JavaScript learning roadmap 2023 — The Ultimate Guide
What is JavaScript? — A high-level definition
JavaScript is a scripting or programming language that allows you to implement complex features & interactive effects on web pages.
JavaScript is evolving: The initial versions of the scripting language were for internal use only. After Netscape submitted it to ECMA International as a standard specification for web browsers, JavaScript pioneered the release of ECMAScript.
JavaScript has continued to grow alongside new browsers like Mozilla Firefox and Google Chrome since then. The latter even started developing the first modern JavaScript engine, called V8, which compiles bytecode into native machine code.
5 reasons you should learn JavaScript in 2023
1. JavaScript jobs are in high demand
According to the 2022 StackOverflow developer survey, Statista, University of California Berkeley, and devjobsscanner.com, JavaScript is the most in-demand programming language right now.
2. JavaScript is simple
JavaScript is one of the easiest programming languages with many free tutorials online.
You can get the basics down and then add in HTML and CSS to start building apps and websites.
3. JavaScript developers are high in Salary
Take into consideration that the average salary for a JavaScript developer has increased by almost 35% in the last 20 years.
Moreover, the salary bump is still on an annual increase, with the average JavaScript developer now earning approximately $97,577 to $119,839 a year.
4. JavaScript can be used everywhere — Learn just one language and use it everywhere
JavaScript can be used for front-end and back-end code(Full Stack).
Once you have the fundamentals of JavaScript down, you can learn React, Next, Nust, React Native, Node.js, Express.js, and more.
Could be used in Frontend web: Being the most famous framework of the JavaScript language, React Js and Next Js have covered the whole world of web application development. Some of the top market-defining products out there (Instagram, Reddit, and Facebook being the most vivid examples).
Could be used in Frontend Mobile Apps:: React Native combines the best parts of native development with React, a best-in-class JavaScript library for building user interfaces. We can create native apps for Android, iOS, and more using JavaScript
Could be used in Backend: Meanwhile, backend development focuses on the side of a website users can’t see (the server side). i.e. database management and response to the frontend calls.
The most commonly used framework nowadays are Node JS, Express Js, NUST js, and GraphQL for the backend development
By learning only a single Language Javascript(React + Node) you become a “Full Stack Developer”
5. Activate a new part of your brain
Programming may not be something you’re familiar with and learning a new skill is a great way to stimulate your brain.
Roadmap to Learn JavaScript in 2023
1- Variables (var, let, const)
2- Data Types and their methods
Primitive (Non-object/simple) data types
Non-Primitive (Objects / Arrays) data types
3- Operators
Assignment operator ( = )
JavaScript Arithmetic Operators (+,-, *, **, /, %, ++, — )
JavaScript Comparison Operators (==, ===, !=, !==, >, <, )
JavaScript Logical Operators (&&, II, !)
JavaScript Typeof Operator
4- If else and Switch statement
5- Functions
Simple functions
Functions with params & default params
Arrow functions
“this” keyword in functions vs Arrow functions
6- Objects in detail
Object methods
Deep copy vs shallow copy
Clone object
Object destructuring
7- Arrays in detail
Array Methods
Higher-order Array methods
Chaining
8- Template literals
9- Understand the scope concept
Global vs Block vs function level Scope
10- Hoisting
11- Spread operator
Spread operator for Arrays
Spread operator for objects
12- Rest Operator
13- Import and export
Default export vs named export
14- Promises, Async & Await
15- Sets
Sets methods (add, delete, has, clear)
How sets reduce complexity
remove duplicates using sets
16- Constructor function prototype inheritance in JavaScript
17- Classes in JavaScript
OOP concepts
18- Cookies vs Localstorage
19- The concepts of how the JavaScript Engine works
Execution Context
Global execution context
Function execution context
Eval execution context
Execution context Stack
Lexical Scope
20- Closures in JavaScript
21- DOM manipulation with JavaScript
