Add styletron example (#486)

nkzawa · impronunciable · commit 01da6f476140 · 2016-12-23T08:01:24.000-05:00
* add styletron example

* example: fix link

* example: improve README

* Added styletron example reference to readme and merge with master
diff --git a/README.md b/README.md
@@ -93,6 +93,14 @@ export default () => (
 
 #### CSS-in-JS
 
+<p><details>
+  <summary><b>Examples</b></summary>
+  <ul>
+		<li><a href="./examples/with-styled-components">Styled components</a></li>
+		<li><a href="./examples/with-styletron">Styletron</a></li>
+	</ul>
+</details></p>
+
 It's possible to use any existing CSS-in-JS solution. The simplest one is inline styles:
 
 ```jsx
diff --git a/examples/with-styletron/README.md b/examples/with-styletron/README.md
@@ -0,0 +1,30 @@
+
+# Example app with styletron
+
+## How to use
+
+Download the example (or clone the repo)[https://github.com/zeit/next.js.git]:
+
+```bash
+curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-styletron
+cd with-styletron
+```
+
+Install it and run:
+
+```bash
+npm install
+npm run dev
+```
+
+Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
+
+```bash
+now
+```
+
+## The idea behind the example
+
+This example features how yo use a different styling solution than [styled-jsx](https://github.com/zeit/styled-jsx) that also supports universal styles. That means we can serve the required styles for the first render within the HTML and then load the rest in the client. In this case we are using [styletron](https://github.com/rtsao/styletron).
+
+For this purpose we are extending the `<Document />` and injecting the server side rendered styles into the `<head>`.
diff --git a/examples/with-styletron/layout.js b/examples/with-styletron/layout.js
@@ -0,0 +1,8 @@
+import { StyletronProvider } from 'styletron-react'
+import getStyletron from './styletron'
+
+export default ({ children }) => (
+  <StyletronProvider styletron={getStyletron()}>
+    {children}
+  </StyletronProvider>
+)
diff --git a/examples/with-styletron/next.config.js b/examples/with-styletron/next.config.js
@@ -0,0 +1,7 @@
+module.exports = {
+  webpack: function (config) {
+    config.externals = config.externals || {}
+    config.externals['styletron-server'] = 'styletron-server'
+    return config
+  }
+}
diff --git a/examples/with-styletron/package.json b/examples/with-styletron/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "with-styletron",
+  "version": "1.0.0",
+  "scripts": {
+    "dev": "next",
+    "build": "next build",
+    "start": "next start"
+  },
+  "dependencies": {
+    "next": "^2.0.0-beta",
+    "styletron-client": "^2.2.0",
+    "styletron-react": "^2.2.1",
+    "styletron-server": "^2.2.0"
+  }
+}
diff --git a/examples/with-styletron/pages/_document.js b/examples/with-styletron/pages/_document.js
@@ -0,0 +1,26 @@
+import Document, { Head, Main, NextScript } from 'next/document'
+import { flush } from '../styletron'
+
+export default class MyDocument extends Document {
+  static getInitialProps ({ renderPage }) {
+    const page = renderPage()
+    const styletron = flush()
+    const css = styletron ? styletron.getCss() : null
+    return { ...page, css }
+  }
+
+  render () {
+    return (
+      <html>
+        <Head>
+          <title>My page</title>
+          <style className='_styletron_hydrate_' dangerouslySetInnerHTML={{ __html: this.props.css }} />
+        </Head>
+        <body>
+          <Main />
+          <NextScript />
+        </body>
+      </html>
+    )
+  }
+}
diff --git a/examples/with-styletron/pages/index.js b/examples/with-styletron/pages/index.js
@@ -0,0 +1,13 @@
+import { styled } from 'styletron-react'
+import Page from '../layout'
+
+const Title = styled('div', {
+  color: 'red',
+  fontSize: '50px'
+})
+
+export default () => (
+  <Page>
+    <Title>My page</Title>
+  </Page>
+)
diff --git a/examples/with-styletron/styletron.js b/examples/with-styletron/styletron.js
@@ -0,0 +1,23 @@
+
+const isServer = typeof window === 'undefined'
+
+let styletron
+
+export default function getStyletron () {
+  if (isServer) {
+    const Styletron = require('styletron-server')
+    styletron = new Styletron()
+  } else if (!styletron) {
+    const Styletron = require('styletron-client')
+    const styleElements = document.getElementsByClassName('_styletron_hydrate_')
+    styletron = new Styletron(styleElements)
+  }
+
+  return styletron
+}
+
+export function flush () {
+  const _styletron = styletron
+  styletron = null
+  return _styletron
+}
