fchasen

var epubcfi = new EPUBJS.EpubCFI();
var text;

// Find the range
var range = epubcfi.generateRangeFromCfi("epubcfi(/6/14[xchapter_001]!4/2/14/2[c001p0006]/1:305)", Book.renderer.doc);
text = range.toString();

// Or find the containing element and then get the offset
var parent = epubcfi.findParent("epubcfi(/6/14[xchapter_001]!4/2/14/2[c001p0006]/1:305)", Book.renderer.doc);
text = parent.textContent

fchasen

// From: https://github.com/futurepress/epub.js/blob/master/reader_src/controllers/controls_controller.js

var hashChanged = function(){
	var hash = window.location.hash.slice(1);
	book.goto(hash);
};

book.on('renderer:locationChanged', function(cfi){
  var cfiFragment = "#" + cfi;

fchasen

Book.on("renderer:visibleRangeChanged", function(cfirange) {
  var text = '';
  var cfi = new EPUBJS.EpubCFI();
  var startRange = cfi.generateRangeFromCfi(cfirange.start, Book.renderer.render.document);
  var endRange = cfi.generateRangeFromCfi(cfirange.end, Book.renderer.render.document);
  // Create a new range to handle full cfi range (this should be fixed in v0.3)
  var fullRange = document.createRange();

  if (startRange) {
    fullRange.setStart(startRange.startContainer, startRange.startOffset);

fchasen

book.on('renderer:locationChanged', function(locationCfi){
  var epubcfi = new EPUBJS.EpubCFI();
  var doc = book.renderer.doc;
  var mark = document.createElement("a");
  
  // Give the marker an unique id
  mark.id = "look-for-me-1234";
  
  // Add the marker
  epubcfi.addMarker(locationCfi, doc, marker);

fchasen

let flow = new Flow("#someid");

let page = flow.pages(":first");
page.toRange();

let words = flow.pages().sentences(":last").words(-3);
words.wrap("<span class='no-break'>");

words.breakBefore();
words.breakAfter();