####Work in progress!

Vapor-js

A server-side renderer for segmented React applications with built-in Redux support.

Installation

yarn add vapor-js

Using Vapor

Vapor allows you to easily break a large React application into smaller, more manageable apps, which can have a big effect on performance.

API

`createVapor`

Accepts a config object and returns an object with two methods, build and exists.

Usage:

import createVapor from 'vapor-js'

const vapor = createVapor(options)

Returns:

{
    build: Function,
    exists: Function
}

Options

Options should be an object of the following shape (details below):

{
    components: Object,
    componentReducer?: Function,
    store?: Object,
    template?: string
}

`components`

An object lookup table for your components. Each property should be either a valid React component or a object of the following shape:

{
    component: Function,
    store?: Object,
    template?: string
}

Example:

const components = {
    Landing: require('../Landing'),
    Feed: {
        store: feedStore,
        template: feedTemplate,
        component: require('../Feed')
    }
}

`componentReducer`

A function that accepts a single object parameter with component, store, and props properties. The function should check the value of component to determine which state to prepare for your app's initial render.

The easiest way to prepare your state is to dispatch actions with values from props (props should be generated on the server before calling vapor.build).

The API is shown below, actual implementation is up to you:

({ component, store, props }) => state

Example

The easiest way is to use a switch/case statement:

function componentReducer ({ component, store, props }) {
    switch (component) {
        case 'Feed':
            store.dispatch(fetchFeedSuccess({ feed: props.feed }))
            return store.getState()
    }
}

Using a lookup table can reduce boilerplate:

const Feed = ({ store: { dispatch, getState }, props }) => {
    dispatch(fetchFeedSuccess({ feed: props.feed }))
    return getState()
}
const componentReducer = ({ component, store, props }) => ({ Feed })[component]({ store, props })

`store`

A global Redux store, useful for when multiple components need to share state. If a component has a store property the global store is ignored.

`template`

A global HTML template for rendering your applications into. If a component has a template property the global template is ignored.

Basic Server Example:

import express from 'express'
import vapor from './vaporSetup'

const app = express()
const port = 8080

app.use(express.static('path/to/assets'))

app.get('/', async (req, res) => {
  const component = 'Landing'
  
  if (!vapor.exists({ component })) {
    res.status(404)
    res.send('Oopsie...')
    return
  }
  
  const props = await request(options)
  const initialRender = vapor.build({ component, props })
  
  res.send(initialRender)
})

app.listen(port, () => { console.log(`Server listening on ${port}`) })

HoosLab/vapor-js