path: root/packages/website/md/docs/0xjs/0.0.1/introduction.md

Welcome to the [0x.js](https://github.com/0xProject/0x-monorepo) documentation! 0x.js is a Javascript library for interacting with the 0x protocol. With it, you can easily make calls to the 0x smart contracts as well as any ERC20 token. Functionality includes generating, signing, filling and cancelling orders, verifying an orders signature, setting or checking a users ERC20 token balance/allowance and much more.