Web 3.0, also known as Web 3, is now a promising area of application development. Because the concept of decentralized semantic web has been introduced into the third generation web. Therefore, for blockchain developers, using tools such as web3.js becomes critical. Through in-depth explanation of the web3.js tutorial, you may be able to determine the most effective way to develop decentralized programs using JavaScript. In the following article, you can learn more about web3.js.

What are JS and Web3?

In short, Web3.js is defined as a JavaScript library that can be used to connect the Ethereum blockchain. First, you need to be familiar with the terms: "web3" and "js". Web3 development practice is similar to web2 development practice, and novices should learn this. As an option, it can use programming languages such as JavaScript, which is also frequently used in web2 development technology.

However, before studying web3 JavaScript courses or guides, if you are new to the programming field, you must understand web3 and JS. The ability to use JavaScript programming provides developers with a solid knowledge base and a flexible way to get started. For various reasons, including many experts who have given their own definitions, it is difficult to define web3.

A typical view of web3 is that it represents a stage of web development. The web1 and web2 era of the Internet has brought new and efficient ways to browse the Internet. In the web1 era of the Internet, users can only access static web pages without interactive functions. With the emergence of social media and e-commerce websites, web2 was born. Despite concerns about centralization, Web2 is still the guiding ideology of the whole website.

Dynamic online experience is very good, but the centrality of web2 has led to criticism of this technology. For example, the loss of privacy and transparency is one of the negative effects of decentralization. Due to single point of failure, centralization will also bring serious security problems. Web3 tries to solve these problems by using blockchain technology and decentralization. After reading the above content, you should have understood the meaning of web3 in JavaScript. So why choose web3.js?

Let's briefly introduce JavaScript first. This is an object-oriented programming language, which is very suitable for creating websites. As one of the commonly used tools in web2 development, JavaScript provides excellent functions for web3 development. For example, because it can update CSS and HTML code, it is called the "third layer" of the web. The ability to integrate interactive components into web pages and applications is another feature of JavaScript. Most importantly, JavaScript has a text-based design that simplifies language learning and use. Therefore, the features of JavaScript can promote user participation by achieving more complex user experience.

Meaning of Web3.js

Understanding JavaScript web3 connections depends largely on the separate descriptions of web3 and JS. However, you should also be familiar with the web3.js library because it has many purposes. You must first understand the main advantages of using Ethereum blockchain to create blockchain applications. Creating websites and smart contracts is critical to creating blockchain applications based on Ethereum. Creating code in Solidity programming language and publishing it on blockchain requires smart contract development.

However, it is also necessary to create a website that can communicate with the blockchain. Web sites or clients that enable smart contracts will have code that can read and write data from the blockchain. When creating blockchain applications based on Ethereum, you can use Web3.js to handle the second key task.

The answer to the question "What is Web3 used for?" will focus on creating software or online platforms to interact with the Ethereum blockchain. Web3.js is a collection of libraries that can be used to complete various tasks on Ethereum applications. Sending Ethernet between accounts, signing smart contracts, reading and writing data from accounts are all examples of actions.

Functions of Web3.js

For this point, you can check the Web3 JS Github entry to get some useful information. Before using dApps or smart contracts, it is best to understand how web3.js works in advance. Most web development experts will choose jQuery to send Ajax requests to the web server. Web3.js is an option that can be used to read and write the Ethereum blockchain.

Learn how the focus of web3.js is to realize the communication between the client and the Ethereum blockchain. Web3.js uses JSON-RPC technology or remote procedure call protocol to interface with Ethereum blockchain. Ethereum is a decentralized point-to-point node network, which stores the data of the entire blockchain and copies of smart contract codes. Now, JSON-RPC is used to read and write data to the blockchain network, and web3.js can help send requests to specific Ethereum nodes. Reading and writing data on the web server can be compared to implementing jQuery in the JSON API.

conclusion

Web3.js is a library collection that allows developers to interact with remote or local Ethereum nodes using HTTP, IPC or WebSocket. Using this library, you can develop websites or clients that interact with blockchain. This can be like sending Ethernet from one user to another, checking data from smart contracts, creating smart contracts, and other operations. Web3.js helps make the process of running and selecting nodes participating in the Ethereum network simpler and easier to master.