타입스크립트 좌표 이동 예제

type direction = "up" | "down" | "left" | "right";
let position = { x: 0, y: 0 };
function move(dir: direction) {
  if (dir === "up") {
    position.y++;
  }
  if (dir === "down") {
    position.y--;
  }
  if (dir === "left") {
    position.x--;
  }
  if (dir === "right") {
    position.x++;
  }
}

console.log(position); // { x: 0, y: 0}
move("up");
console.log(position); // { x: 0, y: 1}
move("down");
console.log(position); // { x: 0, y: 0}
move("left");
console.log(position); // { x: -1, y: 0}
move("right");
console.log(position); // { x: 0, y: 0}