Changelog

Unreleased

Changed

• CLI: Remove pico-args

0.15.0 - 2025-06-17

Changed

• Update cssparser to 0.35.
• Update html5ever to 0.31.
• Update selectors to 0.28.

0.14.5 - 2025-06-16

Performance

• Slightly improve performance of HTML serialization.
• Avoid creating unused caches.

0.14.4 - 2024-12-27

Changed

• Bump MSRV to 1.71.1.

0.14.3 - 2024-11-14

Fixed

• Prioritize !important rules when computing element styles. #398

0.14.2 - 2024-11-11

Changed

• Bump MSRV to 1.70.

Fixed

• Replace double quotes when merging styles. #392

0.14.1 - 2024-04-27

Fixed

• Precedence of element styles over other styles. #364

0.14.0 - 2024-04-01

Added

• External stylesheet caching. #314
• Inlining to HTML fragments. #335

Changed

• Update html5ever to 0.27.
• Update rayon to 1.10.

0.13.0 - 2024-01-19

Added

• A way to customize resolving remote stylesheets.
• Support for the data-css-inline="keep" attribute to enforce keeping the style tag.

Changed

• Replace attohttpc with reqwest to simplify implementing non-blocking stylesheet resolving in the future release.

Fixed

• Lookups for previous / next siblings, affecting selectors like nth-child. #324

Performance

• Avoid using binary search on attributes.

0.12.0 - 2023-12-28

Changed

• Display stylesheet location in network-related errors.
• Implement std::error::Error::source for InlineError.

Performance

• Optimize serialization of attributes and text nodes.

0.11.2 - 2023-12-09

Performance

• Avoid iterating over non-Element nodes.
• Reuse caches for nth index selectors.

0.11.1 - 2023-12-04

Changed

• Update indexmap to 2.1.
• Update cssparser to 0.31.2.
• Update selectors to 0.25.
• Bump MSRV to 1.65.

Fixed

• Replace double quotes in all property values.

Performance

• Avoid allocation when replacing double quotes in property values.

0.11.0 - 2023-09-26

Added

• The inline_style_tags option to control whether inlining from "style" tags should be performed. #253

Performance

• Reuse existing attributes when creating an element during parsing.

Changed

• Bump MSRV to 1.63.

0.10.5 - 2023-08-30

Performance

• Pre-allocate space during serialization.
• Optimized class attribute handling: up to 25% faster for extensive class-dependent selectors.
• Fast-path class check for shorter class attribute values.
• Use a Bloom filter to detect if an element has no given class.
• Avoid allocating a vector during selectors compilation.
• Use FxHasher in more cases.

Changed

• Drop usage of memchr.
• Bump MSRV to 1.62.1.

0.10.4 - 2023-08-12

Fixed

• Applying new styles only to the first matching tag during styles merging. #224

Performance

• Fix under-allocating storage for intermediate CSS styles.
• Perform CSS inlining as late as possible to avoid intermediate allocations. #220

0.10.3 - 2023-07-01

Performance

• Optimized HTML serialization for a performance boost of up to 25%.

0.10.2 - 2023-06-25

Changed

• Standardized the formatting of CSS declarations: now consistently using : separator between properties and values.

Performance

• Various performance improvements.

0.10.1 - 2023-06-18

Performance

• Use a simpler way for HTML tree traversal.
• Avoid hashing in some cases.

0.10.0 - 2023-06-16

Added

• keep_link_tags configuration option.

Changed

• Replace remove_style_tags with keep_style_tags.

Fixed

• SECURITY: Passing unescaped strings in attribute values introduced in #184. Previously, escaped values became unescaped on the serialization step.

Removed

• The inline_style_tags configuration option.

0.9.0 - 2023-06-10

Fixed

• Serialize all HTML attributes without escaping. #184

Internal

• Replaced the kuchiki crate with our custom-built HTML tree representation. #176

Performance

• 30-50% average performance improvement due switch to a custom-built HTML tree representation and serializer.

0.8.5 - 2022-11-10

Added

• --output-filename-prefix CLI option to control the output files prefix.
• Support for the file:// URI scheme in base_url. #171

Changed

• Return 1 exit code if any of the input files were not processed successfully via CLI.

0.8.4 - 2022-11-02

Added

• data-css-inline="ignore" attribute to ignore CSS inlining. #10

0.8.3 - 2022-10-20

Fixed

• Ignoring selectors' specificity when applying declarations from different qualified rules. #148

0.8.2 - 2022-07-21

Added

• New http & file features which give a way to disable resolving external stylesheets and reduce the compiled artifacts size.

Fixed

• !important rules not overriding inlined styles. #152

0.8.1 - 2022-04-01

Fixed

• Not respecting specificity in case of inlining overlapping rules like padding and padding-top. #142

Performance

• Pre-allocate more memory for output HTML to avoid resizing.

0.8.0 - 2022-01-09

Added

• Separate InlineError::MissingStyleSheet error variant to improve debugging experience. #124

0.7.6 - 2022-01-08

Fixed

• Invalid handling of double-quoted property values like in font-family: "Open Sans". #129

Performance

• Use std::fs::read_to_string in CLI to avoid over/under allocating of the input buffer.

0.7.5 - 2021-07-24

Fixed

• Panic on invalid URLs for remote stylesheets.

0.7.4 - 2021-07-06

Changed

• Update rayon to 1.5.

Performance

• Optimize loading of external files.

0.7.3 - 2021-06-24

Performance

• Avoid allocations in error formatting.

0.7.2 - 2021-06-22

Fixed

• Incorrect override of exiting style attribute values. #113

Performance

• Use specialized to_string implementation on &&str.
• Use ahash.

0.7.1 - 2021-06-10

Fixed

• Ignored style tags when the document contains multiple of them and the remove_style_tags: true config option is used. #110

0.7.0 - 2021-06-09

Fixed

• Ignored selectors specificity. #108

0.6.1 - 2020-12-07

Fixed

• Compatibility with the new cssparser crate version.

Performance

• Avoid string allocations during converting ParseError to InlineError.

0.6.0 - 2020-11-02

Changed

• Links to remote stylesheets are deduplicated now.

Fixed

• Wrong inlined file prefixes handling in CLI. #89

Performance

• Use Formatter.write_str instead of write! macro in the Display trait implementation for InlineError. #85
• Use Cow for error messages. #87

0.5.0 - 2020-08-07

Added

• CSSInliner::options() that implements the Builder pattern. #71

Changed

• Restrict visibility of items in parser.rs

Performance

• Avoid string allocation in get_full_url

0.4.0 - 2020-07-13

Added

• Option to disable processing of "style" tags. #45
• Option to inline additional CSS. #45

Changed

• Switch from openssl to rustls in attohttpc dependency. #49

Performance

• Use codegen-units=1 and lto=fat.
• Reduce the number of allocations in CLI.
• Avoid CLI output formatting when it is not needed.

0.3.3 - 2020-07-07

Performance

• Pre-allocate the output vector.
• Minor improvement for creating new files via CLI.
• Reduce the average number of allocations during styles merge by a factor of 5.5x.

0.3.2 - 2020-06-27

Changed

• Remove debug symbols from the release build

Performance

• Reduce the number of String allocations.
• Avoid BTreeMap::insert when style attribute already exists

0.3.1 - 2020-06-25

Changed

• Fix links in docs

0.3.0 - 2020-06-25

Added

• Command Line Interface. #33

0.2.0 - 2020-06-25

Added

• CSSInliner and customization options. #9
• Option to remove "style" tags (remove_style_tags). Disabled by default. #11
• CSSInliner::compact() constructor for producing smaller HTML output.
• CSSInliner.inline_to that writes the output to a generic writer. #24
• Implement Error for InlineError.
• Loading external stylesheets. #8
• Option to control whether remote stylesheets should be loaded (load_remote_stylesheets). Enabled by default.

Changed

• Improved error messages. #27
• Skip selectors that can't be parsed.

Fixed

• Ignore @media queries since they can not be inlined. #7
• Panic in cases when styles are applied to the currently processed "link" tags.

Performance

• Improve performance for merging new styles in existing "style" attributes.

0.1.0 - 2020-06-22

• Initial public release