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Javascript API and library for Ethereum To develop applications on Ethereum, you can use the web3 object provided by the web3.js library. Under the hood it communicates to a local node through RPC calls. web3.js works with any Ethereum node, which exposes an RPC layer. https://github.com/ethereum/wiki/wiki/JavaScript-API

To develop applications on Ethereum, you can use the web3 object provided by the web3.js library. Under the hood it communicates to a local node through RPC calls. web3.js works with any Ethereum node, which exposes an RPC layer.

https://github.com/ethereum/wiki/wiki/JavaScript-API

The tag should be for version-agnostic questions only, but many past questions will mean web3js-v0.x

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Code Language (used for syntax highlighting): lang-js