JSON

{
  "name": "Ali",
  "age": 25,
  "isStudent": false,
  "skills": ["HTML", "CSS", "JavaScript"],
  "address": {
    "city": "Riyadh",
    "zip": "12345"
  }
}

// JavaScript Object
let user = {
  name: "Ali",
  age: 25
};

// JSON
let jsonString = '{"name": "Ali", "age": 25}';

let person = {
  name: "Sara",
  age: 30,
  married: true
};

let json = JSON.stringify(person);
console.log(json); // => '{"name":"Sara","age":30,"married":true}'

let jsonString = '{"name":"Sara","age":30,"married":true}';

let obj = JSON.parse(jsonString);
console.log(obj.name); // => Sara

fetch('https://jsonplaceholder.typicode.com/users')
  .then(res => res.json())
  .then(users => {
    users.forEach(user => console.log(user));
  })
  .catch(err => console.error("Error:", err));

let user = {
  name: "Ahmed",
  age: 28,
  password: "secret"
};

// تجاهل خصائص معينة (مثل password)
let json = JSON.stringify(user, ["name", "age"]);
console.log(json); // {"name":"Ahmed","age":28}

let jsonFormatted = JSON.stringify(user, null, 2);
console.log(jsonFormatted);

{
  "name": "Ahmed",
  "age": 28,
  "password": "secret"
}

let product = { id: 1, name: "Laptop" };

// تخزين
localStorage.setItem("product", JSON.stringify(product));

// استرجاع
let data = JSON.parse(localStorage.getItem("product"));
console.log(data.name); // => Laptop

let json = `{
  "user": {
    "name": "Khalid",
    "contacts": {
      "email": "[email protected]",
      "phone": "123456"
    }
  }
}`;

let obj = JSON.parse(json);
console.log(obj.user.contacts.email); // => [email protected]

let json = '{"name": "Ali", "age": 30}';

try {
  let obj = JSON.parse(json);
  console.log(obj.name);
} catch (error) {
  console.error("JSON parsing failed:", error.message);
}

let user = {
  name: "Omar",
  age: 35,
  password: "secret"
};

let json = JSON.stringify(user, ["name", "age"]);
console.log(json); // {"name":"Omar","age":35}

let user = {
  name: "Omar",
  age: 35,
  password: "secret"
};

let json = JSON.stringify(user, (key, value) => {
  if (key === "password") return undefined;
  return value;
});

console.log(json); // {"name":"Omar","age":35}

let json = '{"name":"Salma","birthYear":1995}';

let obj = JSON.parse(json, (key, value) => {
  if (key === "birthYear") {
    return new Date().getFullYear() - value;
  }
  return value;
});

console.log(obj); // { name: 'Salma', birthYear: 30 } ← أصبحت العمر

let data = {
  name: "Amin",
  greet: function () { console.log("Hi"); },
  score: undefined,
  symbol: Symbol("id"),
  date: new Date(),
  number: NaN
};

console.log(JSON.stringify(data));

{"name":"Amin","date":"2025-05-29T09:30:00.000Z","number":null}

let original = { name: "Yousef", skills: ["JS", "PHP"] };

let clone = JSON.parse(JSON.stringify(original));

clone.skills.push("Python");

console.log(original.skills); // ["JS", "PHP"]
console.log(clone.skills);    // ["JS", "PHP", "Python"]

const data = require('./data.json');
console.log(data);

import data from './data.json';
console.log(data);

let xhr = new XMLHttpRequest();
xhr.open("GET", "data.json");
xhr.onload = function () {
  if (xhr.status === 200) {
    let obj = JSON.parse(xhr.responseText);
    console.log(obj);
  }
};
xhr.send();

let form = document.querySelector("form");

form.addEventListener("submit", function (e) {
  e.preventDefault();

  let formData = new FormData(form);
  let obj = {};

  formData.forEach((value, key) => {
    obj[key] = value;
  });

  let json = JSON.stringify(obj);
  console.log(json);
});

function isValidJSON(str) {
  try {
    JSON.parse(str);
    return true;
  } catch {
    return false;
  }
}

console.log(isValidJSON('{"name":"Lina"}')); // true
console.log(isValidJSON('{name:"Lina"}'));   // false (الاسم ليس بين "")