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09616-medium-parse-url-params
Medium
infer
string
template-literal

チャレンジのソース: type-challenges/09616-medium-parse-url-params

You're required to implement a type-level parser to parse URL params string into an Union.

ParseUrlParams<':id'> // id
ParseUrlParams<'posts/:id'> // id
ParseUrlParams<'posts/:id/:user'> // id | user

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テストケースの出典: type-challenges/09616-medium-parse-url-params/test-cases.ts
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<ParseUrlParams<''>, never>>,
  Expect<Equal<ParseUrlParams<':id'>, 'id'>>,
  Expect<Equal<ParseUrlParams<'posts/:id'>, 'id'>>,
  Expect<Equal<ParseUrlParams<'posts/:id/'>, 'id'>>,
  Expect<Equal<ParseUrlParams<'posts/:id/:user'>, 'id' | 'user'>>,
  Expect<Equal<ParseUrlParams<'posts/:id/:user/like'>, 'id' | 'user'>>,
]