<input type="number" id="age">
let elt = document.getElementById("age");
elt.addEventListener("input", e => {
e.target.value = e.target.value < 0 ? 0 : e.target.value > 122 ? 122 : e.target.value;
});
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.