offline-first-sw VS next-pwa

next-pwa helps convert your Next.js application into a Progressive Web App (PWA) with offline support.

/** @type {import('next').NextConfig} */ const path = require("path"); const isDev = process.env.NODE_ENV !== "production"; const withPWA = require("next-pwa")({ dest: "public", disable: isDev, buildExcludes: ["app-build-manifest.json"], }); const generateAppDirEntry = (entry) => { const packagePath = require.resolve("next-pwa"); const packageDirectory = path.dirname(packagePath); const registerJs = path.join(packageDirectory, "register.js"); return entry().then((entries) => { // Register SW on App directory, solution: https://github.com/shadowwalker/next-pwa/pull/427 if (entries["main-app"] && !entries["main-app"].includes(registerJs)) { if (Array.isArray(entries["main-app"])) { entries["main-app"].unshift(registerJs); } else if (typeof entries["main-app"] === "string") { entries["main-app"] = [registerJs, entries["main-app"]]; } } return entries; }); }; const nextConfig = { experimental: { appDir: true, }, reactStrictMode: true, webpack(config) { if( !isDev ){ const entry = generateAppDirEntry(config.entry); config.entry = () => entry; } return config; }, }; module.exports = withPWA(nextConfig);

Thank you for trying it and asking questions. Let me reply to them below.

> Could you give a brief overview of how the project is built, or what libraries are used? I found two in the source, React and Workbox. I've never heard of Workbox before, and I'm still figuring out how service workers are used. But it seems like a big part of the source.

For building, I used Next.js with static generation, not using Server-side rendering. But it's not an important part because it doesn't rely on Next.js features so much.

About Workbox, the app uses them with next-pwa (https://github.com/shadowwalker/next-pwa) for providing caching strategies and offline behavior as Progressive Web App. For example, the app registers several precached files via Workbox. Precached files are fetched and cached by the service worker and these caches can be used while offline. Also, Workbox can configure runtime caching strategies. You can see details in Workbox documentation (https://developer.chrome.com/docs/workbox/).

The app also uses the Service Worker to connect IndexedDB as a local database and send HTTP requests to synchronize data with Google Drive. By using the Service Worker, these methods don't block the user interaction from the main thread and Service Worker can run in the background to synchronize data even if the browser window is suddenly closed.

We tried to use next-offline and next-pwa, but we were only able to precache the static assets.

It's possible that next-pwa might support precaching pages in the future. Subscribe to issue 252 to keep up to date on that.

I am currently using the opt-in integration for the CRA pwa. I kind of wanted to test out migrating to Next. I know NextJs has a pwa plugin. Does anyone have any experience migrating with this in mind (from cra to next)?

There's next-offline and next-pwa (and some comparison too). But has anyone here made a PWA with NextJS? Now I am not only referring to service workers/offline functionality, but also icons, adding to homescreen, manifest, and other PWA features. Does anyone have any good examples or guides to refer to?

next-pwa, for PWA support.

shadowwalker/next-pwa#132 improves error messages