JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Natus ea tenetur illo provident aspernatur. Amet animi, ipsa, doloremque labore repellendus totam ea sequi ullam explicabo aperiam reprehenderit nobis hic nisi.
</div>

SCSS

$baseViewportSize: 500px;
@function fz($fz, $viewport: $baseViewportSize) {
  @return ($viewport / $fz) * 1vw;
}

@function lh($v){
  $fz: fz(50px);
  @return $fz * $v;
}

div {
  font-size: fz(50px);
  line-height: lh(0.95);
}