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egg-serlina

NPM version CircleCI npm download

egg-serlina is a Serlina binding for Egg. It brings the best SSR solution to Egg application.

Install

$ npm i serlina egg-serlina react react-dom --save

Usage

Enable the plugin:

// {app_root}/config/plugin.js
exports.serlina = {
  enable: true,
  package: 'egg-serlina',
};

Add a client folder and create the first page:

- app_root
  - app
+ - client
+   - pages
+     - page1.js
// {app_root}/client/pages/page1.js

export default () => {
  return <div>Hello Serlina</div>
}
// {app_root}/config/config.default.js

exports.serlina = {
  map: {
    '/page1': 'page1'
  }
}

Then visit http://{your_host}/page1 and you will see the React page.

Please note that the egg ctx had been injected to your page:

// {app_root}/client/pages/page1.js

export default class Page1 extends React.Component {

  static async getInitialProps({ ctx }) {
    // ctx is egg `ctx`
    return {
      data: await ctx.service.getDate()
    }
  }

  render () {
    return (
      <div>{this.props.data}</div>
    )
  }
}

You can also render your page manually in controller:

// app/controller/page1.js

module.exports = async ctx => {
  const rendered = await ctx.app.serlina.render('/page1', { ctx })
}

Remember to inject your ctx if you need it in getInitialProps.

Configuration

options

dev

boolean dev mode.

default: appInfo.env === 'local'

baseDir

string Serlina baseDir.

default: path.resolve(appInfo.baseDir, './client')

outputPath

string Serlina output files path.

publicPath

string Webpack's publicPath. Only work in prod mode. Usually use it when you upload the Serlina output files to CDN.

default: /public/

map

object Using Serlina only in specific path:

exports.serlina = {
  map: {
    '/p/page1': 'page1' // render SSR page `page1` only when the `ctx.path` is `/p/page1`
  }
}

see config/config.default.js for more detail.

Production deployment

self serve static files

Before deploy to production, please run serlina build first (usually do it on CI):

// ${app_root}/package.json

{
  "script": {
    "build": "serlina build ./client --publicPath /public/"
  }
}

Then you need to serve the output path:

// {app_root}/config/config.default.js
exports.static = {
  dir: [
    path.join(appInfo.baseDir, 'app/public'),
    path.join(appInfo.baseDir, 'client/.serlina')
  ]
};

server static files on CDN

// ${app_root}/package.json

{
  "script": {
    "build": "serlina build ./client --publicPath ${YOUR_CDN_ENDPOINT}"
  }
}
// {app_root}/config/config.default.js
exports.serlina = {
  publicPath: '${YOUR_CND_ENDPOINT}'
};

Limitation

While Egg will restart a new worker after file changing, Serlina will restart building. Maybe it will be frustrating when the client code getting bigger. PR is welcome if you know how to deal with this problem.

License

MIT

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Serlina binding for Egg.js

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