024.KebabCase

将 camelCase（小驼峰）或 PascalCase（大驼峰）字符串替换为 kebab-case

例如：

type FooBarBaz = KebabCase<"FooBarBaz">
const foobarbaz: FooBarBaz = "foo-bar-baz"
 
type DoNothing = KebabCase<"do-nothing">
const doNothing: DoNothing = "do-nothing"

答案

// 方法 1
type KebabCase<S extends string> = S extends `${infer L}${infer R}`
  ? R extends Uncapitalize<R>
    ? `${Lowercase<L>}${KebabCase<R>}`
    : `${Lowercase<L>}-${KebabCase<R>}`
  : ''
 
// 方法 2
type KebabCase<S extends string, Before extends string = ''> = S extends `${infer L}${infer R}`
  ? L extends Lowercase<L> // 除大写字母
    ? KebabCase<R, `${Before}${L}`>
    : Before extends ''
      ? KebabCase<R, Lowercase<L>>
      : KebabCase<R, `${Before}-${Lowercase<L>}`>
  : Before