JS 对象 合并

来自：https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Syntax

用法

const object1 = {
  a: 1,
  b: 2,
  c: 3
};

const object2 = Object.assign({}, object1);

console.log(object2.c);
// expected output: 3