Thorium Web is a web-based reader for EPUB and other digital publications, built using Next.js and modern web technologies. It is designed to provide a fast, responsive, and accessible reading experience.

• Supports EPUB
• Fast and responsive rendering of publications using Next.js
• Accessible design for readers with disabilities
• Customizable reading experience with themes, adjustable font sizes, line heights, word- and letter-spacing, etc.

There are two ways to get started with Thorium Web:

• Using the Next.JS App as is
• Using the Thorium Web package in your own project

You can take a look at the Implementers’ Guide for more details.

To get started with Thorium Web, follow these steps:

• Fork or clone the repository: git clone https://github.com/edrlab/thorium-web.git
• Install dependencies: pnpm install
• Start the development server: pnpm dev
• Open the reader in your web browser: http://localhost:3000

The development server will automatically reload the page when you make changes to the code.

To use Thorium Web in your own project, install the package and its peer dependencies:

npm install @edrlab/thorium-web @readium/css @readium/navigator @readium/navigator-html-injectables @readium/shared react-redux @reduxjs/toolkit motion react-aria react-aria-components react-stately react-modal-sheet react-resizable-panels 

Then you can import and use the components in your own code:

import { StatefulReader } from "@edrlab/thorium-web/epub"

const MyApp = () => {
  // ... fetch the manifest and get its self link href
  return (
    <StatefulReader
      rawManifest={ manifestObject }
      selfHref={ manifestSelfHref }
    />
  )
}

You can use the StatefulReader component to use the same exact Reader component as the one in the Next.JS App, but with your own plugins, store and preferences. Or you can use its components to build your own custom reader.

You can customize this project extensively through Preferences: breakpoints, which and how to display actions, themes provided to users, configuration of the docking system, sizes and offsets of icons, etc.

See Customization in docs for further details.

To build and deploy Thorium Web, run the following commands:

pnpm build
pnpm run deploy

This will create a production-ready build of the reader and deploy it to the specified hosting platform.

This repository is using the following configuration:

• Go-Toolkit on Google Cloud Run
• Thorium Web App on CloudFlare Pages
• Assets e.g. demo EPUBs stored on Google Cloud Storage

To deploy, the following script is run:

npx @cloudflare/next-on-pages && npx wrangler pages deploy

It’s running with defaults, which means a commit triggers a build and deploy for the current branch to preview. You can then access the app from a subdomain using this branch name.

More details in the @cloudflare/next-on-pages repo.

• Fullscreen is not available on iOS and very limited on iPadOS. We encountered so many issues on iPadOS that it has been disabled for the time being.
• on iPadOS, when the app is requested in its desktop version, some interventions are implemented in Safari to provide users with a “desktop-class experience.” Unfortunately, one of this intervention is impacting the font-size setting, and requires a flag to be toggled in the Preferences API in order to apply a patch. However, this patch may not catch all edge cases.

We welcome contributions to Thorium web! If you're interested in helping out, please fork this repository and submit a pull request with your changes.

Thorium Web is licensed under the BSD-3-Clause license.

Thorium Web is built using a number of open-source libraries and frameworks, including Readium, React, React Aria, and Material Symbols and Icons. We are grateful for the contributions of the developers and maintainers of these projects.