input2

let input2 = `forward 2
down 9
up 6
forward 1
down 5
down 7`
  .split(/\n/)
  .map((command) => {
    let [direction, distance] = command.split(" ");

    return { direction, distance: parseInt(distance) };
  });

let horizontalPosition = 0;
let depthPosition = 0;
let result;

function coordinates() {
  for (let command of input2) {
    switch (command.direction) {
      case "forward":
        horizontalPosition += command.distance;
        break;
      case "up":
        depthPosition -= command.distance;
        break;
      case "down":
        depthPosition += command.distance;
        break;
    }
  }
  return { depth: horizontalPosition, horizontal: depthPosition };
}
console.log(coordinates(input2));