renderToStringWithData

A hook for the free and the brave to implement data hydration in SSR and SSG in React.

If you need to have data hydration in SSR and SSG, but you don't want to develop in a heavily opinionated framework, namely Next.js, Gatsby or React Static, this hook is for you.

Features

• Data hydration for SSR and SSG using useContext()

• Isolating server data and client data for hydration(You can also hydrate with the same data if you wish)

• Cache data response in server for performance benefit and development convenience

• No Redux

Code Example

//In your component where you want to hydrate server side
import {
  useServerSideEffect
} from '@blackblock/render-to-string-with-data'

function App(){
  const openSourceData = useServerSideEffect({
    callback: () => {
      return fetch("https://data.weather.gov.hk/weatherAPI/opendata/weather.php?dataType=rhrread")
        .then(response => response.json())
        .catch(e => console.log(e))
    },
    key: 'github', //Unique key for storing data of this request
    clientSideState: {} //initial value for client side
    cacheDuration: 2592000
  })

  return (
    <p>
    {openSourceData.warningMessage}
    </p>
  )
}

//Then in file where you do SSR or SSG:
import {
  renderToStringWithData
} from '@blackblock/render-to-string-with-data/server'

const renderApp = async () => {
  //data is the request data. You can write them to file system as JSON if you need.
  const { data, markupWithData } = await renderToStringWithData(<App />)  
}

Installation

With Npm:

npm install @blackblock/render-to-string-with-data

With Yarn:

yarn add @blackblock/render-to-string-with-data

react and react-dom should be installed in your application, as they are the peer dependencies of this package.

API Reference

<ServerSideEffectProvider>

The followings are the options you can pass to <ServerSideEffectProvider>.

value

value::Object

You need to pass an object in the following structure:

const context = {
  sse: {

  }
}

//then pass this context in renderToString or in place where you use <ServerSideEffectProvider>

renderToString(
  <ServerSideEffectProvider value={context}>
    <App />
  </ServerSideEffectProvider>
)

renderToStringWithData

The followings are the options you can pass to renderToStringWithData.

markup

Your React application. Do not pass in an application with <ServerSideEffectProvider> in it, as renderToStringWithData internally does that for you.

useServerSideEffect

The followings are the options you can pass to useServerSideEffect.

callback

callback::Function

A server side callback to run like useEffect

key

key::String

Key for mutating the context object

clientSideState

clientSideState::Any

The state to take over in client side. It should be treated as initial state.

cacheDuration

cacheDuration::Int | Boolean

cacheDuration is default to false

The duration (in ms) which the promise returned from your callback would be replaced by data cached previously in your file system.

If you set it to false, cache would be disabled for that hook. Setting it to true will always read from the cache.

Inspiration

useSSE