@json-render/react-email

React Email renderer. Turn JSON specs into HTML or plain-text emails using @react-email/components and @react-email/render.

Install

npm install @json-render/core @json-render/react-email @react-email/components @react-email/render

See the React Email example for a full working example.

schema

The email element schema for specs. Use with defineCatalog from core.

import { defineCatalog } from '@json-render/core';
import { schema, standardComponentDefinitions } from '@json-render/react-email';

const catalog = defineCatalog(schema, {
  components: standardComponentDefinitions,
});

Render Functions

Server-side functions for producing email output. All accept a spec and optional RenderOptions.

import { renderToHtml, renderToPlainText } from '@json-render/react-email';

const html = await renderToHtml(spec);

const plainText = await renderToPlainText(spec);

RenderOptions

interface RenderOptions {
  registry?: ComponentRegistry;
  includeStandard?: boolean;  // default: true
  state?: Record<string, unknown>;
}

Option	Description
`registry`	Custom component map (merged with standard components)
`includeStandard`	Include built-in standard components (default: `true`)
`state`	Initial state for `$state` / `$cond` dynamic prop resolution

defineRegistry

Create a type-safe component registry from a catalog. Components receive { props, children, emit, bindings, loading }.

import { defineRegistry } from '@json-render/react-email';
import { Container, Heading, Text } from '@react-email/components';

const { registry } = defineRegistry(catalog, {
  components: {
    Card: ({ props, children }) => (
      <Container style={{ padding: 16, backgroundColor: '#fff' }}>
        <Heading>{props.title}</Heading>
        {children}
      </Container>
    ),
  },
});

const html = await renderToHtml(spec, { registry });

createRenderer

Create a standalone renderer component wired to state, actions, and validation (for interactive previews in the browser).

import { createRenderer } from '@json-render/react-email';

const EmailRenderer = createRenderer(catalog, components);

Renderer

The main component that renders a spec to React Email elements. Use inside JSONUIProvider when you need state, actions, or visibility.

interface RendererProps {
  spec: Spec | null;
  registry?: ComponentRegistry;
  includeStandard?: boolean;  // default: true
  loading?: boolean;
  fallback?: ComponentRenderer;
}

Standard Components

Document structure

Component	Description
`Html`	Top-level email wrapper. Must be the root element.
`Head`	Email head section. Place inside Html.
`Body`	Email body wrapper. Place inside Html.

Layout

Component	Description
`Container`	Constrains content width (e.g. max-width 600px).
`Section`	Groups related content.
`Row`	Horizontal layout row.
`Column`	Column within a Row.

Content

Component	Description
`Heading`	Heading text (h1-h6).
`Text`	Body text paragraph.
`Link`	Hyperlink with text and href.
`Button`	Call-to-action button (link styled as button).
`Image`	Image from URL.
`Hr`	Horizontal rule separator.

Utility

Component	Description
`Preview`	Preview text for inbox (inside Html).
`Markdown`	Renders markdown content as email-safe HTML.

Server-Safe Import

Import schema and catalog definitions without pulling in React or @react-email/components:

import { schema, standardComponentDefinitions } from '@json-render/react-email/server';

Sub-path Exports

Export	Description
`@json-render/react-email`	Full package: schema, renderer, components, render functions
`@json-render/react-email/server`	Schema and catalog definitions only (no React)
`@json-render/react-email/catalog`	Standard component definitions and types
`@json-render/react-email/render`	Server-side render functions only

Types

Export	Description
`ReactEmailSchema`	Schema type for email specs
`ReactEmailSpec`	Spec type for email documents
`RenderOptions`	Options for render functions
`ComponentContext`	Typed component render function context
`ComponentFn`	Component render function type
`StandardComponentDefinitions`	Type of the standard component definitions object
`StandardComponentProps<K>`	Inferred props type for a standard component by name