Как создать json в javascript?

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// Создаем JavaScript-объект
var obj = {name: "John", age: 30, city: "New York"};

// Преобразуем его в JSON-строку
var jsonString = JSON.stringify(obj);

console.log(jsonString);
// Вывод: {"name":"John","age":30,"city":"New York"}

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var json = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

console.log(json);
// Вывод: {"name":"John","age":30,"city":"New York"}

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var obj = {
  "name": "John",
  "age": 30,
  "city": "New York",
  "hobbies": ["reading", "running"],
  "address": {
    "street": "123 Main St",
    "zipCode": "10001"
  }
};

console.log(JSON.stringify(obj));
// Вывод: {"name":"John","age":30,"city":"New York","hobbies":["reading","running"],"address":{"street":"123 Main St","zipCode":"10001"}}