Web

On web, ReadiumView renders with Readium's TypeScript toolkit for EPUB and PDF.js for PDF, through React Native Web.

Serving publications

The web reader fetches a publication over HTTP instead of opening a file:

• EPUB: file.url is the URL of the unpacked EPUB's manifest.json, a Readium Web Publication Manifest. A streamer serves one from an .epub; this server is an example.
• PDF: file.url is the PDF's URL.

What differs from native

Feature	Web
Search	Not supported (capabilities.search is false)
Zoom	PDF only; onZoomChange reports the scale, including pinches
file.credentials, LCP	Not supported: LCP is native only

Use capabilities from onPublicationReady to adapt the UI rather than checking the platform.

Next.js

The Next.js example shows the setup: React Native Web, and transpilePackages for the library and its dependencies in next.config.js.