Sourced from css-tree's releases.

3.2.1

• Fixed parsing of nested function in a group in definition syntax (#358)

3.2.0

• Added "sideEffects": false in package.json
• Added list option to the parse() method to specify whether the parser should produce a List (by default, list: true) or an array (list: false) for node's children (e.g., SelectorList, Block, etc.)
• Added support for Functional Notation in definition syntax (for now by wrapping function arguments into an implicit group when necessary, see #292)
• Added support for stacked multipliers {A}? and {A,B}? according to spec in definition syntax parsing (#346)
• Added math functions support in syntax matching (e.g., min(), max(), etc.) (#344)
• Added onToken option to the parse() method, which can be either an array or a function:
  • When the value is an array, it is populated with objects { type, start, end } (token type, and its start and end offsets).
  • When the value is a function, it accepts type, start, end, and index parameters, and is invoked with a token API as this, enabling advanced token handling (see onToken). For example, the following demonstrates checking if all block tokens have matching pairs:

    parse(css, {
        onToken(type, start, end, index) {
            if (this.isBlockOpenerTokenType(type)) {
                if (this.getBlockPairTokenIndex(index) === -1) {
                    console.warn('No closing pair for', this.getTokenValue(index), this.getRangeLocation(start, end));
                }
            } else if (this.isBlockCloserTokenType(type)) {
                if (this.getBlockPairTokenIndex(index) === -1) {
                    console.warn('No opening pair for', this.getTokenValue(index), this.getRangeLocation(start, end));
                }
            }
        }
    });
    

• Extended TokenStream with the following methods:
  • getTokenEnd(tokenIndex) – returns the token's end offset by index, complementing getTokenStart(tokenIndex)
  • getTokenType(tokenIndex) – returns the token's type by index
  • isBlockOpenerTokenType(tokenType) – returns true for <function-token>, <(-token>, <[-token>, and <{-token>
  • isBlockCloserTokenType(tokenType) – returns true for <)-token>, <]-token>, and <}-token>
  • getBlockTokenPairIndex(tokenIndex) – returns the index of the pair token for a block, or -1 if no pair exists
• Changed generate() to not auto insert whitespaces between tokens for raw values (#356)
• Fixed fork() to extend node definitions instead of overriding them. For example, fork({ node: { Dimension: { generate() { /* ... */ } } } }) will now update only the generate() method on the Dimension node, while inheriting all other properties from the previous syntax definition.
• Bumped mdn/data to 2.27.1 and various fixes in syntaxes

Sourced from css-tree's changelog.

3.2.1 (March 5, 2026)

• Fixed parsing of nested function in a group in definition syntax (#358)

3.2.0 (March 4, 2026)

• Added "sideEffects": false in package.json
• Added list option to the parse() method to specify whether the parser should produce a List (by default, list: true) or an array (list: false) for node's children (e.g., SelectorList, Block, etc.)
• Added support for Functional Notation in definition syntax (for now by wrapping function arguments into an implicit group when necessary, see #292)
• Added support for stacked multipliers {A}? and {A,B}? according to spec in definition syntax parsing (#346)
• Added math functions support in syntax matching (e.g., min(), max(), etc.) (#344)
• Added onToken option to the parse() method, which can be either an array or a function:
  • When the value is an array, it is populated with objects { type, start, end } (token type, and its start and end offsets).
  • When the value is a function, it accepts type, start, end, and index parameters, and is invoked with a token API as this, enabling advanced token handling (see onToken). For example, the following demonstrates checking if all block tokens have matching pairs:

    parse(css, {
        onToken(type, start, end, index) {
            if (this.isBlockOpenerTokenType(type)) {
                if (this.getBlockPairTokenIndex(index) === -1) {
                    console.warn('No closing pair for', this.getTokenValue(index), this.getRangeLocation(start, end));
                }
            } else if (this.isBlockCloserTokenType(type)) {
                if (this.getBlockPairTokenIndex(index) === -1) {
                    console.warn('No opening pair for', this.getTokenValue(index), this.getRangeLocation(start, end));
                }
            }
        }
    });
    

• Extended TokenStream with the following methods:
  • getTokenEnd(tokenIndex) – returns the token's end offset by index, complementing getTokenStart(tokenIndex)
  • getTokenType(tokenIndex) – returns the token's type by index
  • isBlockOpenerTokenType(tokenType) – returns true for <function-token>, <(-token>, <[-token>, and <{-token>
  • isBlockCloserTokenType(tokenType) – returns true for <)-token>, <]-token>, and <}-token>
  • getBlockTokenPairIndex(tokenIndex) – returns the index of the pair token for a block, or -1 if no pair exists
• Changed generate() to not auto insert whitespaces between tokens for raw values (#356)
• Fixed fork() to extend node definitions instead of overriding them. For example, fork({ node: { Dimension: { generate() { /* ... */ } } } }) will now update only the generate() method on the Dimension node, while inheriting all other properties from the previous syntax definition.
• Bumped mdn/data to 2.27.1 and various fixes in syntaxes

• 8a6caba 3.2.1
• 7c7f9ee Fix parsing of nested function in a group in definition syntax (fixes #358)
• c42fee2 3.2.0
• aad332e Add Function Notation in syntax definition (#292)
• 264d09d Fix GitHub actions
• 5766a65 Fix syntax definition issues
• 307d8df Bump deps
• c008c01 Add support for stacked multipliers {A}? and {A,B}? in definition syntax ...
• 20f5671 Add list option for parser (fixes #348)
• 39a0c72 Update nodejs versions
• Additional commits viewable in compare view

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