JSFiddle - React, Tailwind, and code Playground

HTML

<form method="GET" target="_blank" action="http://localhost:9615/">
  <input name="q" value="AAA" />
  <input type="submit" />
</form>

JavaScript

document.forms[0].onsubmit = function() {
  document.forms[0].submit();
  document.forms[0].children.q.value = 'BBB';
  return true;
}