The latest news releases from the Qwik team

Minor Changes

• ✨ our eslint plugin now supports eslint 9 (by @better-salmon in #7418)

Patch Changes

• ✨ Improve types and README documentation with clear configuration examples for ESLint 9+ (flat config). Added globalIgnores for more clarity and tseslint.config for better type inference inside the parserOptions option. (by @better-salmon in #7418)

Patch Changes

• 🐞🩹 create-qwik logAppCreated.ts now displays correct next steps for deno. (by @LogProphet in #7566)

  After using the create-qwik command, the logAppCreated.ts file was not displaying the correct next steps for deno. Prior to this fix it would display "deno start" instead of "deno task start". This would cause a failure to run, as deno requires the 'task' keyword. This fixes bug 7520

• 🐞🩹 linting errors which were previously being ignored across the monorepo. (by @better-salmon in #7418)

Minor Changes

• ✨ Major improvements to prefetching with automatic bundle preloading (by @wmertens in #7453)

  • This removes the need for service workers, and instead utilize modulepreload link tags for better browser integration.
  • Improves initial load performance by including dynamic imports in the prefetch
  • Reduces complexity while maintaining similar (and even better) functionality
  • Enables some preloading capabilities in dev mode (SSR result only)
  • Includes path-to-bundle mapping in bundle graph (this improves the experience using the <Link> component, AKA "single page app" mode)
  • Server now has built-in manifest support (so no need to pass manifest around)
  • Moves insights-related build code to insights plugin

  ⚠️ ATTENTION:

  • Keep your service worker code as is (either <ServiceWorkerRegister/> or <PrefetchServiceWorker/>).
  • Configure your server to provide long caching headers.

  Service Worker:

  This new implementation will use it to uninstall the current service worker to reduce the unnecessary duplication.

  The builtin service workers components are deprecated but still exist for backwards compatibility.

  ⚠️ IMPORTANT: Caching Headers:

  The files under build/ and assets/ are named with their content hash and may therefore be cached indefinitely. Typically you should serve build/* and assets/* with Cache-Control: public, max-age=31536000, immutable.

  However, if you changed the rollup configuration for output filenames, you will have to adjust the caching configuration accordingly.

  You can configure the preload behavior in your SSR configuration:

  // entry.ssr.ts
  export default function (opts: RenderToStreamOptions) {
    return renderToStream(<Root />, {
      preload: {
        // Enable debug logging for preload operations
        debug: true,
        // Maximum simultaneous preload links
        maxIdlePreloads: 5,
        // Minimum probability threshold for preloading
        preloadProbability: 0.25
        // ...and more, see the type JSDoc on hover
      },
      ...opts,
    });
  }
  

  Optional for legacy apps:

  For legacy apps that still need service worker functionality, you can add it back using:

  npm run qwik add service-worker
  

  This will add a basic service worker setup that you can customize for specific caching strategies, offline support, or other PWA features beyond just prefetching.

Patch Changes

• 🐞🩹 linting errors which were previously being ignored across the monorepo. (by @better-salmon in #7418)

• 🐞🩹 now qwikloader is loaded only once in all cases (by @wmertens in #7506)

Minor Changes

• 🐞🩹 qwik-city no longer forces q-data.json downloads, instead relying on the cache headers. This means that you have to make sure your q-data.json is served with Cache-Control headers that suit you. That file contains all the information about the route and is read for each qwik-city navigation. By default the data is cached for one hour. (by @wmertens in #7537)

• 🛠 the service workers have been deprecated and replaced with entries that unregister them. If you have it enabled in production, you can remove it after a while once you are sure all your users have the new version. (by @wmertens in #7453)

Patch Changes

• 🐞🩹 linting errors which were previously being ignored across the monorepo. (by @better-salmon in #7418)

• 🐞🩹 Link SPA subsequent navigation now properly prefetch the next routes. (by @maiieul in #7590)

• 🐞🩹 SPA Link now handle subsequent onQVisible$ passed as props. (by @maiieul in #7612)