graphql-post.js

workbox.routing.registerRoute(
  /graphql$/,
  ({ url, event }) => {
    let request = event.request.clone();

    return fetch(event.request).then(response => {
      let respClone = response.clone();
      respClone.json().then(response => {
        syncResultsFor({ request, response }, "Book", bookSyncTransform);
        syncResultsFor({ request, response }, "Tag");
      });
      return response;
    });
  },
  "POST"
);