javascript - 如何使用 Jquery 的 Javascript 从具有不同格式的嵌套 JSON 中提取值？

Question

var cart =
 [
 {
    "Items": "",
    "category": "",
    "contents":
 [
 {
    "Apple iPhone": "222",
    "French": "Bounjour",
    "id": 1234,
    "icon": "/images/bg.jpg",
    "callback": "use()",
    "pricetag":"false"
 }
 ]
 }, 
 {
    "Items": "No 2",
    "category": "2nd",
    "contents":
 [
 {
    "redmi": "333",
    "French": "some text",
    "id": 345787,
    "icon": "/images/bg.jpg",
    "callback": "use()",
    "pricetag":"true"
 }, 
 {
    "samsung": "333",
    "French": "some text",
    "id": 86787876,
    "icon": "/images/bg.jpg",
    "callback": "use()",
    "pricetag":"disabled"
 }
 ]
 }
 ];

任何人都可以帮我从上面的 JSON 中获取“id”值和“pricetag”值吗？它是嵌套的，并且可以采用不同的格式。但在每个中，我需要提取 id 值和价格标签值。我尝试了很多东西但没有得到准确的输出。有人可以帮帮我吗 ？抱歉格式错误..

Answer 1

使用.map()迭代并返回所需的键:

var cart = [{
    "Items": "",
    "category": "",
    "contents": [{
      "Apple iPhone": "222",
      "French": "Bounjour",
      "id": 1234,
      "icon": "/images/bg.jpg",
      "callback": "use()",
      "pricetag": "false"
    }]
  },
  {
    "Items": "No 2",
    "category": "2nd",
    "contents": [{
        "redmi": "333",
        "French": "some text",
        "id": 345787,
        "icon": "/images/bg.jpg",
        "callback": "use()",
        "pricetag": "true"
      },
      {
        "samsung": "333",
        "French": "some text",
        "id": 86787876,
        "icon": "/images/bg.jpg",
        "callback": "use()",
        "pricetag": "disabled"
      }
    ]
  }
];


let values = cart.map((e) => {
  return e.contents.map((a) => {
    return {
      id: a.id,
      pricetag: a.pricetag
    }
  })
})

console.log(values)