Credits

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Last Year

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Package metadata

gem.coop: css_parser

rubygems.org: css_parser

proxy.golang.org: github.com/premailer/css_parser

ubuntu-20.04: ruby-css-parser

debian-10: ruby-css-parser

ubuntu-23.10: ruby-css-parser

ubuntu-23.04: ruby-css-parser

ubuntu-24.10: ruby-css-parser

debian-11: ruby-css-parser

guix: ruby-css-parser

debian-13: ruby-css-parser

ubuntu-22.04: ruby-css-parser

debian-12: ruby-css-parser

ubuntu-24.04: ruby-css-parser

Dependencies