Classes

Question 1

What are classes in relation to JavaScript and Object Oriented Programing (OOP)?

Answer 1

Classes are a method for a developer to create similar objects quickly.

Question 2

How are classes useful in object creation?

Answer 2

They allow us to reduce duplicate code and the time taken to debug a program.

Question 3

What is one key difference in the syntax between objects and classes in JavaScript.

Answer 3

Classes contain a constructor method that allows the building of the initial key:value of the new object created by the Class.

Question 4

By convention, how should we name our Classes in JavaScript?

Answer 4

They should be named in CamelCase but with a starting Capital letter.

Question 5

What is a class instance in JavaScript?

Answer 5

An instance is an object, created using the Class, but with key:value pairs specific to that object

Question 6

How do we create an instance of a class in JavaScript?

Answer 6

We use the ‘new’ keyword:

const objectName = new ClassName(‘parameter’)

Question 7

Syntactically, what is different between methods in Objects and Classes?

Answer 7

You cannot use commas to separate methods in Classes