Learn the fundamentals of JavaScript to make the React journey smooth.

Android Development with Ionic and React

Most of React comes down to JavaScript ES6 and its features and syntax. The fundamentals also include ternary operators, shorthand versions in the language, objects such as “this”, and JavaScript’s built-in functions (map, reduce, filter). It also includes general concepts such as composability, reusability, immutability, or higher-order functions. While we don’t necessarily need to master all these before starting with React, they will come up while practicing it, and learning these concepts will benefit us. 
This module will give us comprehensive JavaScript skills that will make our React journey smooth and straightforward.

JavaScript Fundamentals Before Learning React

### Inheritance in JavaScript
Usually, classes are used for inheritance in object-oriented programming. Here is a brief refresher on inheritance; inheritance enables new classes to take on the properties and methods of existing classes. A class that another class inherits is called a *superclass* or *base class*. A class that inherits from a superclass is called a *subclass* or *derived class*. In JavaScript, the *`extends`* keyword can be used to inherit one class from another class as shown in the following example. So, the derived class, `ReactDeveloper`, inherits all the abilities from the base class, `Developer`, and also adds its specialized capabilities, namely the `getJob()` method to it.

# Inheritance in JavaScript
Usually, classes are used for inheritance in object-oriented programming. Here is a brief refresher on inheritance; inheritance enables new classes to take on the properties and methods of existing classes. A class that another class inherits is called a *superclass* or *base class*. A class that inherits from a superclass is called a *subclass* or *derived class*. In JavaScript, the *`extends`* keyword can be used to inherit one class from another class as shown in the following example. So, the derived class, `ReactDeveloper`, inherits all the abilities from the base class, `Developer`, and also adds its specialized capabilities, namely the `getJob()` method to it.

In this lesson, we discuss the syntax and concept of class inheritance in Javascript.

Getting Started

Variables, Operators & Expressions

Functions

Classes

Modules

React

Appendix

Conclusion

Class Inheritance

Inheritance in JavaScript