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https://github.com/ReactTraining/react-stdio

Render React.js components on any backend
https://github.com/ReactTraining/react-stdio

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Render React.js components on any backend

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# react-stdio [![Travis][build-badge]][build] [![npm package][npm-badge]][npm]



[build-badge]: https://img.shields.io/travis/ReactTraining/react-stdio/master.svg?style=flat-square

[build]: https://travis-ci.org/ReactTraining/react-stdio

[npm-badge]: https://img.shields.io/npm/v/react-stdio.svg?style=flat-square

[npm]: https://www.npmjs.org/package/react-stdio



[react-stdio](https://npmjs.org/package/react-stdio) lets you render [React](https://reactjs.org/) components on the server, regardless of the backend technology you're using.



As its name suggests, other processes communicate with react-stdio using standard streams. The protocol is JSON, so any environment that can spawn a child process and write JSON to its stdin can use the server. Requests are handled serially, so responses are issued in the same order requests are received.



## Installation



If you have node installed, you can install using npm:



    $ npm install -g react-stdio



This will put the `react-stdio` executable in your [`npm bin`](https://docs.npmjs.com/cli/bin).



If you don't have node installed, you can download the executable for your architecture from [the releases page](https://github.com/ReactTraining/react-stdio/releases).



## Usage



After installation, execute `react-stdio` to start the server.



To render a React component, write a JSON blob to stdin with any of the following properties:



    component       The path to a file that exports a React component (required)

    props           Any props you want to pass to the component (optional, default is {})

    render          The type of rendering (optional, default is renderToString)



If the request is successful, the server will put a JSON blob with `{"html":"...","context":...}` on stdout. If the request fails for some reason, the JSON will have an `error` property instead of `html`.



Example:



    $ echo '{"component":"./MyComponent","props":{"message":"hello"}}' | react-stdio



If you'd like to use a render method other than [`renderToString`](https://facebook.github.io/react/docs/top-level-api.html#reactdomserver.rendertostring) or [`renderToStaticMarkup`](https://facebook.github.io/react/docs/top-level-api.html#reactdomserver.rendertostaticmarkup) you can pass a path to a file that exports your rendering function. The signature of your `render` function should be:



```js

function render(element, callback) {

  // ...

}

```



This function is asynchronous so you have time to do data fetching before you render if you wish. Call `callback(error, html)` when you're finished.



## Environment



Your component file is loaded in a vanilla node.js environment. If you need additional code transforms to run (e.g. using webpack or Browserify) you should create your bundle first and tell react-stdio to load your bundle instead of the plain component file. If you're using webpack to build your bundle, you'll want to use `"libraryTarget": "commonjs2"` in your config so the bundle exports the component using `module.exports = MyComponent`.



Also, since react-stdio uses the `stdout` stream for all program output, all writes your code makes to `process.stdout` (including `console.log` statements) are redirected to `process.stderr`.



## Integrations



* [Elixir/Phoenix](http://blog.overstuffedgorilla.com/render-react-with-phoenix/)

* [Ruby on Rails](https://github.com/aaronvb/rails_react_stdio)



If you'd like to add an integration here, please submit a PR.



## About



react-stdio is developed and maintained by [React Training](https://reacttraining.com). If you're interested in learning more about what React can do for your company, please [get in touch](mailto:[email protected])!