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web3.js has moved from 0.x.x to 1.x.x. This is a majore refactor, please read the following guide to update your dapp.

web3.js - Ethereum JavaScript API

This is the Ethereum compatible JavaScript API which implements the Generic JSON RPC spec. It's available on npm as a node module, for bower and component as an embeddable js and as a meteor.js package.

You need to run a local Ethereum node to use this library.

Documentation

Installation

Node.js

npm install web3

Meteor.js

meteor add ethereum:web3

As Browser module

Bower

bower install web3

Component

component install ethereum/web3.js

• Include web3.min.js in your html file. (not required for the meteor package)

Usage

Use the web3 object directly from global namespace:

console.log(web3); // {eth: .., shh: ...} // it's here!

Set a provider (HttpProvider)

web3.setProvider(new web3.providers.HttpProvider('http://localhost:8545'));

There you go, now you can use it:

var coinbase = web3.eth.coinbase;
var balance = web3.eth.getBalance(coinbase);

You can find more examples in example directory.

Documentation

Documentation can be found at read the docs

Requirements

• Node.js
• npm

sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
sudo apt-get install nodejs-legacy

Building (gulp)

npm run-script build

Testing (mocha)

npm test