如何从嵌套的JSON有效负载(JavaScript)中删除特定元素？

function deleteElement(json, elementToDelete) {
  for (var key in json) {
    if (json.hasOwnProperty(key)) {
      if (json[key] === elementToDelete) {
        delete json[key];
      } else if (typeof json[key] === 'object') {
        deleteElement(json[key], elementToDelete);
      }
    }
  }
}

// 示例JSON有效负载
var payload = {
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "country": "USA"
  },
  "contacts": [
    {
      "type": "email",
      "value": "john@example.com"
    },
    {
      "type": "phone",
      "value": "555-1234"
    }
  ]
};

// 删除特定元素
deleteElement(payload, "USA");

// 将修改后的JSON对象转换回字符串
var modifiedPayload = JSON.stringify(payload);
console.log(modifiedPayload);