_updateTotalPages()

[PaulHost]

Before _updateTotalPages() I can not do gotoPage().
book.generatePagination() method is very long,
it may be possible to somehow skip it while saving it somewhere?

[janpio]

What do you mean by "very long"? That it takes long to execute?

If I remember correctly, book.gotoPage() needs to have the book fully paginated, which happens via book.generatePagination().

You can check the epubjs code and repository if there might be a better way.

[PaulHost]

yes, thank you!

[PaulHost]

It can be implemented with the locations, but I don't understand how

[janpio]

What does locations refer to here?

I am not fully in this project any more, so it would be great if you could search for the code here and post a link to the specific line - or some documentation.

[PaulHost]

you use location only as event:

ionic-epubjs/src/pages/book/book.ts

Line 44 in db5aa52

this.book.on('book:pageChanged', (location) => {

this.book.on('book:pageChanged', (location) => { 
        console.log('on book:pageChanged', location);
        this._updateCurrentPage();
        this._updatePageTitle();
      });

it can somehow be used for quick opening from storage
https://github.com/futurepress/epub.js/blob/86ba893a29e5fef57f79b8ec4ff94a869d327324/examples/locations.html#L184

[janpio]

Thanks for the context.

So we listen to the book:pageChanged event which then gives a location parameter we can use and log.

I am not sure if we are using book.locations yet anywhere... the example there seems to be pretty new, right?