Example of twin inside an nx-workplace

nx-workspace-emotion/.editorconfig

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+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

nx-workspace-emotion/.eslintrc.json

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+{
+  "root": true,
+  "ignorePatterns": ["**/*"],
+  "plugins": ["@nrwl/nx"],
+  "overrides": [
+    {
+      "files": ["*.ts", "*.tsx", "*.js", "*.jsx"],
+      "rules": {
+        "@nrwl/nx/enforce-module-boundaries": [
+          "error",
+          {
+            "enforceBuildableLibDependency": true,
+            "allow": [],
+            "depConstraints": [
+              { "sourceTag": "*", "onlyDependOnLibsWithTags": ["*"] }
+            ]
+          }
+        ]
+      }
+    },
+    {
+      "files": ["*.ts", "*.tsx"],
+      "extends": ["plugin:@nrwl/nx/typescript"],
+      "parserOptions": { "project": "./tsconfig.*?.json" },
+      "rules": {}
+    },
+    {
+      "files": ["*.js", "*.jsx"],
+      "extends": ["plugin:@nrwl/nx/javascript"],
+      "rules": {}
+    }
+  ]
+}

nx-workspace-emotion/.gitignore

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+# See http://help.github.com/ignore-files/ for more about ignoring files.
+
+# compiled output
+/dist
+/tmp
+/out-tsc
+
+# dependencies
+/node_modules
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# misc
+/.sass-cache
+/connect.lock
+/coverage
+/libpeerconnection.log
+npm-debug.log
+yarn-error.log
+testem.log
+/typings
+
+# System Files
+.DS_Store
+Thumbs.db

nx-workspace-emotion/.prettierignore

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+# Add files here to ignore them from prettier formatting
+
+/dist
+/coverage

nx-workspace-emotion/.prettierrc

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+{
+  "singleQuote": true
+}

nx-workspace-emotion/README.md

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+# NxWorkspaceEmotion
+
+This project was generated using [Nx](https://nx.dev).
+
+<p align="center"><img src="https://raw.githubusercontent.com/nrwl/nx/master/images/nx-logo.png" width="450"></p>
+
+🔎 **Nx is a set of Extensible Dev Tools for Monorepos.**
+
+## Adding capabilities to your workspace
+
+Nx supports many plugins which add capabilities for developing different types of applications and different tools.
+
+These capabilities include generating applications, libraries, etc as well as the devtools to test, and build projects as well.
+
+Below are our core plugins:
+
+- [React](https://reactjs.org)
+  - `npm install --save-dev @nrwl/react`
+- Web (no framework frontends)
+  - `npm install --save-dev @nrwl/web`
+- [Angular](https://angular.io)
+  - `npm install --save-dev @nrwl/angular`
+- [Nest](https://nestjs.com)
+  - `npm install --save-dev @nrwl/nest`
+- [Express](https://expressjs.com)
+  - `npm install --save-dev @nrwl/express`
+- [Node](https://nodejs.org)
+  - `npm install --save-dev @nrwl/node`
+
+There are also many [community plugins](https://nx.dev/nx-community) you could add.
+
+## Generate an application
+
+Run `nx g @nrwl/react:app my-app` to generate an application.
+
+> You can use any of the plugins above to generate applications as well.
+
+When using Nx, you can create multiple applications and libraries in the same workspace.
+
+## Generate a library
+
+Run `nx g @nrwl/react:lib my-lib` to generate a library.
+
+> You can also use any of the plugins above to generate libraries as well.
+
+Libraries are shareable across libraries and applications. They can be imported from `@nx-workspace-emotion/mylib`.
+
+## Development server
+
+Run `nx serve my-app` for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
+
+## Code scaffolding
+
+Run `nx g @nrwl/react:component my-component --project=my-app` to generate a new component.
+
+## Build
+
+Run `nx build my-app` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
+
+## Running unit tests
+
+Run `nx test my-app` to execute the unit tests via [Jest](https://jestjs.io).
+
+Run `nx affected:test` to execute the unit tests affected by a change.
+
+## Running end-to-end tests
+
+Run `ng e2e my-app` to execute the end-to-end tests via [Cypress](https://www.cypress.io).
+
+Run `nx affected:e2e` to execute the end-to-end tests affected by a change.
+
+## Understand your workspace
+
+Run `nx dep-graph` to see a diagram of the dependencies of your projects.
+
+## Further help
+
+Visit the [Nx Documentation](https://nx.dev) to learn more.
+
+## ☁ Nx Cloud
+
+### Computation Memoization in the Cloud
+
+<p align="center"><img src="https://raw.githubusercontent.com/nrwl/nx/master/images/nx-cloud-card.png"></p>
+
+Nx Cloud pairs with Nx in order to enable you to build and test code more rapidly, by up to 10 times. Even teams that are new to Nx can connect to Nx Cloud and start saving time instantly.
+
+Teams using Nx gain the advantage of building full-stack applications with their preferred framework alongside Nx’s advanced code generation and project dependency graph, plus a unified experience for both frontend and backend developers.
+
+Visit [Nx Cloud](https://nx.app/) to learn more.

nx-workspace-emotion/apps/web/.eslintrc.json

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+{
+  "extends": ["plugin:@nrwl/nx/react", "../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"]
+}

nx-workspace-emotion/apps/web/babel-jest.config.json

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+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "targets": {
+          "node": "current"
+        }
+      }
+    ],
+    "@babel/preset-typescript",
+    "@babel/preset-react"
+  ]
+}

nx-workspace-emotion/apps/web/babel.config.js

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+module.exports = {
+  presets: [
+    [
+      'next/babel',
+      {
+        'preset-react': {
+          runtime: 'automatic',
+          importSource: '@emotion/react',
+        },
+      },
+    ],
+  ],
+  plugins: ['@emotion/babel-plugin', 'babel-plugin-macros'],
+};

nx-workspace-emotion/apps/web/index.d.ts

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+/* eslint-disable @typescript-eslint/no-explicit-any */
+declare module '*.svg' {
+  const content: any;
+  export const ReactComponent: any;
+  export default content;
+}

nx-workspace-emotion/apps/web/jest.config.js

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+module.exports = {
+  displayName: 'web',
+  preset: '../../jest.preset.js',
+  transform: {
+    '^(?!.*\\.(js|jsx|ts|tsx|css|json)$)': '@nrwl/react/plugins/jest',
+    '^.+\\.[tj]sx?$': [
+      'babel-jest',
+      { cwd: __dirname, configFile: './babel-jest.config.json' },
+    ],
+  },
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
+  coverageDirectory: '../../coverage/apps/web',
+};

nx-workspace-emotion/apps/web/next-env.d.ts

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+/// <reference types="next" />
+/// <reference types="next/types/global" />

nx-workspace-emotion/apps/web/next.config.js

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+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const withNx = require('@nrwl/next/plugins/with-nx');
+
+module.exports = withNx({
+  webpack: (config, { isServer }) => {
+    // Fixes packages that depend on fs/module module
+    if (!isServer) {
+      config.node = { fs: 'empty', module: 'empty' };
+    }
+
+    return config;
+  },
+});

nx-workspace-emotion/apps/web/pages/_app.tsx

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+import React from 'react';
+import { AppProps } from 'next/app';
+import Head from 'next/head';
+import { GlobalStyles } from 'twin.macro';
+
+function CustomApp({ Component, pageProps }: AppProps) {
+  return (
+    <>
+      <Head>
+        <title>Welcome to web!</title>
+      </Head>
+      <GlobalStyles />
+      <main>
+        <Component {...pageProps} />
+      </main>
+    </>
+  );
+}
+
+export default CustomApp;

nx-workspace-emotion/apps/web/pages/_document.tsx

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+import Document, { Html, Head, Main, NextScript } from 'next/document';
+import { extractCritical } from '@emotion/server';
+
+export default class MyDocument extends Document {
+  static async getInitialProps(ctx) {
+    const initialProps = await Document.getInitialProps(ctx);
+    const page = await ctx.renderPage();
+    const styles = extractCritical(page.html);
+    return { ...initialProps, ...page, ...styles };
+  }
+
+  render() {
+    return (
+      <Html lang="en">
+        <Head>
+          <style
+            data-emotion-css={this.props.ids.join(' ')}
+            dangerouslySetInnerHTML={{ __html: this.props.css }}
+          />
+        </Head>
+        <body>
+          <Main />
+          <NextScript />
+        </body>
+      </Html>
+    );
+  }
+}

nx-workspace-emotion/apps/web/pages/index.tsx

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+import React from 'react';
+import { Button } from '@my-twin-project/shared-ui';
+
+export function Index() {
+  /*
+   * Replace the elements below with your own.
+   *
+   * Note: The corresponding styles are in the ./index.@emotion/styled file.
+   */
+  return (
+    <>
+      <h2>Shared Resources</h2>
+      <Button isPrimary>Primary</Button>
+      <Button isSecondary>Secondary</Button>
+    </>
+  );
+}
+
+export default Index;

nx-workspace-emotion/apps/web/specs/index.spec.tsx

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+import React from 'react';
+import { render } from '@testing-library/react';
+
+import Index from '../pages/index';
+
+describe('Index', () => {
+  it('should render successfully', () => {
+    const { baseElement } = render(<Index />);
+    expect(baseElement).toBeTruthy();
+  });
+});

nx-workspace-emotion/apps/web/tsconfig.app.json

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+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": ["node", "jest"]
+  },
+  "exclude": ["**/*.spec.ts", "**/*.spec.tsx"],
+  "include": ["**/*.ts", "**/*.tsx", "next-env.d.ts"]
+}