JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="ta" spellcheck="false"></textarea>
<div>
  <input type="button" id="spell_btn" value="spell check">
</div>

JavaScript

$( document ).ready(function() {
  $("#spell_btn").on('click', function () {
      $("#ta").attr("spellcheck", "true");
  });
});//close dcoument.ready