JavaScript? ??

JavaScript?? ??? ?? ???(??) ?? ??(???)? ? ?? ?-? ?? ?????. ??, ??, ??? ?? ???? ???? JavaScript? ?? ?? ?? ???? ??? ??? JavaScript? ?????.

---

1. ?? ??

?. ?? ???

??? ???? ?? ??? ??? ??? {}? ???? ????.

?:

const person = {
  name: "Alice",
  age: 25,
  greet: function () {
    console.log("Hello!");
  },
};

console.log(person.name); // Output: Alice
person.greet(); // Output: Hello!

?. ?? ???

?? ???? ???? ? ??? ?????.

?:

const person = new Object();
person.name = "Bob";
person.age = 30;
person.greet = function () {
  console.log("Hi!");
};

console.log(person.name); // Output: Bob
person.greet(); // Output: Hi!

?. Object.create() ??

? ???? ??? ??????? ? ??? ?????.

?:

const prototype = { greet: function () { console.log("Hello!"); } };
const person = Object.create(prototype);
person.name = "Charlie";
console.log(person.name); // Output: Charlie
person.greet(); // Output: Hello!

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2. ?? ?? ???

?. ? ???

?(.)? ???? ??? ??????.

?:

console.log(person.name); // Output: Alice

?. ?? ??

???([])? ???? ??? ??????. ?? ?? ??? ?????.

?:

console.log(person["name"]); // Output: Alice
const key = "age";
console.log(person[key]); // Output: 25

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3. ?? ??, ?? ? ??

• ??:

person.country = "USA";
console.log(person.country); // Output: USA

• ??:

person.age = 26;
console.log(person.age); // Output: 26

• ??:

delete person.age;
console.log(person.age); // Output: undefined

---

4. ??? ???

??? ??? ??? ?? ?? ????? ???.

?:

const car = {
  brand: "Tesla",
  start: function () {
    console.log("Car started!");
  },
};

car.start(); // Output: Car started!

---

5. ?? ?? ??

?. for...in?? ??

??? ?? ??? ?? ??? ?????.

?:

for (let key in person) {
  console.log(`${key}: ${person[key]}`);
}

?. Object.keys() ??

??? ? ??? ?????.

?:

Object.keys(person).forEach((key) => {
  console.log(`${key}: ${person[key]}`);
});

?. Object.entries() ??

[?, ?] ?? ??? ?????.

?:

Object.entries(person).forEach(([key, value]) => {
  console.log(`${key}: ${value}`);
});

---

6. ?? ???

JavaScript? ?? ??? ?? ?? ?? ???? ?????.

• Object.sign(): ? ??? ??? ?? ??? ?????.

const person = {
  name: "Alice",
  age: 25,
  greet: function () {
    console.log("Hello!");
  },
};

console.log(person.name); // Output: Alice
person.greet(); // Output: Hello!

• Object.freeze(): ?? ??? ?????.

const person = new Object();
person.name = "Bob";
person.age = 30;
person.greet = function () {
  console.log("Hi!");
};

console.log(person.name); // Output: Bob
person.greet(); // Output: Hi!

• Object.seal(): ?? ?? ?? ??? ????? ?? ?? ??? ?????.

const prototype = { greet: function () { console.log("Hello!"); } };
const person = Object.create(prototype);
person.name = "Charlie";
console.log(person.name); // Output: Charlie
person.greet(); // Output: Hello!

---

7. ?????? ??

JavaScript? ???? ??? ???? ???? ? ?? ??? ?????? ????.

?:

console.log(person.name); // Output: Alice

---

8. ?? ????

?? ??? ?? ??? ??? ??? ??? ? ????.

?:

console.log(person["name"]); // Output: Alice
const key = "age";
console.log(person[key]); // Output: 25

---

9. ??

• ??? ??? ???? ??? ? ?? ?-? ????.
• ??? ?? ???? ?? ???? ?????.
• ? ?? ?? ???? ???? ?? ??? ??????.
• ???? ?? ??? ?? Object.keys(), Object.Assign() ? Object.freeze()? ?? ?? ???? ?????.
• ????? ? ??? ?? ?? JavaScript ??? ????? ??? ????? ?? ?????.

?????. ?? Abhay Singh Kathayat???!
?? ?????? ??? ?? ??? ?? ?? ??? ?? ??? ??????. ?? ????? ?? ???? ??? ???? ??????? ???? ?? ??? ????? ??? ?????? ???? ?????.
? ???? ???(kaashshorts28@gmail.com)? ???? ??????.

? ??? JavaScript? ?? ?????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!