Get url params

get_url_params.ts

type GetParams<
  Text extends string,
  Result extends string = ''
> =
  Text extends `${ infer L }${ infer R }`
    ? L extends '/'
      ? Result
      : GetParams<R, `${ Result }${ L }`>
    : Result

type GetURLParams<URL extends string, Params = {}, > =
  URL extends `${ infer L }${ infer R }`
    ? L extends ':'
      ? GetURLParams<R, { [p in GetParams<R>]: string } & Params>
      : GetURLParams<R, Params>
    : Params

let url: GetURLParams<'/:id/:d2/'> = {d2: '', id: ''}

let url: GetURLParams<'/:other/:d2/'>