chore(preconstruct): inline css via babel config, add themes package

babel.config.js

@@ -4,4 +4,5 @@ module.exports = {
     '@babel/preset-typescript',
     '@babel/preset-env',
   ],
+  plugins: ['./tooling/inject-css-babel-plugin'],
 };

examples/nextjs/.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "next/core-web-vitals"
+}

examples/nextjs/.gitignore

@@ -0,0 +1,32 @@
+# 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*
+.pnpm-debug.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel

examples/nextjs/README.md

@@ -0,0 +1,34 @@
+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `pages/index.js`. The page auto-updates as you edit the file.
+
+[API routes](https://nextjs.org/docs/api-routes/introduction) can be accessed on [http://localhost:3000/api/hello](http://localhost:3000/api/hello). This endpoint can be edited in `pages/api/hello.js`.
+
+The `pages/api` directory is mapped to `/api/*`. Files in this directory are treated as [API routes](https://nextjs.org/docs/api-routes/introduction) instead of React pages.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

examples/nextjs/next.config.js

@@ -0,0 +1,9 @@
+const withPreconstruct = require('@preconstruct/next');
+
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  reactStrictMode: true,
+  swcMinify: true,
+};
+
+module.exports = withPreconstruct({ ...nextConfig });

examples/nextjs/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "nextjs",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@preconstruct/next": "^4.0.0",
+    "@react-flow/core": "11.0.0",
+    "@react-flow/themes": "11.0.0",
+    "next": "12.2.2",
+    "react": "18.2.0",
+    "react-dom": "18.2.0"
+  },
+  "devDependencies": {
+    "eslint": "8.19.0",
+    "eslint-config-next": "12.2.2"
+  }
+}

examples/nextjs/pages/_app.js

@@ -0,0 +1,7 @@
+import '../styles/globals.css'
+
+function MyApp({ Component, pageProps }) {
+  return <Component {...pageProps} />
+}
+
+export default MyApp

examples/nextjs/pages/index.js

@@ -0,0 +1,10 @@
+import ReactFlow from '@react-flow/core';
+import '@react-flow/themes/dark';
+
+export default function Home() {
+  return (
+    <div style={{ height: '100vh' }}>
+      <ReactFlow defaultNodes={[]} defaultEdges={[]} />
+    </div>
+  );
+}

examples/nextjs/public/vercel.svg

@@ -0,0 +1,4 @@
+<svg width="283" height="64" viewBox="0 0 283 64" fill="none" 
+    xmlns="http://www.w3.org/2000/svg">
+    <path d="M141.04 16c-11.04 0-19 7.2-19 18s8.96 18 20 18c6.67 0 12.55-2.64 16.19-7.09l-7.65-4.42c-2.02 2.21-5.09 3.5-8.54 3.5-4.79 0-8.86-2.5-10.37-6.5h28.02c.22-1.12.35-2.28.35-3.5 0-10.79-7.96-17.99-19-17.99zm-9.46 14.5c1.25-3.99 4.67-6.5 9.45-6.5 4.79 0 8.21 2.51 9.45 6.5h-18.9zM248.72 16c-11.04 0-19 7.2-19 18s8.96 18 20 18c6.67 0 12.55-2.64 16.19-7.09l-7.65-4.42c-2.02 2.21-5.09 3.5-8.54 3.5-4.79 0-8.86-2.5-10.37-6.5h28.02c.22-1.12.35-2.28.35-3.5 0-10.79-7.96-17.99-19-17.99zm-9.45 14.5c1.25-3.99 4.67-6.5 9.45-6.5 4.79 0 8.21 2.51 9.45 6.5h-18.9zM200.24 34c0 6 3.92 10 10 10 4.12 0 7.21-1.87 8.8-4.92l7.68 4.43c-3.18 5.3-9.14 8.49-16.48 8.49-11.05 0-19-7.2-19-18s7.96-18 19-18c7.34 0 13.29 3.19 16.48 8.49l-7.68 4.43c-1.59-3.05-4.68-4.92-8.8-4.92-6.07 0-10 4-10 10zm82.48-29v46h-9V5h9zM36.95 0L73.9 64H0L36.95 0zm92.38 5l-27.71 48L73.91 5H84.3l17.32 30 17.32-30h10.39zm58.91 12v9.69c-1-.29-2.06-.49-3.2-.49-5.81 0-10 4-10 10V51h-9V17h9v9.2c0-5.08 5.91-9.2 13.2-9.2z" fill="#000"/>
+</svg>

examples/nextjs/styles/Home.module.css

@@ -0,0 +1,3 @@
+.container {
+  position: relative;
+}

examples/nextjs/styles/globals.css

@@ -0,0 +1,16 @@
+html,
+body {
+  padding: 0;
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
+    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
+}
+
+a {
+  color: inherit;
+  text-decoration: none;
+}
+
+* {
+  box-sizing: border-box;
+}

package.json

@@ -15,13 +15,18 @@
     "build": "preconstruct build"
   },
   "dependencies": {
+    "react": "^18.1.0",
+    "react-dom": "^18.1.0"
+  },
+  "devDependencies": {
     "@babel/core": "^7.18.2",
     "@babel/preset-env": "^7.18.2",
     "@babel/preset-react": "^7.17.12",
     "@babel/preset-typescript": "^7.17.12",
     "@preconstruct/cli": "^2.1.8",
-    "react": "^18.1.0",
-    "react-dom": "^18.1.0",
+    "autoprefixer": "^10.4.7",
+    "postcss": "^8.4.14",
+    "postcss-nested": "^5.0.6",
     "typescript": "^4.7.4"
   },
   "preconstruct": {

packages/core/nocss/package.json

@@ -1,6 +0,0 @@
-{
-  "internal": true,
-  "main": "../dist/nocss/umd/index.js",
-  "module": "../dist/nocss/esm/index.js",
-  "types": "../dist/nocss/esm/index.d.ts"
-}

packages/core/package.json

@@ -21,8 +21,8 @@
     "zustand": "^3.7.2"
   },
   "peerDependencies": {
-    "react": "16 || 17 || 18",
-    "react-dom": "16 || 17 || 18"
+    "react": ">=18",
+    "react-dom": ">=18"
   },
   "files": [
     "dist",

packages/core/src/container/ReactFlow/index.tsx

@@ -7,8 +7,10 @@ import InputNode from '../../components/Nodes/InputNode';
 import OutputNode from '../../components/Nodes/OutputNode';
 import SelectionListener from '../../components/SelectionListener';
 import StoreUpdater from '../../components/StoreUpdater';
-// import css from '../../style.css';
-// import theme from '../../theme-default.css';
+
+import '../../style.css';
+import '../../theme-default.css';
+
 import {
   ConnectionLineType,
   ConnectionMode,
@@ -26,11 +28,6 @@ import { createNodeTypes } from '../NodeRenderer/utils';
 import { useNodeOrEdgeTypes } from './utils';
 import Wrapper from './Wrapper';
 
-// if (__INJECT_STYLES__) {
-//   injectStyle(css as unknown as string);
-//   injectStyle(theme as unknown as string);
-// }
-
 const defaultNodeTypes: NodeTypes = {
   input: InputNode,
   default: DefaultNode,

packages/themes/dark/package.json

@@ -0,0 +1,4 @@
+{
+  "main": "dist/react-flow-themes-dark.cjs.js",
+  "module": "dist/react-flow-themes-dark.esm.js"
+}

packages/themes/light/package.json

@@ -0,0 +1,4 @@
+{
+  "main": "dist/react-flow-themes-light.cjs.js",
+  "module": "dist/react-flow-themes-light.esm.js"
+}

packages/themes/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "@react-flow/themes",
+  "version": "11.0.0",
+  "description": "Themes for React Flow",
+  "license": "MIT",
+  "scripts": {
+    "build": "yarn build:darktheme && yarn build:lighttheme",
+    "build:darktheme": "mkdir -p ./dark/dist && cp ./src/react-flow-dark.css ./dark/dist/react-flow-dark.css",
+    "build:lighttheme": "mkdir -p ./light/dist && cp ./src/react-flow-light.css ./dark/dist/react-flow-light.css"
+  },
+  "preconstruct": {
+    "entrypoints": [
+      "dark.js",
+      "light.js"
+    ]
+  }
+}

packages/themes/src/dark.js

@@ -0,0 +1 @@
+import './react-flow-dark.css';

packages/themes/src/light.js

@@ -0,0 +1 @@
+import './react-flow-light.css';

packages/themes/src/react-flow-dark.css

@@ -0,0 +1,3 @@
+.react-flow {
+  background-color: black;
+}

packages/themes/src/react-flow-light.css

@@ -0,0 +1,3 @@
+.react-flow {
+  background-color: red;
+}

tooling/inject-css-babel-plugin.js

@@ -0,0 +1,45 @@
+const fs = require('fs');
+const path = require('path');
+const postcss = require('postcss');
+const autoprefixer = require('autoprefixer');
+const nested = require('postcss-nested');
+
+function getStyleInject(cssString) {
+  return `
+  (function(css) {
+    if (!css || typeof document === 'undefined') return;
+
+    const head = document.head || document.getElementsByTagName('head')[0];
+    const style = document.createElement('style');
+  
+    head.appendChild(style);
+  
+    style.appendChild(document.createTextNode(css));
+  })("${cssString}")
+  `;
+}
+
+module.exports = function (babel) {
+  return {
+    name: 'inject-css-babel-plugin',
+    visitor: {
+      ImportDeclaration(item, state) {
+        if (!item.node.source.value.includes('.css')) {
+          return;
+        }
+
+        const importFilePath = path.resolve(
+          state.file.opts.filename,
+          '..',
+          item.node.source.value
+        );
+
+        const css = fs.readFileSync(importFilePath).toString();
+        const result = postcss([autoprefixer, nested]).process(css);
+        const minified = result.css.replace(/\n/g, '');
+
+        item.replaceWithSourceString(getStyleInject(minified));
+      },
+    },
+  };
+};