You can query a node and interact with the Polkadot network using Javascript. This guide describes the Polkadot Javascript API.
You can read more about the Polkadot Network at https://polkadot.network/ and more about the polkadot-js projects at https://polkadot.js.org
You can find the Polkadot repositories at:
- https://github.com/polkadot-js
- https://github.com/paritytech/polkadot
- https://github.com/paritytech/substrate
This documentation is generated from https://github.com/polkadot-js/api
Contribution to the Polkadot JS API are more than welcome. You can report issues and log feature requests.