JavaScript Objects

Question 1

What are objects used for?

Answer 1

To group together a set of variables(data) and functions(functionality) to create a model of something

Question 2

What are object properties?

Answer 2

Object Properties are variables within the object

Key Value Pairs - keys and values

Question 3

Describe object literal notation

Answer 3

Object Literal Notation is an array of key:value pairs.

Key:value are separated with a colon :

Key:value pairs are separated with a coma ,

You use curly braces {} for the object

Question 4

How do you remove a property from an object?

Answer 4

You remove a property using dot notation with the delete operator

delete object.property

Question 5

What are the two ways to get or update the value of a property?

Answer 5

object.propertyName = ‘propertyValue’

object[‘propertyName’] = ‘propertyValue’

Use dot notation or bracket notation