Object Properties

const phone = {
  brand: 'iPhone',
  model: '15 Pro',
  storage: 256
}
 console.log(phone.brand)    // 'iPhone'
console.log(phone.model)    // '15 Pro'
console.log(phone.storage)  // 256

console.log(phone['brand'])    // 'iPhone'
console.log(phone['model'])    // '15 Pro'
 // Useful when property name is in a variable
const prop = 'storage'
console.log(phone[prop])       // 256

const player = {
  name: 'Alex',
  score: 0,
  level: 1
}
 console.log(player.score)  // 0
 // Update the score
player.score = 100
console.log(player.score)  // 100
 // Update multiple properties
player.score = 250
player.level = 2
console.log(player)        // { name: 'Alex', score: 250, level: 2 }

const pet = {
  name: 'Max',
  type: 'dog'
}
 console.log(pet)  // { name: 'Max', type: 'dog' }
 // Add a new property
pet.age = 3
pet.breed = 'Labrador'
 console.log(pet)
// { name: 'Max', type: 'dog', age: 3, breed: 'Labrador' }

const item = {
  name: 'Sword',
  damage: 50,
  temporary: true
}
 // Remove a property
delete item.temporary
 console.log(item)  // { name: 'Sword', damage: 50 }

const user = {
  username: 'coder123',
  email: '[email protected]'
}
 console.log('username' in user)   // true
console.log('password' in user)   // false
console.log('email' in user)      // true

if (user.hasOwnProperty('email')) {
  console.log('Email exists!')
  console.log(user.email)
}
 // Safer way to access properties
if (user.password !== undefined) {
  console.log('Has password')
} else {
  console.log('No password set')
}