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                <div class="container">
  <p class="myText">Alëksej Fedorovič Karamazov era il terzo figlio di un proprietario terriero del nostro distretto, Fëdor Pavlovič Karamazov, assai noto ai suoi tempi  (e del resto ancor oggi ricordato fra noi) per la sua tragica e oscura fine, avvenuta esattamente tredici anni fa e della quale parlerò a tempo debito.</p>
  <button onclick="countLines()">Count lines</button>
  <button onclick="clearResults()">Clear</button>
  <p class="results"></p>



                @import ',700';
body {
  font-family: 'Roboto Mono', monospace;
    background: #2c322e;
  height: calc(100% -40px);

.container {
  height: auto;
  width: 600px;
  justify-content: left;
  align-items: top;
  display: flex;
  box-sizing: border-box;

.results {
  font-size: 0.85em;

button {
  cursor: pointer;
  background: transparent;
  border:1px solid #fff;

p {
  line-height: 1.5;
  font-weight: 300;
  font-size: 16px;
  color: #fafafa;

b {font-weight: 700;}



                var results = document.querySelector(".results");

function countLines() {
  //Recupero dei dati e generazione delle variabili
  var item = document.querySelector(".myText");
  var myWidth = item.offsetWidth;
  var myString = item.innerHTML;

  //Popolamento dell'array:
  var myChars = myString .split(" ");
  for (let i=0; i<myChars.length; i++) {
    myChars[i] += " ";
    myChars[i] = myChars[i].split("");   
  let w = getComputedStyle(item).fontWeight;
  let s = getComputedStyle(item).fontSize;
  let f = getComputedStyle(item).fontFamily;
  var font = w.concat(" ",s," ",f);
  let letterWidth = getTextWidth("a", font);
  let measure = 0;
  for(let i=0; i<myChars.length; i++) {
        for(let j=0; j<myChars[i].length; j++) {
            measure += letterWidth;
            if (measure > myWidth){
               measure = 0;
               myChars.splice(i, 0, '\n');
  let arr = [];
  for(let i=0; i<myChars.length; i++) {
    for(let j=0; j<myChars[i].length; j++) {
  let t = arr.join('');  
  let splitLines = t.split('\n');
  results.innerHTML = 'Il paragrafo ha: <b>' + splitLines.length + '</b> righe.' + '<br/>' + 'Il contenuto della <b>seconda</b> riga è:<br/><em>' + splitLines[1]; + '</em>'

function clearResults() {
  results.innerHTML = '';  

function getTextWidth(text, font) {
  var canvas = getTextWidth.canvas || (getTextWidth.canvas = document.createElement("canvas"));
  var context = canvas.getContext("2d");
  context.font = font;
  var metrics = context.measureText(text);
  return metrics.width;