Let people type
Sign-up forms, search boxes, chat apps: they all read what someone typed. Today you'll read text boxes and handle forms.
Reading .value
const input = document.querySelector("#name");
const out = document.querySelector("#out");
input.addEventListener("input", () => {
out.textContent = "Hello, " + input.value;
});.value is always a string, even if someone types 42. Use Number(input.value) for maths.