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 connecting to Ethereum nodes, sending transactions, querying blockchain data, and managing accounts. The library serves as a bridge between web applications and the Ethereum network, enabling decentralized application (dApp) development.
Developers should learn Web3.js when building decentralized applications (dApps) on Ethereum, such as DeFi platforms, NFT marketplaces, or blockchain-based games. It is essential for integrating Ethereum functionality into web frontends, handling wallet connections, and executing smart contract interactions. Use cases include creating user interfaces for token swaps, minting NFTs, or querying on-chain data in real-time.