KebabCase and SnakeCase insert additional delimiters when there is an Uppercase character after a WordSeparator
When a string has a WordSeparators character (e.g. '-', '_' or ' ') followed by an uppercase character, the resulting KebabCase & SnakeCase (and probably all DelimiterCase) type adds additional/duplicate delimiters, rather than a single delimiter
e.g:
const a: KebabCase<"Test string"> = "test-string" // Works, no TS error
const b: KebabCase<"Test String"> = "test-string" // Error, TS expects 'test--string'
sindresorhus / type-fest
A collection of essential TypeScript types
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