JavaScript에서 화살표 키 누름을 감지하는 방법은 무엇입니까?

function checkKey(e) {
    var event = window.event ? window.event : e;
    if (event.type === "keydown") {
        console.log(event.keyCode);
    }
}

function checkKey(e) {
    var event = window.event ? window.event : e;
    if (event.type === "keydown") {
        switch (event.keyCode) {
            case 37:
                // Left key pressed
                break;
            case 38:
                // Up key pressed
                break;
            case 39:
                // Right key pressed
                break;
            case 40:
                // Down key pressed
                break;
        }
    }
}