geraldotech/checkAgeNumber.html

## checkAgeNumber.html
<!DOCTYPE html>
<html lang="en" style="color-scheme: dark">
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Chek Age Number</title>
  </head>
  <body>
    <input type="number" />
    <p></p>

    <script>
      document.querySelector("input").addEventListener("input", check);
      const p = document.querySelector("p");

      function check(e) {
        const age = e.target.value;
        p.innerHTML = `${age >= 18 ? "maior idade" : "menor idade"}`;
        if (age.length == 0) {
          p.innerHTML = "";
        }
      }
    </script>
  </body>
</html>
	<!DOCTYPE html>
	<html lang="en" style="color-scheme: dark">
	<head>
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>Chek Age Number</title>
	</head>
	<body>
	<input type="number" />
	<p></p>

	<script>
	document.querySelector("input").addEventListener("input", check);
	const p = document.querySelector("p");

	function check(e) {
	const age = e.target.value;
	p.innerHTML = `${age >= 18 ? "maior idade" : "menor idade"}`;
	if (age.length == 0) {
	p.innerHTML = "";
	}
	}
	</script>
	</body>
	</html>