Web3.js
The individual description of web3 and JS serves as an important highlight for understanding the JavaScript web3 connection. However, you must also understand the web3.js library, which you can use for different functions. First of all, you need to note the distinct highlights for developing blockchain applications through the Ethereum blockchain. The important functions in developing Ethereum-based blockchain applications include smart contract development and website development. Smart contract development is essential for crafting code with a Solidity programming language, which you would deploy on the blockchain.
On the other hand, you must also develop websites that can interact with the blockchain. The websites or clients would involve code that could read and write data from the blockchain through smart contracts.
Web3.js can help you address the second important function in developing Ethereum-based blockchain applications. The answers to “What is Web3 used for?” would draw attention toward the development of clients or websites for interacting with the Ethereum blockchain. Web3.js is practically a collection of libraries that can help in performing different actions on Ethereum applications. Examples of actions could include sending Ether between accounts, creating smart contracts and reading and writing data from smart contracts.
Working of Web3.js
The obvious thing on your mind right now must be pointed at the Web3 JS Github entries for some practical knowledge. However, you need to learn how web3.js works before you start working on dApps or smart contracts. Any web development expert would choose jQuery for making Ajax calls to a web server. However, you can choose web3.js as an alternative for reading and writing to the Ethereum blockchain. You can learn more about the working of Web3.js by understanding how it talks to the Ethereum blockchain.
The explanations for “What is Web3 JavaScript?” would draw attention toward the working of web3.js in enabling communication between clients and the Ethereum blockchain. Web3.js communicates with the Ethereum blockchain by using the JSON-RPC method or a Remote Procedure Call protocol. Ethereum is a decentralized peer-to-peer network of nodes storing a copy of all the data and smart contract code on the blockchain itself. Now, web3.js could help in making requests to individual Ethereum nodes by leveraging JSON-RPC for reading and writing data to the blockchain network. You can think of it as implementing jQuery in JSON API for reading and writing data on a web server.