• Series fileAs
• Improve cover image detection
• Description as back-of-the-book quote

• Next page: right arrow
• Previous page: left arrow
• Close book: escape

Maybe:

• Next chapter: down arrow
• Previous chapter: up arrow

Build main navigation items from e-books currently in the database.

• Authors
• Series
• Genres
• Read Status
• Shelves

Loading a book into the reader can take a couple of seconds, mostly because locations are generated every time a new book is opened. There should be some kind of UI element indicating that work is done while users wait for the book to finish loading.

As a long term solution, book locations should definitely be cached, probably in local storage on the client side.

epub30-spec.zip

Some table of contents entries fail to navigate to the specified position in the book. Clicking on them produces a No Section Found error.

Stack trace:

epub.min.js:formatted:5124 Uncaught (in promise) Error: No Section Found
    at b._display (epub.min.js:formatted:5124)
    at e.a.dequeue (epub.min.js:formatted:2541)
    at epub.min.js:formatted:2558
_display @ epub.min.js:formatted:5124
dequeue @ epub.min.js:formatted:2541
(anonymous) @ epub.min.js:formatted:2558
Promise.then (async)
dequeue @ epub.min.js:formatted:2541
(anonymous) @ epub.min.js:formatted:2558
requestAnimationFrame (async)
run @ epub.min.js:formatted:2557
enqueue @ epub.min.js:formatted:2535
display @ epub.min.js:formatted:5106
toSection @ app.js:1

Another problem is that TOC entries are not always highlighted even though they should be. Seems to be linked to url fragments.

An example file is attached.

• Fix section not found error
• Fix TOC highlighting
• Fix wrong TOC highlight when at beginning of section that contains subsections
• Handle files that are listed in the spine but not in the nav document

Embed the table of contents in the app's sidebar.

The code is completely untested right now. That needs to change. Unit testing needs to be set up for PHP and JavaScript independently.

• PHP
• JS

Allow users to change the font size of books. Store the value in a cookie or local storage in order to allow having different values for different devices at the same time.

AJAX response messages are logged to console, but never shown in the UI. Implement a UI element that displays messages to the user and takes care of timeouts and stuff.

The slider at the bottom of the reader view should provide navigation functionality. The view should be updated live, but with a delay for performance reason.

• Scrub to specified place by using the slider
• Display chapter markers on slider
• Snap to chapter markers (Optional)

Snapping to section markers might not be optimal, because it makes it harder to precisely hit pages near those markers.