---
### [0x.js documentation][docs-url]
[0x][website-url] is an open protocol that facilitates trustless, low friction exchange of Ethereum-based assets. A full description of the protocol may be found in our [whitepaper][whitepaper-url].
This repository contains a Javascript library that makes it easy to build Relayers and other DApps that use the 0x protocol.
[](https://circleci.com/gh/0xProject/0x.js)
[](https://coveralls.io/github/0xProject/0x.js?branch=master)
[](http://slack.0xProject.com)
[](https://gitter.im/0xProject/contracts?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
[](https://opensource.org/licenses/Apache-2.0)
## Installation
0x.js ships as both a [UMD](https://github.com/umdjs/umd) module and a [CommonJS](https://en.wikipedia.org/wiki/CommonJS) package.
#### CommonJS *(recommended)*:
**Install**
```bash
npm install 0x.js --save
```
**Import**
```javascript
import {ZeroEx} from '0x.js';
```
#### UMD:
**Install**
Download the UMD module from our [releases page](https://github.com/0xProject/0x.js/releases) and add it to your project.
**Import**
```html
```
### [Visit the 0x.js documentation][docs-url]
[website-url]: https://0xproject.com/
[whitepaper-url]: https://0xproject.com/pdfs/0x_white_paper.pdf
[docs-url]: https://0xproject.com/docs/0xjs