Function fetchPartials

packages/fresh/src/runtime/client/partials.ts:353–387

(
  actualUrl: URL,
  partialUrl: URL,
  shouldNavigate: boolean,
  init: RequestInit = {},
)

}

async function fetchPartials(
  actualUrl: URL,
  partialUrl: URL,
  shouldNavigate: boolean,
  init: RequestInit = {},
) {
  init.redirect = "follow";
  partialUrl = new URL(partialUrl);
  partialUrl.searchParams.set(PARTIAL_SEARCH_PARAM, "true");
  const res = await fetch(partialUrl, init);

  if (res.redirected) {
    const nextUrl = new URL(res.url);
    if (nextUrl.origin === actualUrl.origin) {
      actualUrl = nextUrl;
    }
  }
  actualUrl.searchParams.delete(PARTIAL_SEARCH_PARAM);

  try {
    await applyPartials(res);
  } catch (err) {
    // When a redirect leads to a page without partials, fall back
    // to a full page navigation instead of silently failing.
    if (err instanceof NoPartialsError && res.redirected) {
      location.href = actualUrl.href;
      return;
    }
    throw err;
  }

  if (shouldNavigate) {
    maybeReplaceHistory(actualUrl);
  }
}

interface PartialReviveCtx {
  foundPartials: number;