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csslib 0.16.1

Published Jul 8, 2019
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A Dart CSS parser.

Usage #

Parsing CSS is easy!

import 'package:csslib/parser.dart';

main() {
  var stylesheet = parse(
      '.foo { color: red; left: 20px; top: 20px; width: 100px; height:200px }');
  print(stylesheet.toDebugString());
}

You can pass a String or List<int> to parse.

0.16.1 #

  • Fixed a crash caused by parsing certain calc() expressions and variables names that contain numbers.

0.16.0 #

  • Removed support for the shadow-piercing comibnators /deep/ and >>>. These were dropped from the Shadow DOM specification.

0.15.0 #

  • BREAKING
    • Removed css executable from bin directory.
    • Removed the deprecated css.dart library.
    • Message.level is now of type MessageLevel defined in this package.
  • Removed dependencies on package:args and package:logging.
  • Require Dart SDK >=2.1.0.

0.14.6 #

  • Removed whitespace between comma-delimited expressions in compact output.

    Before:

    div{color:rgba(0, 0, 0, 0.5);}

    After:

    div{color:rgba(0,0,0,0.5);}

  • Removed last semicolon from declaration groups in compact output.

    Before:

    div{color:red;background:blue;}

    After:

    div{color:red;background:blue}

0.14.5 #

  • Fixed a crashed caused by parsing :host() without an argument and added an error message explaining that a selector argument is expected.

0.14.4+1 #

  • Set max SDK version to <3.0.0, and adjust other dependencies.

0.14.4 #

  • Reduced whitespace in compact output for the @page at-rule and margin boxes.
  • Updated SDK version to 2.0.0-dev.17.0.
  • Stop using deprecated constants.

0.14.3 #

  • Reduced the amount of whitespace in compact output around braces.

0.14.2 #

  • Fixed Dart 2 runtime failure.

0.14.1 #

  • Deprecated package:csslib/css.dart. Use parser.dart and visitor.dart instead.

0.14.0 #

New features #

  • Supports nested at-rules.
  • Supports nested HTML comments in CSS comments and vice-versa.

Breaking changes #

  • The List<RuleSet> rulesets field on MediaDirective, HostDirective, and StyletDirective has been replaced by List<TreeNode> rules to allow nested at-rules in addition to rulesets.

0.13.6 #

  • Adds support for @viewport.
  • Adds support for -webkit-calc() and -moz-calc().
  • Adds support for querying media features without specifying an expression. For example: @media (transform-3d) { ... }.
  • Prevents exception being thrown for invalid dimension terms, and instead issues an error.

0.13.5 #

  • Adds support for @-moz-document.
  • Adds support for @supports.

0.13.4 #

  • Parses CSS 2.1 pseudo-elements as pseudo-elements instead of pseudo-classes.
  • Supports signed decimal numbers with no integer part.
  • Fixes parsing hexadecimal numbers when followed by an identifier.
  • Fixes parsing strings which contain unicode-range character sequences.

0.13.3+1 #

  • Fixes analyzer error.

0.13.3 #

  • Adds support for shadow host selectors :host() and :host-context().
  • Adds support for shadow-piercing descendant combinator >>> and its alias /deep/ for backwards compatibility.
  • Adds support for non-functional IE filter properties (i.e. filter: FlipH).
  • Fixes emitted CSS for @page directive when body includes declarations and page-margin boxes.
  • Exports Message from parser.dart so it's no longer necessary to import src/messages.dart to use the parser API.

0.13.2+2 #

  • Fix static warnings.

0.13.2+1 #

  • Fix new strong mode error.

0.13.2 #

  • Relax type of TreeNode.visit, to allow returning values from visitors.

0.13.1 #

  • Fix two checked mode bugs introduced in 0.13.0.

0.13.0 #

  • BREAKING Fix all strong mode errors and warnings. This involved adding more precise on some public APIs, which is why it may break users.

0.12.2 #

  • Fix to handle calc functions however, the expressions are treated as a LiteralTerm and not fully parsed into the AST.

0.12.1 #

  • Fix to handling of escapes in strings.

0.12.0+1 #

  • Allow the lastest version of logging package.

0.12.0 #

  • Top-level methods in parser.dart now take PreprocessorOptions instead of List<String>.

  • PreprocessorOptions.inputFile is now final.

0.11.0+4 #

  • Cleanup some ambiguous and some incorrect type signatures.

0.11.0+3 #

  • Improve the speed and memory efficiency of parsing.

0.11.0+2 #

  • Fix another test that was failing on IE10.

0.11.0+1 #

  • Fix a test that was failing on IE10.

0.11.0 #

  • Switch from source_maps' Span class to source_span's SourceSpan class.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  csslib: ^0.16.1

2. Install it

You can install packages from the command line:

with pub:


$ pub get

with Flutter:


$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use: 


import 'package:csslib/parser.dart';
import 'package:csslib/visitor.dart';
Popularity:
Describes how popular the package is relative to other packages. [more]
99
Health:
Code health derived from static analysis. [more]
98
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
80
Overall:
Weighted score of the above. [more]
95
Learn more about scoring.

We analyzed this package on Apr 8, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6

Health suggestions

Fix lib/src/analyzer.dart. (-1.49 points)

Analysis of lib/src/analyzer.dart reported 3 hints:

line 496 col 18: The value of the field '_messages' isn't used.

line 825 col 8: The value of the field '_foundAndReplaced' isn't used.

line 940 col 18: The value of the field '_messages' isn't used.

Fix lib/parser.dart. (-1 points)

Analysis of lib/parser.dart reported 2 hints:

line 2618 col 9: DO use curly braces for all flow control structures.

line 2691 col 30: Prefer to use whereType on iterable.

Maintenance suggestions

The package description is too short. (-20 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.

Maintain an example.

None of the files in the package's example/ directory matches known example patterns.

Common filename patterns include main.dart, example.dart, and csslib.dart. Packages with multiple examples should provide example/README.md.

For more information see the pub package layout conventions.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
source_span ^1.4.0 1.7.0
Transitive dependencies
charcode 1.1.3
collection 1.14.12
meta 1.1.8
path 1.6.4
term_glyph 1.1.0
Dev dependencies
pedantic ^1.0.0
test ^1.2.0