🧠 JavaScript Objects and their Manipulations

📦 Object Creation

An example of a user-related simple object is shown below.

const user = { name: "Alice", age: 25, email: "alice@example.com" };

🔍 Accessing Values of an Object’s Property

You can access values by the property name through the dot or the brackets notation.

console.log(user.name); // Alice

console.log(user["email"]); // alice@example.com

📝 Modifying An Object's Field

To make a change to the object, assign a different value to that key.

user.age = 26;

user["email"] = "alice.new@example.com";

➕ Property Addition

It is also possible to add properties dynamically.

user.country = "India";

❌ Object Property Removal

To remove a given property, employ the delete operator.

delete user.age;

🔁 Object Key Iteration

A for…in loop will iterate all keys.

for (let key in user) {

console.log(key + ": " + user[key]);

}

✅ TL;DR: Object Cheatsheet

• To create: const obj = { key : value }
• To access: obj.key or obj[“key”]
• To update: obj.key = new Value
• To add: obj.newKey = value
• To delete: delete obj.key
• To loop: for…in for iterating in the keys or values.