Extract regex patterns to constants for better maintainability

[bartveneman]

Summary

Refactored regex patterns used throughout the formatting logic into named constants defined at the module level. This improves code maintainability, readability, and performance by avoiding repeated regex literal creation.

Key Changes

• Extracted 15 regex patterns into module-level constants with descriptive names:

  • UNQUOTE_RE - removes quotes from string boundaries
  • DATA_URL_RE - detects data URLs
  • FONT_SLASH_RE - matches whitespace around forward slashes in font declarations
  • ATRULE_COLON_COMMA_RE - matches colons and commas in at-rules
  • ATRULE_PAREN_TEXT_RE - matches closing parenthesis followed by text
  • ATRULE_KEYWORD_PAREN_RE - matches media/supports keywords before parentheses
  • ATRULE_ARROW_COMPARE_RE - matches comparison operators (=>, >=, <=)
  • ATRULE_COMPARE_RE - matches unspaced comparison operators
  • ATRULE_COMPARE_SPACED_RE - matches comparison operators with surrounding whitespace
  • ATRULE_WHITESPACE_RE - matches multiple whitespace characters
  • ATRULE_COLON_COMMA_SPACE_RE - matches colons/commas followed by space
  • ATRULE_CALC_RE - matches calc() function expressions
  • ATRULE_FN_NAME_RE - matches function names to be lowercased

• Updated all replaceAll() calls in unquote(), print_url(), format_declaration(), and format_atrule_prelude() to use the new constants instead of inline regex literals

Benefits

• Improved code readability with self-documenting constant names
• Better performance by compiling regex patterns once at module load time
• Easier to maintain and update regex patterns in a centralized location
• Reduced code duplication

https://claude.ai/code/session_015ghHBJsYCroWnc3eMioBsy

[codecov]

Bundle Report

Changes will increase total bundle size by 593 bytes (3.28%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
formatCss-esm	15.91kB	593 bytes (3.87%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: formatCss-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.js	593 bytes	14.24kB	4.35%

Files in index.js:

• ./src/lib/index.ts → Total Size: 13.73kB

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.07%. Comparing base (f0ede7e) to head (64f4006).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #224      +/-   ##
==========================================
+ Coverage   96.98%   97.07%   +0.08%     
==========================================
  Files           2        2              
  Lines         365      376      +11     
  Branches      136      136              
==========================================
+ Hits          354      365      +11     
  Misses         10       10              
  Partials        1        1              

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