Getting all the object properties/attributes

Getting all the properties of an object

The Object.keys() method returns an array containing all the keys/properties of a given object.

const user = {
  name: 'John',
  age: 30,
}

console.log(Object.keys(user)) // ['name', 'age']

Usecases

• If you need to check whether a specific property exists in an object, you can use Object.keys() and then search for the property in the resulting array.

const user = {
  name: 'John',
  age: 30,
}

const propertyToCheck = 'name'
const isExit = Object.keys(user).includes(propertyToCheck)
  ? 'Exists'
  : 'Does not exist'

console.log(`The property "${propertyToCheck}" ${isExit}.`)

• If you need to get all the properties of an object, you can use Object.keys() and then loop through the resulting array.

for (const key of Object.keys(user)) {
  console.log(user[key])
}