mirror of
https://github.com/embarklabs/web3.js.git
synced 2026-08-31 06:31:19 +00:00
42 lines
1.3 KiB
ReStructuredText
42 lines
1.3 KiB
ReStructuredText
|
|
.. include:: include_announcement.rst
|
|
|
|
===============
|
|
Getting Started
|
|
===============
|
|
|
|
The web3.js library is a collection of modules which contain specific functionality for the ethereum ecosystem.
|
|
|
|
- The ``web3-eth`` is for the ethereum blockchain and smart contracts
|
|
- The ``web3-shh`` is for the whisper protocol to communicate p2p and broadcast
|
|
- The ``web3-bzz`` is for the swarm protocol, the decentralized file storage
|
|
- The ``web3-utils`` contains useful helper functions for Dapp developers.
|
|
|
|
|
|
.. _adding-web3:
|
|
|
|
Adding web3.js
|
|
==============
|
|
|
|
.. index:: npm
|
|
.. index:: bower
|
|
.. index:: meteor
|
|
|
|
First you need to get web3.js into your project. This can be done using the following methods:
|
|
|
|
- npm: ``npm install web3``
|
|
- meteor: ``meteor add ethereum:web3``
|
|
- pure js: link the ``dist/web3.min.js``
|
|
|
|
After that you need to create a web3 instance and set a provider.
|
|
Ethereum supported Browsers like Mist or MetaMask will have a ``ethereumProvider`` or ``web3.currentProvider`` available, web3.js is setting this one to ``Web3.givenProvider``.
|
|
If this property is ``null`` you need to connect to a remote/local node.
|
|
|
|
.. code-block:: javascript
|
|
|
|
// in node.js use: var Web3 = require('web3');
|
|
|
|
var web3 = new Web3(Web3.givenProvider || "ws://localhost:8546");
|
|
|
|
That's it! now you can use the ``web3`` object.
|