Javascript - Class and Object, Inheritance, Rest Parameters, Spread Operators, DeStructuring

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What is class in javascript?
A class is a type of object template. The class statement initiates a JavaScript class. Properties and methods are assigned in the constructor() method. The constructor() method is called each time a class object is initialized.

In JavaScript, an object is a standalone entity, with properties and type. Compare it with a cup, for example. A cup is an object, with properties. A cup has a color, a design, weight, a material it is made of, etc. The same way, JavaScript objects can have properties, which define their characteristics.

A constructor is a special function that creates and initializes an object instance of a class. In JavaScript, a constructor gets called when an object is created using the new keyword. The purpose of a constructor is to create a new object and set values for any existing object properties.

What is Inheritance?
Inheritance enables you to define a class that takes all the functionality from a parent class and allows you to add more. Using class inheritance, a class can inherit all the methods and properties of another class. Inheritance is a useful feature that allows code reusability.

What is rest and spread operator?
The rest operator (…) allows us to call a function with any number of arguments and then access those excess arguments as an array. The rest operator also allows us in destructuring array or objects. The spread operator (…) allows us to expand an iterable like array into its individual elements.

What is destructuring?
The destructuring assignment syntax is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.