Object in js

OBJECT

• Objects are variables that can store both values and functions.
• Values are stored as key:value pairs called properties.
• Functions are stored as key:function() pairs called methods

Object Properties

• Properties are key:value Pairs
• A JavaScript object is a collection of properties
• Properties can be changed, added, and deleted
• can access object properties in these ways Dot notation Bracket notation Expression

const mobile1={
    brand:"samsung",
    price:20000,
    Storage:{
        ram:"4gb",
        rom:"64gb"
    }
}
const mobile2={
    brand:"Android",
    price:22000,
    Storage:{
        ram:"8gb",
        rom:"128gb"
    }
}
const mobile3={
    brand:"Apple",
    price:70000,
    Storage:{
        ram:"8gb",
        rom:"512gb"
    }
}
mobile1.name="readme"
console.log(mobile1);
// let result = ("price" in mobile1);
// console.log(mobile1.brand);
// console.log(mobile2.Storage.ram);
// console.log(mobile3.price);

Output:samsung
8gb
70000

1.Change property

mobile1.price=15000

2.Add property

mobile1.name="poco"

3.delete property

mobile1.name="poco"

4.Check if property exists

let result=("price" in mobile1)

5.Nested property

const mobile1={
    brand:"samsung",
    price:20000,
    Storage:{
        ram:"4gb",
        rom:"64gb"
    }
}

Object Methods

• Methods are actions that can be performed on objects
• Methods are functions stored as property values

 const mobile4={
    brand:"samsung",
    price:20000,
    Storage:{
        ram:"4gb",
        rom:"64gb"
    },
    browse:function(){
        console.log("5g speed browsing")
    }
}
mobile4.browse()

Output:5g speed browsing

this keyword

 const mobile4 = {
        brand: "samsung",
        price: 20000,
        Storage: {
            ram: "4gb",
            rom: "64gb"
        },
        browse: function () {
            // console.log("5g speed browsing")
            console.log(this.brand + "5g speed browsing")                                      
        }
    }
    // mobile4.browse()
    this.browse=mobile4.browse;
    this.browse();

Output:samsung5g speed browsing