function move({ x, y } = { x: 0, y: 0 }) {
return [x, y];
}
console.log(move({ x: 3, y: 8 })); // [3, 8]
console.log(move({ x: 3 })); // [3, undefined]
console.log(move({})); // [undefined, undefined]
console.log(move()); // [0, 0]
原文：https://www.cnblogs.com/blogZhao/p/12553683.html