test/p5.js/p5.js_key_2.htm

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="cache-control" content="no-cache">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>p5.js test</title>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.3.1/p5.min.js"></script>
</head>
<body>
  <script>
    function setup() {
      createCanvas(200, 100);
      background(1, 70, 100);
      fill('yellow');
      textSize(24);
      }
    function keyPressed() { 
      background(1, 70, 100);
      text(key, 10, 30);
      text(keyCode, 10, 50);
      }
    function draw() {
      }
  </script>
</body>
</html>