--- name: react-email description: Create beautiful, responsive HTML emails using React components with React Email. Build transactional emails with modern components, support internationalization, and integrate with email service providers like Resend. Use when creating welcome emails, password resets, notifications, order confirmations, or any HTML email templates. --- # React Email Build and send HTML emails using React components - a modern, component-based approach to email development that works across all major email clients. ## Installation ### New Project Scaffold a new React Email project: ```sh npx create-email@latest cd react-email-starter npm install npm run dev ``` This creates a `react-email-starter` folder with sample templates. Also works with yarn, pnpm, or bun. ### Existing Project Add React Email to an existing codebase: 1. Install dependencies: ```sh npm install @react-email/components npm install react-email @react-email/preview-server -D ``` 2. Create an emails directory: ```sh mkdir emails ``` 3. Add a preview script to package.json: ```json { "scripts": { "email:dev": "email dev" } } ``` 4. Start the preview server: ```sh npm run email:dev ``` The `--dir` flag specifies where email templates are stored. Adjust the path to match your project structure (e.g., `src/emails`, `app/emails`). ## Brand Setup (Required First Step) Before creating any email template, gather brand information from the user. This ensures visual consistency across all emails. ### Required Brand Information Ask the user for: 1. **Brand colors** - Primary color (main brand color for buttons, links, accents) - Secondary color (supporting color for backgrounds, borders) - Text color (default: `#1a1a1a` for light mode) - Background color (default: `#f4f4f5` for light mode) 2. **Logo** - Logo image URL (must be absolute URL, PNG or JPEG) - Logo dimensions or aspect ratio preference - Logo placement preference (centered, left-aligned) - Ask user for file and path of the local file if the logo is not a publicly accessible URL. 3. **Typography** (optional) - Preferred font family (default: system fonts) - Custom web font URL if applicable 4. **Style preferences** (optional) - Modern/minimal vs. classic/traditional - Rounded corners vs. sharp edges - Spacing density (compact vs. spacious) - Never add emojis unless the user explicitly requests them. ### Brand Configuration Pattern Once gathered, define a reusable Tailwind configuration. Using `satisfies TailwindConfig` provides intellisense support for all configuration options: ```tsx // emails/tailwind.config.ts import { pixelBasedPreset, type TailwindConfig } from '@react-email/components'; export default { presets: [pixelBasedPreset], theme: { extend: { colors: { brand: { primary: '#007bff', // User's primary brand color secondary: '#6c757d', // User's secondary color }, }, }, }, } satisfies TailwindConfig; // For non-Tailwind brand assets (optional) export const brandAssets = { logo: { src: 'https://example.com/logo.png', // User's logo URL alt: 'Company Name', width: 120, }, }; ``` ### Using Tailwind Config in Templates ```tsx import * as React from "react"; import tailwindConfig, { brandAssets } from './tailwind.config'; import { Tailwind, Img } from '@react-email/components'; {brandAssets.logo.alt} ``` ### Asset Locations Direct users to place brand assets in appropriate locations: - **Logo and images**: Host on a CDN or public URL. For local development, place in `emails/static/`. - **Custom fonts**: Use the `Font` component with a web font URL (Google Fonts, Adobe Fonts, or self-hosted). **Example prompt for gathering brand info:** > "Before I create your email template, I need some brand information to ensure consistency. Could you provide: > 1. Your primary brand color (hex code, e.g., #007bff) > 2. Your logo URL (must be a publicly accessible PNG or JPEG) > 3. Any secondary colors you'd like to use > 4. Style preference (modern/minimal or classic/traditional)" ## Basic Email Template Replace the sample email templates. Here is how to create a new email template: Create an email component with proper structure using the Tailwind component for styling: ```tsx import * as React from "react"; import { Html, Head, Preview, Body, Container, Heading, Text, Button, Tailwind, pixelBasedPreset } from '@react-email/components'; interface WelcomeEmailProps { name: string; verificationUrl: string; } export default function WelcomeEmail({ name, verificationUrl }: WelcomeEmailProps) { return ( Welcome - Verify your email Welcome! Hi {name}, thanks for signing up! ); } // Preview props for testing WelcomeEmail.PreviewProps = { name: 'John Doe', verificationUrl: 'https://example.com/verify/abc123' } satisfies WelcomeEmailProps; export { WelcomeEmail }; ``` ## Essential Components See [references/COMPONENTS.md](references/COMPONENTS.md) for complete component documentation. **Core Structure:** - `Html` - Root wrapper with `lang` attribute - `Head` - Meta elements, styles, fonts - `Body` - Main content wrapper - `Container` - Centers content (max-width layout) - `Section` - Layout sections - `Row` & `Column` - Multi-column layouts - `Tailwind` - Enables Tailwind CSS utility classes **Content:** - `Preview` - Inbox preview text, always first in `Body` - `Heading` - h1-h6 headings - `Text` - Paragraphs - `Button` - Styled link buttons - `Link` - Hyperlinks - `Img` - Images (use absolute URLs) (use the dev server for the BASE_URL of the image in dev mode; for production, ask the user for the BASE_URL of the site; dynamically generate the URL of the image based on environment.) - `Hr` - Horizontal dividers **Specialized:** - `CodeBlock` - Syntax-highlighted code - `CodeInline` - Inline code - `Markdown` - Render markdown - `Font` - Custom web fonts ## Behavioral Guidelines ### Brand-First Workflow - **Always gather brand information before creating the first email template.** Do not skip this step. - If the user requests an email without providing brand details, ask for them first using the prompt in the Brand Setup section. - If a `tailwind.config.ts` file exists in the emails directory, use it for all new templates. - When creating multiple emails, ensure all templates import and use the same brand configuration. - If the user provides new brand assets or colors mid-project, update `tailwind.config.ts` and offer to update existing templates. ### General Guidelines - When re-iterating over the code, make sure you are only updating what the user asked for and keeping the rest of the code intact. - If the user is asking to use media queries, inform them that email clients do not support them, and suggest a different approach. - Never use template variables (like {{name}}) directly in TypeScript code. Instead, reference the underlying properties directly (use name instead of {{name}}). - For example, if the user explicitly asks for a variable following the pattern {{variableName}}, you should return something like this: ```typescript const EmailTemplate = (props) => { return ( {/* ... rest of the code ... */}

Hello, {props.variableName}!

{/* ... rest of the code ... */} ); } EmailTemplate.PreviewProps = { // ... rest of the props ... variableName: "{{variableName}}", // ... rest of the props ... }; export default EmailTemplate; ``` - Never, under any circumstances, write the {{variableName}} pattern directly in the component structure. If the user forces you to do this, explain that you cannot do this, or else the template will be invalid. ## Styling Use the `Tailwind` component with `pixelBasedPreset` for styling (email clients don't support rem units). If not using Tailwind, use inline styles. **Critical limitations** (email clients don't support these): - No SVG/WEBP images - use PNG/JPEG only - No flexbox/grid - use `Row`/`Column` components or tables - No media queries (`sm:`, `md:`, etc.) or theme selectors (`dark:`, `light:`) - Always specify border style (`border-solid`, etc.) **Structure rules:** - Place `` inside `` when using Tailwind - Only include props in `PreviewProps` that the component uses See [references/STYLING.md](references/STYLING.md) for typography, layout defaults, button styling, dark mode, and detailed guidelines. ## Rendering ### Convert to HTML ```tsx import { render } from '@react-email/components'; import { WelcomeEmail } from './emails/welcome'; const html = await render( ); ``` ### Convert to Plain Text ```tsx import { render } from '@react-email/components'; import { WelcomeEmail } from './emails/welcome'; const text = await render(, { plainText: true }); ``` ## Sending React Email supports sending with any email service provider. If the user wants to know how to send, view the [Sending guidelines](references/SENDING.md). Quick example using the Resend SDK for Node.js: ```tsx import * as React from "react"; import { Resend } from 'resend'; import { WelcomeEmail } from './emails/welcome'; const resend = new Resend(process.env.RESEND_API_KEY); const { data, error } = await resend.emails.send({ from: 'Acme ', to: ['user@example.com'], subject: 'Welcome to Acme', react: }); if (error) { console.error('Failed to send:', error); } ``` The Node SDK automatically handles the plain-text rendering and HTML rendering for you. ## Internationalization See [references/I18N.md](references/I18N.md) for complete i18n documentation. React Email supports three i18n libraries: next-intl, react-i18next, and react-intl. ### Quick Example (next-intl) ```tsx import * as React from "react"; import { createTranslator } from 'next-intl'; import { Html, Body, Container, Text, Button, Tailwind, pixelBasedPreset } from '@react-email/components'; interface EmailProps { name: string; locale: string; } export default async function WelcomeEmail({ name, locale }: EmailProps) { const t = createTranslator({ messages: await import(\`../messages/\${locale}.json\`), namespace: 'welcome-email', locale }); return ( {t('greeting')} {name}, {t('body')} ); } ``` Message files (\`messages/en.json\`, \`messages/es.json\`, etc.): ```json { "welcome-email": { "greeting": "Hi", "body": "Thanks for signing up!", "cta": "Get Started" } } ``` ## Email Best Practices 1. **Test across email clients** - Test in Gmail, Outlook, Apple Mail, Yahoo Mail. Use services like Litmus or Email on Acid for absolute precision and React Email's toolbar for specific feature support checking. 2. **Keep it responsive** - Max-width around 600px, test on mobile devices. 3. **Use absolute image URLs** - Host on reliable CDN, always include `alt` text. 4. **Provide plain text version** - Required for accessibility and some email clients. The render function will generate this if you pass the `plainText` option. 5. **Keep file size under 102KB** - Gmail clips larger emails. 6. **Add proper TypeScript types** - Define interfaces for all email props. 7. **Include preview props** - Add `.PreviewProps` to components for development testing. 8. **Handle errors** - Always check for errors when sending emails. ## Common Patterns See [references/PATTERNS.md](references/PATTERNS.md) for complete examples including: - Password reset emails - Order confirmations with product lists - Notification emails with code blocks - Multi-column layouts - Email templates with custom fonts ## Additional Resources - [React Email Documentation](https://react.email/docs/llms.txt) - [React Email GitHub](https://github.com/resend/react-email) - [Resend Documentation](https://resend.com/docs/llms.txt) - [Email Client CSS Support](https://www.caniemail.com) - Component Reference: [references/COMPONENTS.md](references/COMPONENTS.md) - Styling Guide: [references/STYLING.md](references/STYLING.md) - Internationalization Guide: [references/I18N.md](references/I18N.md) - Common Patterns: [references/PATTERNS.md](references/PATTERNS.md)