javascript keyboard events

1document.addEventListener('keydown', function(event) {
2    if(event.keyCode == 37) {
3        alert('Left was pressed');
4    }
5    else if(event.keyCode == 39) {
6        alert('Right was pressed');
7    }
8});

1document.addEventListener("keydown", function(event) {
2  if (event.keyCode == 32) {
3    console.log("Space was pressed!");
4  }
5});

1document.addEventListener("keydown", function(event) {
2  console.log(`Key pressed: ${event.key}`);
3  // event.key is a string representing which key has been pressed
4});