[examples] Update styled-components to use SWC (#34770)

* rename example with-styled-components to with-styled-components-babel * update with-styled-components references * update docs on react hydratation erros for styled components * clone with-styled-components-babel without babel config * add styledComponents to compiler options in next.config * replace babel dependency with Next.js SWC compiler * upgrade example typescript version example with-typescript-styled-components had a typescript dependency lower than the recommended version. Upgraded from 4.2.4 to 4.5.5. * Apply suggestions from code review * update readme for with-styled-components-babel remove Notes section since it describes a workaround which is no longer required to work with `next/link`. Co-authored-by: Lee Robinson <me@leerob.io> Co-authored-by: Balázs Orbán <info@balazsorban.com>
vercel · Mar 2, 2022 · b579a35 · b579a35
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diff --git a/errors/react-hydration-error.md b/errors/react-hydration-error.md
@@ -41,8 +41,9 @@ Common causes with css-in-js libraries:
 
 - When using Styled Components / Emotion
   - When css-in-js libraries are not set up for pre-rendering (SSR/SSG) it will often lead to a hydration mismatch. In general this means the application has to follow the Next.js example for the library. For example if `pages/_document` is missing and the Babel plugin is not added.
-    - Possible fix for Styled Components: https://github.com/vercel/next.js/tree/canary/examples/with-styled-components
-      - If you want to leverage Styled Components with the new Next.js Compiler in Next.js 12 there is an [experimental flag available](https://github.com/vercel/next.js/discussions/30174#discussion-3643870)
+    - Possible fix for Styled Components:
+      - If you want to leverage Styled Components with SWC in Next.js 12.1+ you need to [add it to your Next.js config under compiler options](https://nextjs.org/docs/advanced-features/compiler#styled-components): https://github.com/vercel/next.js/tree/canary/examples/with-styled-components
+      - If you want to use Styled Components with Babel, you need `pages/_document` and the Babel plugin: https://github.com/vercel/next.js/tree/canary/examples/with-styled-components-babel
     - Possible fix for Emotion: https://github.com/vercel/next.js/tree/canary/examples/with-emotion
 - When using other css-in-js libraries
   - Similar to Styled Components / Emotion css-in-js libraries generally need configuration specified in their examples in the [examples directory](https://github.com/vercel/next.js/tree/canary/examples)

diff --git a/examples/with-styled-components/.babelrc → ...les/with-styled-components-babel/.babelrc b/examples/with-styled-components/.babelrc → ...les/with-styled-components-babel/.babelrc
diff --git a/examples/with-styled-components-babel/.gitignore b/examples/with-styled-components-babel/.gitignore
@@ -0,0 +1,34 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel
diff --git a/examples/with-styled-components-babel/README.md b/examples/with-styled-components-babel/README.md
@@ -0,0 +1,29 @@
+# Example app with styled-components using babel
+
+This example features how you use a different styling solution than [styled-jsx](https://github.com/vercel/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 [styled-components](https://github.com/styled-components/styled-components).
+
+For this purpose we are extending the `<Document />` and injecting the server side rendered styles into the `<head>`, and also adding the `babel-plugin-styled-components` (which is required for server side rendering). Additionally we set up a global [theme](https://www.styled-components.com/docs/advanced#theming) for styled-components using NextJS custom [`<App>`](https://nextjs.org/docs/advanced-features/custom-app) component.
+
+## Preview
+
+Preview the example live on [StackBlitz](http://stackblitz.com/):
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/vercel/next.js/tree/canary/examples/with-styled-components-babel)
+
+## Deploy your own
+
+Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example):
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/with-styled-components-babel&project-name=with-styled-components-babel&repository-name=with-styled-components-babel)
+
+## How to use
+
+Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
+
+```bash
+npx create-next-app --example with-styled-components-babel with-styled-components-babel-app
+# or
+yarn create next-app --example with-styled-components-babel with-styled-components-babel-app
+```
+
+Deploy it to the cloud with [Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).
diff --git a/examples/with-styled-components-babel/package.json b/examples/with-styled-components-babel/package.json
@@ -0,0 +1,18 @@
+{
+  "private": true,
+  "scripts": {
+    "dev": "next",
+    "build": "next build",
+    "start": "next start"
+  },
+  "dependencies": {
+    "next": "latest",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2",
+    "react-is": "^17.0.2",
+    "styled-components": "^5.2.3"
+  },
+  "devDependencies": {
+    "babel-plugin-styled-components": "^1.12.0"
+  }
+}
diff --git a/examples/with-styled-components-babel/pages/_app.js b/examples/with-styled-components-babel/pages/_app.js
@@ -0,0 +1,26 @@
+import { createGlobalStyle, ThemeProvider } from 'styled-components'
+
+const GlobalStyle = createGlobalStyle`
+  body {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+  }
+`
+
+const theme = {
+  colors: {
+    primary: '#0070f3',
+  },
+}
+
+export default function App({ Component, pageProps }) {
+  return (
+    <>
+      <GlobalStyle />
+      <ThemeProvider theme={theme}>
+        <Component {...pageProps} />
+      </ThemeProvider>
+    </>
+  )
+}
diff --git a/...with-styled-components/pages/_document.js → ...tyled-components-babel/pages/_document.js b/...with-styled-components/pages/_document.js → ...tyled-components-babel/pages/_document.js
diff --git a/examples/with-styled-components-babel/pages/index.js b/examples/with-styled-components-babel/pages/index.js
@@ -0,0 +1,10 @@
+import styled from 'styled-components'
+
+const Title = styled.h1`
+  font-size: 50px;
+  color: ${({ theme }) => theme.colors.primary};
+`
+
+export default function Home() {
+  return <Title>My page</Title>
+}
diff --git a/examples/with-styled-components/README.md b/examples/with-styled-components/README.md
@@ -2,7 +2,9 @@
 
 This example features how you use a different styling solution than [styled-jsx](https://github.com/vercel/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 [styled-components](https://github.com/styled-components/styled-components).
 
-For this purpose we are extending the `<Document />` and injecting the server side rendered styles into the `<head>`, and also adding the `babel-plugin-styled-components` (which is required for server side rendering). Additionally we set up a global [theme](https://www.styled-components.com/docs/advanced#theming) for styled-components using NextJS custom [`<App>`](https://nextjs.org/docs/advanced-features/custom-app) component.
+This example uses the Rust-based [SWC](https://nextjs.org/docs/advanced-features/compiler#styled-components) in Next.js for better performance than Babel.
+
+Currently, only the `ssr` and `displayName` transforms have been implemented. These two transforms are the main requirement for using `styled-components` in Next.js.
 
 ## Preview
 

diff --git a/examples/with-styled-components/next.config.js b/examples/with-styled-components/next.config.js
@@ -0,0 +1,10 @@
+/** @type {import('next').NextConfig} */
+
+const nextConfig = {
+  reactStrictMode: true,
+  compiler: {
+    styledComponents: true,
+  },
+}
+
+module.exports = nextConfig
diff --git a/examples/with-styled-components/package.json b/examples/with-styled-components/package.json
@@ -11,8 +11,5 @@
     "react-dom": "^17.0.2",
     "react-is": "^17.0.2",
     "styled-components": "^5.2.3"
-  },
-  "devDependencies": {
-    "babel-plugin-styled-components": "^1.12.0"
   }
 }
diff --git a/examples/with-typescript-styled-components/.babelrc b/examples/with-typescript-styled-components/.babelrc
diff --git a/examples/with-typescript-styled-components/next.config.js b/examples/with-typescript-styled-components/next.config.js
@@ -0,0 +1,10 @@
+/** @type {import('next').NextConfig} */
+
+const nextConfig = {
+  reactStrictMode: true,
+  compiler: {
+    styledComponents: true,
+  },
+}
+
+module.exports = nextConfig
diff --git a/examples/with-typescript-styled-components/package.json b/examples/with-typescript-styled-components/package.json
@@ -17,7 +17,6 @@
     "@types/react": "17.0.4",
     "@types/react-dom": "17.0.3",
     "@types/styled-components": "5.1.9",
-    "babel-plugin-styled-components": "^1.12.0",
-    "typescript": "4.2.4"
+    "typescript": "^4.5.5"
   }
 }
diff --git a/examples/with-typescript-styled-components/pages/_document.tsx b/examples/with-typescript-styled-components/pages/_document.tsx
diff --git a/...n-pnp/test/with-styled-components.test.ts → ...test/with-styled-components-babel.test.ts b/...n-pnp/test/with-styled-components.test.ts → ...test/with-styled-components-babel.test.ts
@@ -1,5 +1,5 @@
 import { runTests } from './utils'
 
 describe('yarn PnP', () => {
-  runTests('with-styled-components')
+  runTests('with-styled-components-babel')
 })