Question

我有一个具有此静态结构的对象：

let obj = {
    "id": "",
    "id_configuration": "",
    "comment": "",
    "mw_assigned": "",
};

我想按键更新其属性。例如，如果我收到

const key = 'mw_assigned'
const value = '23'

然后我要更新对象并拥有：

let obj = {
    "id": "",
    "id_configuration": "",
    "comment": "",
    "mw_assigned": "23",
};

我该怎么办？我试图创建一个新的对象，像这样：

const new_obj = { ...obj, key: value }

我不知道如何从vars中设置键的名称和值

Answer 1

使用Computed property names

这让人想起属性访问器的bracket notation 语法

let obj = {
  "id": "",
  "id_configuration": "",
  "comment": "",
  "mw_assigned": "",
};

const key = 'mw_assigned'
const value = '23'

const new_obj = { ...obj, [key]: value }

console.log(new_obj)

Answer 2

您可以用作obj[key]

  let obj = {
        "id": "",
        "id_configuration": "",
        "comment": "",
        "mw_assigned": "",
    };

const key = 'mw_assigned';
const value = '23';

   // obj[key] = value;

   const new_obj = { ...obj,  [key]: value }
console.log(new_obj );

JavaScript，使用动态键更新对象

2 个答案: