mirror of https://github.com/status-im/web3.js.git
44 lines
1.6 KiB
ReStructuredText
44 lines
1.6 KiB
ReStructuredText
===============
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Getting Started
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===============
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The web3.js library is a collection of modules which contain specific functionality for the ethereum ecosystem.
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- The ``web3-eth`` is for the ethereum blockchain and smart contracts
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- The ``web3-shh`` is for the whisper protocol to communicate p2p and broadcast
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- The ``web3-bzz`` is for the swarm protocol, the decentralized file storage
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The following page will describe how to install and add web3.js to your project.
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You can find some extra examples in the :ref:`API-reference <api-reference>` and the `examples here <https://github.com/ethereum/web3.js/tree/master/examples>`_.
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Please also check out these `useful patterns <https://github.com/ethereum/wiki/wiki/Useful-Ðapp-Patterns>`_ for building Ðapp.
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.. _adding-web3:
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Adding web3.js
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==============
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.. index:: npm
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.. index:: bower
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.. index:: meteor
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First you need to get web3.js into your project. This can be done using the following methods:
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- npm: ``npm install web3``
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- bower: ``bower install web3``
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- meteor: ``meteor add ethereum:web3``
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- pure js: link the ``dist/web3.min.js``
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After that you need to create a web3 instance and set a provider.
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Ethereum supported Browsers like Mist or MetaMask will have a ``ethereumProvider`` available, web3.js is setting this one to ``Web3.givenProvider``.
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If this property is ``null`` you need to connect to a remote/local node.
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.. code-block:: javascript
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// in node.js use: var Web3 = require('web3');
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var web3 = new Web3(Web3.givenProvider || new Web3.providers.WebsocketProvider("ws://localhost:8546"));
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Thats it! now you can use the ``web3`` object.
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