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The web3.js library is a collection of modules that contain functionality for the ethereum ecosystem.
web3-eth is for the ethereum blockchain and smart contracts.
web3-shh is for the whisper protocol, to communicate p2p and broadcast.
web3-bzz is for the swarm protocol, the decentralized file storage.
web3-utils contains useful helper functions for Dapp developers.
npm: npm install web3
yarn: yarn add web3
pure js: link the dist/web3.min.js
After that you need to create a web3 instance and set a provider.
Most Ethereum-supported browsers like MetaMask have an EIP-1193 compliant provider available at window.ethereum.
For web3.js, check Web3.givenProvider.
If this property is null you should connect to a remote/local node.
// In Node.js use: const Web3 = require('web3');
const web3 = new Web3(Web3.givenProvider || "ws://localhost:8545");
That’s it. I hope you enjoyed the article. If you have questions or queries related to How to install & Configure Web3 JS then feel free to ask in the comment section below, happy to help you.
