How to know the reading percentage of the book?

[leowucn]

I can get an epubcfi of current location, but how to know the reading percentage of the whole book? Is there any way to compute it ? Thanks.

[gerhardsletten]

@leowucn See first bullet in https://github.com/gerhardsletten/react-reader#limitations

EpubJS will need to render the current chapter before it will now how many pages it will have in the current viewport. Because of this it will not be able to tell you at which page in the whole epub-book you are at, nor will you be able to get the total pages for the whole book