web3.js

Lesson in the Blockchain Roadmap · Stage 10: dApps

Last updated 14 September 2026

What is web3.js?

web3.js is a collection of JavaScript libraries that allows you to interact with a local or remote Ethereum node using HTTP, WebSocket, or IPC. It provides a set of functions to interact with smart contracts on the Ethereum blockchain, send transactions, read blockchain data, and manage Ethereum accounts. Essentially, it acts as a bridge between your JavaScript application and the Ethereum network.

Study this in the interactive course See the whole Blockchain roadmap

Free resources to learn web3.js

Official docsWeb3.js Documentation
FeedExplore top posts about Web3

web3.js: common questions

Can I learn web3.js in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain web3.js in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this web3.js tutorial for beginners?

It is lesson 100 of 127 in the free Blockchain roadmap, in stage 10, dApps. If you are new to Blockchain, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.