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

Last synced: about 17 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 (about 16 years ago)
Default Branch: master
Last Pushed: 2026-02-23T22:01:22.000Z (8 days ago)
Last Synced: 2026-02-25T21:33:29.109Z (6 days ago)
Topics: css-parser, ruby
Language: Ruby
Homepage:
Size: 658 KB
Stars: 287
Watchers: 9
Forks: 111
Open Issues: 23
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: 2
Watch event: 7
Issue comment event: 12
Push event: 11
Pull request review comment event: 1
Pull request review event: 5
Create event: 5

Last Year

Delete event: 1
Pull request event: 6
Fork event: 1
Watch event: 2
Issue comment event: 4
Push event: 5
Pull request review event: 2
Create event: 2

Committers metadata

Last synced: about 20 hours ago

Total Commits: 389
Total Committers: 71
Avg Commits per committer: 5.479
Development Distribution Score (DDS): 0.787

Commits in past year: 9
Committers in past year: 4
Avg Commits per committer in past year: 2.25
Development Distribution Score (DDS) in past year: 0.444

Name	Email	Commits
Alex Dunae	a**x@d**a	83
Michael Grosser	m**l@g**t	67
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: 5 days ago

Total issues: 42
Total pull requests: 117
Average time to close issues: 10 months
Average time to close pull requests: 4 months
Total issue authors: 36
Total pull request authors: 60
Average comments per issue: 2.45
Average comments per pull request: 1.59
Merged pull request: 91
Bot issues: 0
Bot pull requests: 0

Past year issues: 2
Past year pull requests: 5
Past year average time to close issues: N/A
Past year average time to close pull requests: 2 days
Past year issue authors: 1
Past year pull request authors: 3
Past year average comments per issue: 1.0
Past year average comments per pull request: 0.2
Past year merged pull request: 4
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)
jonhyman (1)
jdelStrother (1)
joevandyk (1)
marocas (1)
Mange (1)
mrueg (1)
getaaron (1)
devend711 (1)
jpbarbosa (1)
mike-engel (1)

Top Pull Request Authors

tagliala (17)
stoivo (15)
ojab (8)
grosser (6)
leonid-shevtsov (6)
markedmondson (3)
mogest (2)
reud (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: 327,739,465 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: 173
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: 2.0.0 (published 8 days ago)
Last Synced: 2026-03-01T23:02:33.429Z (1 day ago)
Versions: 61
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 163,895,412 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: 2.0.0 (published 8 days ago)
Last Synced: 2026-02-27T22:30:33.209Z (4 days ago)
Versions: 61
Dependent Packages: 93
Dependent Repositories: 8,621
Downloads: 163,844,053 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: v2.0.0+incompatible (published 8 days ago)
Last Synced: 2026-02-28T21:01:11.416Z (3 days ago)
Versions: 40
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%

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 20 days ago)
Last Synced: 2026-02-13T04:20:04.164Z (18 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-20.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses: other
Latest release: 1.6.0-1 (published 18 days ago)
Last Synced: 2026-02-13T07:12:03.545Z (18 days 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 18 days ago)
Last Synced: 2026-02-13T18:17:35.445Z (18 days 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 20 days ago)
Last Synced: 2026-02-11T06:37:33.863Z (20 days 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 22 days ago)
Last Synced: 2026-02-09T16:22:51.688Z (22 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

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 21 days ago)
Last Synced: 2026-02-13T08:19:15.903Z (18 days 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#n1416
Licenses: expat
Latest release: 1.21.1 (published about 20 hours ago)
Last Synced: 2026-03-02T18:56:10.996Z (about 20 hours 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 19 days ago)
Last Synced: 2026-02-12T23:27:36.420Z (19 days 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 19 days ago)
Last Synced: 2026-02-13T01:02:08.889Z (19 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

ubuntu-22.04: ruby-css-parser

Homepage: https://github.com/premailer/css_parser
Licenses:
Latest release: 1.6.0-2 (published 18 days ago)
Last Synced: 2026-02-13T13:14:54.426Z (18 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 19 days ago)
Last Synced: 2026-02-13T13:14:28.046Z (18 days 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: 31.134952847163763

https://github.com/premailer/css_parser

Keywords

Keywords from Contributors

Repository metadata

README.md

Ruby CSS Parser

Setup

Usage

Testing

Credits

Owner metadata

GitHub Events

Total

Last Year

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Package metadata

gem.coop: css_parser

rubygems.org: css_parser

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

debian-10: ruby-css-parser

ubuntu-20.04: 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-12: ruby-css-parser

ubuntu-24.04: ruby-css-parser

ubuntu-22.04: ruby-css-parser

debian-13: ruby-css-parser

Dependencies