Function isHeaders

packages/core/src/fetch.ts:335–337

(headers: unknown)

}

function isHeaders(headers: unknown): headers is Headers {
  return typeof Headers !== 'undefined' && isInstanceOf(headers, Headers);
}

/** `HeadersInit` array form: each entry is a [name, value] pair of strings. */
function isHeadersInitTupleArray(headers: unknown): headers is [string, unknown][] {