Changes to CSS Calc

3.2.1

May 13, 2026

• Update round(line-width, 1.2345px) to match the latest spec

3.2.0

April 12, 2026

• Add support for round(line-width, 1.2345px)
• Add devicePixelLength option

3.1.1

February 13, 2026

• Fix missing whitespace between components after solving calc expressions (e.g. calc(10px)calc(20px) now serializes as 10px 20px)

3.1.0

February 12, 2026

• Add onParseError option to calc().

3.0.1

February 10, 2026

• Fix source positions for generated functions and comma's. These now adopt the source position of surrounding nodes.

3.0.0

January 14, 2026

• Updated: Support for Node 20.19.0 or later (major).
• Removed: commonjs API. In supported Node versions require(esm) will work without needing to make code changes.
• Updated @csstools/css-tokenizer to 4.0.0 (major)
• Updated @csstools/css-parser-algorithms to 4.0.0 (major)

2.1.4

May 27, 2025

• Updated @csstools/css-tokenizer to 3.0.4 (patch)
• Updated @csstools/css-parser-algorithms to 3.0.5 (patch)

2.1.3

April 19, 2025

• Update random() to better handle floating point errors.
• Update random() to match the latest specification

2.1.2

February 23, 2025

• Update random() to correctly handle extremely large ranges or extremely tiny steps.

2.1.1

December 27, 2024

• Apply toCanonicalUnits to result containing NaN and Infinity

2.1.0

November 11, 2024

• Add support for random()

2.0.4

November 1, 2024

• Updated @csstools/css-tokenizer to 3.0.3 (patch)
• Updated @csstools/css-parser-algorithms to 3.0.4 (patch)

2.0.3

October 23, 2024

• Updated @csstools/css-parser-algorithms to 3.0.3 (patch)

2.0.2

October 10, 2024

• Updated @csstools/css-tokenizer to 3.0.2 (patch)
• Updated @csstools/css-parser-algorithms to 3.0.2 (patch)

2.0.1

August 18, 2024

• Add rawPercentages option to indicate that percentage values do not resolve against external values.
• Skip some calculations for values with percentages as those only have a known positive or negative value in a browser context.
• Updated @csstools/css-tokenizer to 3.0.1 (patch)
• Updated @csstools/css-parser-algorithms to 3.0.1 (patch)

2.0.0

August 3, 2024

• Updated: Support for Node v18+ (major).
• Updated @csstools/css-tokenizer to 3.0.0 (major)
• Updated @csstools/css-parser-algorithms to 3.0.0 (major)

1.2.4

July 6, 2024

• Updated @csstools/css-tokenizer to 2.4.1 (patch)
• Updated @csstools/css-parser-algorithms to 2.7.1 (patch)

1.2.3

June 29, 2024

• Updated @csstools/css-tokenizer to 2.3.2 (patch)
• Updated @csstools/css-parser-algorithms to 2.7.0 (minor)

1.2.2

May 4, 2024

• Updated @csstools/css-tokenizer to 2.3.1 (patch)
• Updated @csstools/css-parser-algorithms to 2.6.3 (patch)

1.2.1

May 4, 2024

• Allow uncapped precision in calc() serialization
• Add censorIntoStandardRepresentableValues conversion option
• Updated @csstools/css-tokenizer to 2.3.0 (minor)
• Updated @csstools/css-parser-algorithms to 2.6.2 (patch)

1.2.0

March 13, 2024

• Correctly serialize negative zero -0 values
• Add support for round() with only a single number argument
• Add support for none in clamp()
• Updated @csstools/css-tokenizer to 2.2.4 (patch)
• Updated @csstools/css-parser-algorithms to 2.6.1 (patch)

1.1.7

February 19, 2024

• Updated @csstools/css-parser-algorithms to 2.6.0 (minor)

1.1.6

December 31, 2023

• Updated @csstools/css-tokenizer to 2.2.3 (patch)
• Updated @csstools/css-parser-algorithms to 2.5.0 (minor)

1.1.5

December 15, 2023

• Fix type definitions
• Updated @csstools/css-tokenizer to 2.2.2 (patch)
• Updated @csstools/css-parser-algorithms to 2.4.0 (minor)

1.1.4

September 24, 2023

• Updated @csstools/css-tokenizer to 2.2.1 (patch)
• Updated @csstools/css-parser-algorithms to 2.3.2 (patch)

1.1.3

July 24, 2023

• Correctly serialize negative zero -0 values as calc(-1 * 0px)
• Updated @csstools/css-tokenizer to 2.2.0 (minor)
• Updated @csstools/css-parser-algorithms to 2.3.1 (patch)

1.1.2

July 3, 2023

• Updated @csstools/css-parser-algorithms to 2.3.0 (minor)

1.1.1

April 10, 2023

• Updated @csstools/css-tokenizer to 2.1.1 (patch)
• Updated @csstools/css-parser-algorithms to 2.1.1 (patch)

1.1.0

April 10, 2023

• Expose the list of supported math functions.

1.0.1

March 25, 2023

• Improve case insensitive string matching.

1.0.0

February 21, 2023

• Initial version