js移除json中的元素

let jsonObj = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

// 删除 "age" 属性
delete jsonObj.age;

console.log(jsonObj);
// 输出: { name: 'John', city: 'New York' }

let jsonObj = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

// 创建一个新对象，不包含 "age" 属性
let newObj = Object.assign({}, jsonObj, { age: undefined });

// 或者使用扩展运算符
let newObj2 = { ...jsonObj, age: undefined };

console.log(newObj);
console.log(newObj2);
// 输出: { name: 'John', city: 'New York' }

let jsonString = '{"name":"John","age":30,"city":"New York"}';

// 使用正则表达式移除 "age" 属性
let newJsonString = jsonString.replace(/"age":\d+,?/, '');

let newObj = JSON.parse(newJsonString);

console.log(newObj);
// 输出: { name: 'John', city: 'New York' }

if ('name' in jsonObj) {
  // 对象仍然有效
}

function removeProperties(obj, propertiesToRemove) {
  propertiesToRemove.forEach(prop => {
    delete obj[prop];
  });
}

let jsonObj = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

removeProperties(jsonObj, ['age', 'city']);

console.log(jsonObj);
// 输出: { name: 'John' }