try it: using height | Chinese Rule of Eight

function numOfLines(textInEle, eleSel) {

var para = win.document.querySelector(eleSel);

var font = win.getComputedStyle(para).getPropertyValue('font-family');

var fontSize = win.getComputedStyle(para).getPropertyValue('font-size');

font = font.replace(/"/g, '');

var HEIGHT_OF_LINE = $.fn.textHeight('LoReM iPsUm', eleSel, font, fontSize);

var b = $.fn.textHeight(textInEle, eleSel, font, fontSize);

return (b/HEIGHT_OF_LINE);

}

font-family: ‘FSElliotPro’
font-size: 14px