What exactly are JavaScript and Web3.js? What Is No One Talking About? Correct Define- 2022

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Today, blockchain and Web3 are all the rage, with dApps taking center stage, attracting attention from users and Javascript developers alike. We are in an exciting new frontier where decentralized applications can be created. 

The result is an explosion of creativity, and numerous decentralized applications or dApps making headway into many different industries – fintech first and foremost, but also identity, insurance, intellectual property, the arts, and others. 

The demand for blockchain, Web3, and dApp skills is at an all-time high. And one of the keys to entering this brave new world of decentralized invention is knowledge of one ubiquitous language: 

JavaScript. To make the most out of the new opportunities ushered in by this new development landscape, devs should understand how to use Web3 with JavaScript and “Web3.js”. 

So, what is JavaScript? If you are an experienced developer with a track record of building websites from scratch using HTML, CSS, and JS, then you are no stranger to the wide applications of this scripting language. 

It is a standard part of any experienced web developer’s toolkit. However, if you are a beginner, you will find that learning JavaScript is one of the key foundations for starting a programming or web development career. 

Beyond the development of websites, it also opens doors to more career opportunities leading to the internet trend of the future: Web3. We’ve previously answered the question “What is Web3?” in another comprehensive guide.

Already interested in blockchain? Find new ways to create and interact with blockchain platforms using Web3 JavaScript or Web3.js, a library that allows you to connect apps and run off-chain smart contracts asynchronously with well-known blockchains like Ethereum. 

Web3.js is an important part of the blockchain and smart contract ecosystem, allowing dApps to interact with blockchain networks.

What Is the Difference Between JavaScript and Web3.js?

What Are JavaScript And Web3.js?

No matter where you are in your programming or development career, JavaScript is an immensely useful tool for you. 

As a beginner interested in learning JavaScript, you will need to understand what it is, what it’s used for, and where it fits in your skillset or stack, should you decide to use it.

JavaScript fits into a three-tiered stack needed to develop or create websites. Think of it as three steps on a ladder or three layers on a cake. You can even imagine them as three legs, as in a tripod. 

These layers work together in web design. Before we move onto Web3.js, let us first look at the three basic layers of web design.

Three Web Design Layers

The first layer is HTML. HTML, or Hypertext Markup Language, is often referred to as the “structure layer”. HTML creates a framework for the site. It is the initial step where all the user content is stored. It can be made up of both images and text. It also consists of hyperlinks used for navigation.

Three Layers Of Web Design

The second layer is the styling layer. It controls the look or appearance of your site. The language used for this is CSS or Cascading Style Sheets. CSS instructs how the content is displayed on a browser and is used to add style and do layouts on a web page. 

With CSS, you can do more than just post plain text and information. Some of these functions include customizing fonts and adjusting the entire appearance of your content, from spacing to the number of columns to adding other illustrative features to make it more user-friendly. CSS is important for creating the visual frame and can be used to adapt to different screen sizes.

The third layer of web design is – you guessed it – JavaScript. JavaScript breathes life into a website. It is the behavioral layer that adds interactivity. 

What do we mean by this? After the site has its basic framework, you’re ready to dress it up – to put in the features that make the experience truly richer for the user. Beyond HTML and CSS, this language lets you transform the content into something more dynamic. 

Interactivity in JavaScript

JavaScript offers greater breadth and versatility, lets you add and control multimedia, and allows you to update your content interactively. 

JavaScript Interactivity

It also allows you to animate your images and offers a great deal more flexibility than the previous two. It’s important to note that all three languages complement each other and can be built on top of one another without issues.

Now that you have the basic answer to “What is JavaScript?” and have an idea of its most common uses, you’re ready to move on towards 

understanding Web3 development with JavaScript and Web3.js.

How Do You Use JavaScript?

JavaScript, or JS, is an example of a scripting language. What does that mean? It means that it is used for automation to free users of things they will otherwise have to do themselves in a series of steps. 

It eliminates the need to manually reload a web page. It tells a website or application to perform a task, thereby doing most of the legwork. It instructs images to move or animate, so it appears that these things are happening spontaneously or independently. 

How To Use JavaScript?

In summary, with JavaScript you can:

  • Develop mobile apps
  • Build browser-based games
  • Go beyond static and make websites more interactive

If you are further along or more advanced with some experience in blockchain or Web3, Web3 JavaScript is integral to your skillset. It can: 

  • Do other things on decentralized platforms. It allows users or software that is off-chain to interact with the blockchain by relaying the transaction to on-chain components (more on this later.)

You can type the commands directly into HTML, requiring no additional compilers and programs.

Web3.js Unveils A New World Of Possibilities

Web3.js Opens up a World of Discovery

If you are an experienced developer looking to jumpstart your career and take advantage of the innovations in today’s web, learning Web3 JavaScript or Web3.js is the way to go. 

Many buzzwords are being thrown around, like blockchain, smart contracts, Web3, and apps. To make sense of these new trends, you first need to understand these concepts which are built around the idea of decentralization.

 Later on, you will learn how to use Web3 with JavaScript.

How to Make Use of Web3 with JavaScript

By now, you should be curious about how to use Web3 with JavaScript. This is relevant in the second aspect of developing for and working with blockchains, which is building applications that interact with them. How is this made possible? It is done through Web3 JavaScript or Web3.js. 

How to Use Web3 with JavaScript

What is Web3.js? It is a collection of libraries that provides devs with a way to interact with the main blockchain. It allows you to connect with Ethereum nodes. For example, if you create off-chain software or an app that needs to transact on the blockchain, you will need Web3.js to facilitate the connection with a node, which then relays your transaction to the network

The process by which a node receives such information and relays it to the network will not be covered by this article, but you can learn more by enrolling in courses like the ones Ivan on Tech Academy offers for blockchain and Ethereum dApp programming.

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