JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="myFunction()">Try it</button>

<p><span id="rslt"></span></p>
<style>
#rslt
{
  border: 1px solid red;
  }
}
</style>
<script>
function myFunction() {
  let prompt = "Press a button!\nEither OK or Cancel.";
  let text= 'uninit'
  if (confirm(prompt) == true) {
    text = "You pressed OK!";
  } else {
    text = "You canceled!";
  }
  document.getElementById("rslt").innerHTML = text;
}
</script>