How to Begin with JavaScript in second half of 2022?

How to Begin with JavaScript in second half of 2022?

Have you ever wondered how websites work, or how it differs from Java?

Assume you visit a website and open it; now everything you see, such as animations, buttons, links, a search bar, a navigation bar, and so on, is visible. These modifications are the result of a developer's JavaScript expertise.

Technically, almost every website we interact with now uses JavaScript.

This article is for you if you are new to JavaScript and want to learn more about it.

Let us begin!

What exactly is JavaScript?

JavaScript is an ECMAScript-compliant high-level interpreted programming language. It's commonly shortened as JS. Also mentioned are this language's dynamic, multi-paradigm, prototype-based, and weakly defined properties.

Let us dissect this.

  1. It is used to produce both client-side and server-side dynamic pages.
  2. It is a cross-platform, open-source language.

The most basic JavaScript code might look something like this:

Sample Code

<script>
    console.log("Welcome to Samir Malek's Blog on Hashnode");
</script>

Output

Welcome to Samir Malek’s Blog on Hashnode

JavaScript simply adds dynamic content to websites to make them look better. HTML work on the appearance of the website without the interactive effects and everything.

Because it has a wide range of applications, JavaScript can be used in a variety of ways:

  • Using the console tab of web browsers
  • Making Use of Node.js
  • By building web pages

How to Learn JavaScript: Prerequisites

To begin learning JavaScript, you must first comprehend the fundamentals of HTML and CSS, both of which are very easy to learn. This knowledge will suffice for the majority of web-based tasks, as will a solid understanding of JavaScript. For more advanced projects and skills, it is desired that you are familiar with fundamental OOPs fundamentals and a programming language with an OOP foundation (like Java).

JavaScript VS JAVA

js-vs-java.png

Java and JavaScript are comparable to cars and carpets, respectively.

The debate between Java and JavaScript has gained a lot of attention recently.

Let's untangle this mess right now!

The majority of people believe that Java and JavaScript are interchangeable. The word "Java" appears in the name of JavaScript, so many people believe that Java and JavaScript are somehow connected. Although both are programming or scripting languages, which programmers use for a variety of tasks, their similarities end with "Java."

DIFFERENCES

Because it is executed by the Java Virtual Machine, the Object-Oriented Programming language Java is platform-independent (JVM). Moreover, JavaScript, an object-oriented scripting language, aids in the development of dynamic HTML pages.

java-vs-javascript.jpg

SIMILARITIES

Did you know that Java and JavaScript are the most commonly used languages for developing web applications?

JavaScript, which is injected into HTML directly, is used as a toolkit or library for front-end development, whereas Java can be used to make visually appealing front ends using Java applets.

Developers have supported back-end frameworks like JBoss, WebSphere, and Apache using Java. The infrastructure required for back-end development to support JavaScript services is provided by NodeJS.

What Is NodeJS?

Untitled.png

As JVM is to Java, Node.js is to JavaScript.

For creating back-end services like APIs for Web apps or mobile apps, we frequently use Node.js. Large corporations like PayPal, Uber, Netflix, Walmart, and others use it during production.

Node.js is operated by the JavaScript runtime engine V8. This engine converts the JavaScript code you provide into useful machine code. Computers are capable of directly executing low-level code, also known as machine code, without the need for prior interpretation.

JAVASCRIPT IS USED BY THESE FEW TECH GIANTS.

  • PayPal
  • Netflix
  • Groupon
  • Uber
  • eBay
  • Google
  • Facebook

CONCLUSION

That concludes your introduction to the world of JavaScript.

We've only covered the introduction so far, but in the upcoming posts, titled "JavaScript#02 - Basics," we'll start with the fundamentals of the language, including variables, comments, conditional expressions, loops, and functions. From there, we'll gradually move on to more complex topics like hoisting, closure, and much more.

Please feel free to ask any questions you may have in the comments section below.

Have fun learning!