What configuration options does the slugify function accept?

The slugify function accepts the following configuration options in an Options object:

1. separator (string, default: '-')

   • Specifies the character(s) to use between words in the slug [index.d.ts:L1-L30]
   • Example: slugify('BAR and baz', {separator: '_'}) produces 'bar_and_baz'

2. lowercase (boolean, default: true)

   • Controls whether the slug is converted to lowercase [index.d.ts:L1-L30]
   • Example: slugify('Déjà Vu!', {lowercase: false}) produces 'Deja-Vu'

3. decamelize (boolean, default: true)

   • Converts camelCase to separate words (e.g., fooBar → foo bar) [index.js:L51-L80]
   • Example: slugify('fooBar', {decamelize: false}) produces 'foobar'

4. customReplacements (array of string pairs, default: [['&', ' and '], ['🦄', ' unicorn '], ['♥', ' love ']])

   • Allows custom character/string replacements applied before other transformations [index.js:L51-L80]
   • Example: slugify('foo@unicorn', {customReplacements: [['@', ' at ']]}) produces 'foo-at-unicorn'

5. preserveLeadingUnderscore (boolean, default: false)

   • Preserves leading underscores if the string starts with one [index.js:L51-L80]

6. transliterate (boolean, default: true)

   • Controls whether transliteration is applied (for handling special characters in multiple languages) [index.js:L51-L80]

7. preserveCharacters (array, default: [])

   • Allows you to specify characters that should not be removed or replaced [index.js:L26-L55]

8. preserveTrailingDash (boolean, default: false)

   • Preserves trailing dashes if the string ends with one [index.js:L51-L80]

FOLLOW_UPS:

• How do custom replacements interact with transliteration?
• What happens with Unicode characters when transliteration is disabled?
• Can you preserve specific characters from being removed?