Function refresh

src/framework/router.js:44–56

(response)

  }

  function refresh(response) {
    startTransition(() => {
      const nextCache = new Map();
      if (response != null) {
        const locationKey = response.headers.get('X-Location');
        const nextLocation = JSON.parse(locationKey);
        const nextContent = createFromReadableStream(response.body);
        nextCache.set(locationKey, nextContent);
        navigate(nextLocation);
      }
      setCache(nextCache);
    })
  }

  function navigate(nextLocation) {
    startTransition(() => {