how to identify keypress in javascript code example

Example 1: how to detect a keypress in javascript

window.addEventListener("keydown", (event) => {
	console.log(event.key);
});

Example 2: how do i listen to a keypress in javascript

let b = document.getElementById("body"); //making var for body
b.addEventListener("keydown", (evt) => {//when this happens
	console.log(evt.keyCode); //log keycode
});

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