Any fetch-shaped function — the runtime global, a vendor mock, an
instrumented wrapper. The never[] parameters make every fetch signature
assignable (parameters are contravariant); the runtime contract is
(url: string, init?: object) => Promise<Response-shaped>.
Any fetch-shaped function — the runtime global, a vendor mock, an instrumented wrapper. The
never[]parameters make every fetch signature assignable (parameters are contravariant); the runtime contract is(url: string, init?: object) => Promise<Response-shaped>.