Advanced JavaScript Tutorial in Telugu | Part 2

JavaScript అనేది వెబ్ డెవలప్మెంట్ లో ముఖ్యమైన భాష. Part-1 లో మనం basic topics చూశాం.
ఈ Part-2 లో advanced concepts, ES6 features, async programming, OOP, DOM advanced topics—all included.

Advanced JavaScript- Web Development

⭐ 1. ES6 Features (Modern JavaScript)

✔ let & const


let name = "Ravi";
const age = 25;

✔ Arrow Functions


const add = (a, b) => a + b;
console.log(add(5, 10));

✔ Template Literals


let user = "Ravi";
console.log(`Hello ${user}!`);

✔ Spread & Rest Operators


let nums = [1,2,3];
let newNums = [...nums, 4, 5];

✔ Object Destructuring


const person = {name:"Ravi", age:25};
const {name, age} = person;

⭐ 2. Advanced Functions

✔ Callback Function


function greet(name, callback) {
  console.log("Hello " + name);
  callback();
}

greet("Ravi", ()=>console.log("Callback executed!"));

✔ Closure


function outer() {
  let x = 10;
  return function inner() {
    console.log(x);
  };
}
outer()();

⭐ 3. Asynchronous JavaScript

✔ Promise


let p = new Promise((resolve)=>resolve("Done"));
p.then(result => console.log(result));

✔ Async / Await


async function data(){
  return "Hello";
}
data().then(console.log);

✔ Fetch API


fetch("https://api.example.com/data")
  .then(res => res.json())
  .then(data => console.log(data));

⭐ 4. JavaScript OOP (Object Oriented Programming)

✔ Class


class Person {
  constructor(name){
    this.name = name;
  }
  speak(){
    console.log("Hello, I'm " + this.name);
  }
}

let p1 = new Person("Ravi");
p1.speak();

⭐ 5. Advanced DOM Manipulation

✔ create element


let h1 = document.createElement("h1");
h1.innerText = "Hello Students!";
document.body.appendChild(h1);

✔ Event Delegation


document.getElementById("list").addEventListener("click",(e)=>{
  console.log("Clicked: " + e.target.innerText);
});

⭐ 6. LocalStorage


localStorage.setItem("name","Ravi");
console.log(localStorage.getItem("name"));

⭐ 7. Array Advanced Methods

✔ map()


let nums = [1,2,3];
let doubled = nums.map(n=>n*2);

✔ filter()


let even = nums.filter(n=>n%2===0);

✔ reduce()


let total = nums.reduce((a,b)=>a+b,0);

Conclusion

ఈ Part-2 లో JavaScript లోని modern & advanced concepts మొత్తం cover చేసాం.
ఇవి practice చేస్తే మీరు real-world web developer కావడానికి సిద్ధం అవుతారు.

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