lines (v6)

    var lineregex = /\n/g;
    var lines = [];
    var position = 0;
    var match;
    do {
      match = lineregex.exec(text);
      var line = {
        line: lines.length,
        start: position
      };
      lines.push(line);

      if (match){
        line.textEnd = match.index;
        line.end = match.index + match[0].length;
        position = line.end;
      }
      else {
        line.textEnd = position + text.slice(position).length;
        break;
      }
    } while (true);

var position = 0;
lines = text.split(/\n/).map(function(lineText, index){
	var lineObject = {
		line: index,
		start: position,
	};
	position += lineText.length
	lineObject.textEnd = position;
	position += 1;
	lineObject.end = position;
	return lineObject;
});

    var lines = [];
    var position = 0;
    var index;
    while (index !== -1) {
      index = text.indexOf('\n', position);
      var line = {
        line: lines.length,
        start: position,
        textEnd: index,
        end: position = index + 1
      };
      lines.push(line);
    };
    if (lines.length){
      var lastLine = lines[lines.length - 1];
      var lineTextLength = text.slice(lastLine.start).length;
      if (lineTextLength){
        lastLine.textEnd = lastLine.start + lineTextLength;
        delete lastLine.end;
      }
      else{
        lines.pop();
      }
    }

var segmenter = new Intl.Segmenter("en", { granularity: "sentence" });
var lines = [];
var segments = segmenter.segment(text);
for (const {segment,index} of segments){
	var line = {
		line: lines.length,
		start: index,
		textEnd: index + segment.length,
	};
	line.end = line.textEnd + 1;
	lines.push(line);
}