JSFiddle - React, Tailwind, and code Playground

HTML

<form>
  Password
  <br>
  <input id="psw" type="password" name="password" size="45" autofocus />
  <br>
  <br>
  <input type="button" value="Login" onclick="message();" />
</form>

<div id="display">hi</div>

JavaScript

function message() {
  if (document.getElementById("psw").value == "thePassword") {
    document.getElementById("display").innerHTML = "Logged in";
  } else {
    document.getElementById("display").innerHTML = "Try again!";
  }
}