Is there a way to get contents of the epub without rendering it first?

[alexjyong]

I noticed that when you access book.spineItems[n].contents, or something like that it's only available after the book has been rendered.

Is there a way to access the epub text without rendering the document first?

Currently I use this to get all text in a given book:

// Initialize the book with the path to the .epub file
var book = ePub("myEpub.epub");

// Array to store the text contents of each section
var sectionsContents = [];

// Render the book
var rendition = book.renderTo("area", {  flow: "scrolled-doc", width: 600, height: 400 });

// Handle rendering events
rendition.display().then(async function() {
  var spineItems = rendition.book.spine.spineItems;
  console.log(spineItems.length)
  for(var i =0; i< spineItems.length; i++){
    spineItem = spineItems[i];
    sectionsContents.push(spineItem.contents.innerText);
    await rendition.next()
  }
    
});

This works, but seems a bit clunky.

[johnfactotum]

Instead of rendition.display(), wait for book.open(). There's also book.ready, and book.loaded.spine, etc.

var book = ePub();
book.open('myEpub.epub').then(() => { /* ... */ });

// or
var book = ePub('myEpub.epub');
book.ready.then(() => { /* ... */ });

And instead of rendition.next(), you should first get the section object and call section.load() or section.render(). See https://github.com/futurepress/epub.js/blob/master/examples/renderless.html