Web3.js
Web3.js is a JavaScript library that allows developers to interact with Ethereum blockchains and smart contracts. It provides a set of APIs for reading blockchain data, sending transactions, and deploying contracts, enabling the creation of decentralized applications (dApps) that run on the Ethereum network. The library acts as a bridge between web-based frontends and the Ethereum blockchain, handling tasks like account management and contract interaction.
Developers should learn Web3.js when building dApps that require direct interaction with the Ethereum blockchain, such as decentralized finance (DeFi) platforms, NFT marketplaces, or blockchain-based games. It is essential for integrating Ethereum functionality into web applications, as it simplifies complex blockchain operations like transaction signing and smart contract calls, making it a core tool for Ethereum development.