📘 دليل JavaScript الأنماط المتقدمة

async function fetchData() {
  try {
    const response = await fetch("https://api.example.com/data");
    const data = await response.json();
    console.log(data);
  } catch (error) {
    console.error("Error:", error);
  }
}

new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("Success");
  }, 1000);
}).then(result => {
  console.log(result);
}).catch(error => {
  console.error(error);
});

function createCounter() {
  let count = 0;
  return {
    increment: () => count++,
    decrement: () => count--,
    getCount: () => count
  };
}

const counter = createCounter();
counter.increment();

// math.js
export const add = (a, b) => a + b;
export const subtract = (a, b) => a - b;

// app.js
import { add, subtract } from "./math.js";
console.log(add(5, 3));

const user = {
  name: "Ahmed",
  age: 25,
  city: "Cairo"
};

const { name, age } = user;
console.log(name);

const arr1 = [1, 2, 3];
const arr2 = [...arr1, 4, 5];

const obj1 = { a: 1 };
const obj2 = { ...obj1, b: 2 };

const numbers = [1, 2, 3, 4, 5];

const doubled = numbers.map(n => n * 2);
const evens = numbers.filter(n => n % 2 === 0);
const sum = numbers.reduce((acc, n) => acc + n, 0);