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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[4.0.0] - 2026-06-03

Added

  • Add async expand and compile exports under expand-value/async for resolving promise-backed values.
  • Add a resolve option for customizing value resolution during property access.
  • Add support for nested computed bracket expressions such as themes[config[setting]].background.
  • Add subpath exports for source modules, node classes, and async helpers.
  • Add async examples and test coverage for nested promise resolution.

Changed

  • Update build output to include all TypeScript source entries.
  • Update the test suite to use tsx with *.test.ts files.
  • Replace the legacy ESLint configuration with a flat ESLint config.
  • Tighten internal TypeScript types by replacing broad any usage with unknown.

Fixed

  • Resolve values consistently when accessing identifiers, quoted keys, symbols, numbers, ranges, and direct paths.
  • Normalize expression node names for number and binary expression parsing.

[3.0.0] - 2025-12-15

Added

  • Implement bracket-notation support for nested value retrieval in src/expression.ts.
  • Update src/compile.ts to integrate changes for enhanced expression parsing.
  • Add corresponding tests in test/expand-value.ts to cover new features.

[2.0.0] - 2025-07-16

Added

  • TypeScript support with full type definitions
  • Symbol data type support with Symbol.for() parsing
  • Number data type support including special values (NaN, Infinity, -Infinity, -0)
  • Bracket notation property access ([property]) optimization
  • Negative array index support
  • Advanced string segmentation using Intl.Segmenter
  • Enhanced error handling and validation
  • Security improvements with isSafeKey validation

Changed

  • Helper function improvements for better null/undefined handling
  • Enhanced Unicode support with grapheme cluster handling for strings
  • Enhanced size helper to return 1 for null values
  • Improved regular expressions for better parsing accuracy
  • Enhanced method detection regex for bracket notation
  • Better escape sequence handling in string parsing
  • Optimized property access with direct bracket notation support
  • Improved helper function resolution and context management

Fixed

  • Prototype pollution prevention with __proto__, constructor, and prototype key filtering
  • Proper handling of escaped characters in identifiers
  • Better Unicode character boundary detection
  • Improved error messages for undefined variables
  • Enhanced validation for object property access
  • Fixed context preservation for nested function calls