JSFiddle - React, Tailwind, and code Playground

JavaScript

document.write ('<ol>');
for (var i = 20; i >= 0; i--) {    
    document.write('<li><div style="font-size:' + i +'px">Шрифт размером' + i + 'px</div></li>');   
}
 document.write ('</ol>');