Ejercicio-1

Ejercicio 1:

Censored Keyboard: program a text field (an input tag) where the letters Q, W, and X cannot be typed into.

<input type="text">
<script>
  var field = document.querySelector("input");
  field.addEventListener("keydown", function(event) {
    if (event.keyCode == "Q".charCodeAt(0) ||
        event.keyCode == "W".charCodeAt(0) ||
        event.keyCode == "X".charCodeAt(0))
      event.preventDefault();
  });
</script>