async fetch()

in kit/svelteKitCustomClient/client.js [494:540]

• 34 lines of code
• 6 McCabe index (conditional complexity)

				async fetch(resource, init) {
					/** @type {URL | string} */
					let requested;

					if (resource instanceof Request) {
						requested = resource.url;

						// we're not allowed to modify the received `Request` object, so in order
						// to fixup relative urls we create a new equivalent `init` object instead
						init = {
							// the request body must be consumed in memory until browsers
							// implement streaming request bodies and/or the body getter
							body:
								resource.method === "GET" || resource.method === "HEAD"
									? undefined
									: await resource.blob(),
							cache: resource.cache,
							credentials: resource.credentials,
							headers: resource.headers,
							integrity: resource.integrity,
							keepalive: resource.keepalive,
							method: resource.method,
							mode: resource.mode,
							redirect: resource.redirect,
							referrer: resource.referrer,
							referrerPolicy: resource.referrerPolicy,
							signal: resource.signal,
							...init,
						};
					} else {
						requested = resource;
					}

					// we must fixup relative urls so they are resolved from the target page
					const resolved = new URL(requested, url);
					depends(resolved.href);

					// match ssr serialized data url, which is important to find cached responses
					if (resolved.origin === url.origin) {
						requested = resolved.href.slice(url.origin.length);
					}

					// prerendered pages may be served from any origin, so `initial_fetch` urls shouldn't be resolved
					return started
						? subsequent_fetch(requested, resolved.href, init)
						: initial_fetch(requested, init);
				},