Document & develop React components without breaking a sweat

x0

Document & develop React components without breaking a sweat.

npm install -g @compositor/x0

Features

Zero-config
No plugins
Components over configuration
Use markdown, MDX, or React components
Automatic file system based routing
Completely customizable
Export static sites
Works as an isolated development environment

Getting Started

x0 renders a directory of React components, automatically handling routing based on filename.
Create a docs folder and add an index.js file.

// index.js
import React from 'react'

export default class extends React.Component {
  render () {
    return (
      <h1>Hello</h1>
    )
  }
}

Start a development server by running:

x0 docs --open

To add more pages, add a new component for each route. For example, create an about page:

// about.js
import React from 'react'

export default props =>
  <h1>About</h1>

The about page should now render when navigating to  <http://localhost:8080/about>.

Isolated development environment

x0 docs

Options:

-o --open       Open dev server in default browser
-p --port       Custom port for dev server
-t --template   Path to custom HTML template
--webpack       Path to custom webpack configuration

x0 docs -op 8080

Static Build

Export static HTML and client-side bundle

x0 build docs

Export static HTML without bundle

x0 build docs --static

Options

-d --out-dir    Output directory (default dist)
-s --static     Output static HTML without JS bundle
-t --template   Path to custom HTML template
--webpack       Path to custom webpack configuration

Fetching Data

Use the async getInitialProps static method to fetch data for static rendering.
This method was inspired by [Next.js][nextjs].

const Index = props => (
  <h1>Hello {props.data}</h1>
)

Index.getInitialProps = async () => {
  const fetch = require('isomorphic-fetch')
  const res = await fetch('http://example.com/data')
  const data = await res.json()

  return { data }
}

Custom App

A custom App component can be provided by including an _app.js file.
The App component uses the render props pattern to provide additional state and props to its child routes.

// example _app.js
import React from 'react'

export default class extends React.Component {
  state = {
    count: 0
  }

  update = fn => this.setState(fn)

  render () {
    const { render, routes } = this.props

    return render({
      ...this.state,
      decrement: () => this.update(s => ({ count: s.count - 1 })),
      increment: () => this.update(s => ({ count: s.count + 1 }))
    })
  }
}

Layouts

The App component can also be used to provide a common layout for all routes.

// example _app.js
import React from 'react'
import Nav from '../components/Nav'
import Header from '../components/Header'
import Footer from '../components/Footer'

export default class extends React.Component {
  render () {
    const {
      location,
      render,
      routes
    } = this.props

    const route = routes.find(route => route.path === location.pathname)

    return (
      <React.Fragment>
        <Nav />
        <Header
          route={route}
        />
        {render()}
        <Footer />
      </React.Fragment>
    )
  }
}

CSS-in-JS

x0 supports server-side rendering for [styled-components][sc] and [emotion][emotion] with zero configuration.

Styled Components

To enable CSS rendering for static export, ensure that styled-components is installed as a dependency in your package.json

"dependencies": {
  "styled-components": "^3.2.6"
}

Emotion

Ensure emotion is installed as a dependency in your package.json

"dependencies": {
  "emotion": "^9.1.3"
}

Configuration

Default options can be set in the x0 field in package.json.

"x0": {
  "static": true,
  "outDir": "site",
  "title": "Hello",
}

Head content

Head elements such as <title>, <meta>, and <style> can be configured with the x0 field in package.json.

"x0": {
  "title": "My Site",
  "meta": [
    { "name": "twitter:card", "content": "summary" }
    { "name": "twitter:image", "content": "kitten.png" }
  ],
  "links": [
    {
      "rel": "stylesheet",
      "href": "https://fonts.googleapis.com/css?family=Roboto"
    }
  ]
}

Custom HTML Template

A custom HTML template can be passed as the template option.

"x0": {
  "template": "./html.js"
}

// example template
module.exports = ({
  html,
  css,
  scripts,
  title,
  meta = [],
  links = [],
  static: isStatic
}) => `<!DOCTYPE html>
<head>
  <title>{title}</title>
  ${css}
</head>
<div id=root>${html}</div>
${scripts}
`

Routing

x0 creates routes based on the file system, using [react-router][react-router].
To set the base URL for static builds, use the basename option.

"x0": {
  "basename": "/my-site"
}

Links

To link between different components, install react-router-dom and use the Link component.

npm i react-router-dom

import React from 'react'
import { Link } from 'react-router-dom'

export default () => (
  <div>
    <h1>Home</h1>
    <nav>
      <Link to='/'>Home</Link>
      <Link to='/about'>About</Link>
    </nav>
  </div>
)

JSX Format

x0 includes support for the Compositor JSX file format.

---
title: Hello
---
import { Box, Heading } from 'rebass'

<Box px={2} py={4}>
  <Heading>
    {frontMatter.title}
  </Heading>
</Box>

MDX Format

x0 includes support for the MDX file format.

import { Box } from 'rebass'

# Hello MDX

<Box p={4} bg='tomato'>
  Beep Boop
</Box>

webpack

Webpack configuration files named webpack.config.js will automatically be merged with the built-in configuration, using webpack-merge.
To use a custom filename, pass the file path to the --webpack flag.

// webpack.config.js example
module.exports = {
  module: {
    rules: [
      { test: /\.txt$/, loader: 'raw-loader' }
    ]
  }
}

See the example.

x0