JSFiddle - React, Tailwind, and code Playground

HTML

qwerthj

CSS

.myClass {
    width : 200px;
    font-family : Verdana;
    font-size : 12px;
}

JavaScript

var title = $("<p/>").attr({id: "myId"}).addClass("myClass").appendTo('body');    
var titW = title.width();
var titFSize = parseInt(title.css("fontSize"));
var titFFamily = $("<p/>").css("fontFamily");
console.log(titW, titFSize, titFFamily);