Theming

mdx-deck uses styled-components for styling, making practically any part of the presentation themeable.

Built-in Themes

mdx-deck includes several built-in themes to change the look and feel of the presentation. Export theme from your MDX file to enable a theme.

export { dark as theme } from 'mdx-deck/themes'

# Dark Theme

View the List of Themes.

Custom Themes

A custom theme can be provided by exporting theme from the MDX file.

export { default as theme } from './theme'

# Hello

The theme should be an object with fields for fonts, colors, and CSS for individual components. It's recommended that all custom themes extend the default theme as a base.

// Example theme.js
import { theme } from 'mdx-deck/themes'

export default {
  // extends the default theme
  ...theme,
  // add a custom font
  font: 'Roboto, sans-serif',
  // custom colors
  colors: {
    text: '#f0f',
    background: 'black',
    link: '#0ff',
  }
}

Google Fonts

To use webfonts, mdx-deck will attempt to add <link> tags for any font from Google Fonts. To load webfonts from other sources, use a custom Provider component to add custom <link> tags.

Syntax Highlighting

By default fenced code blocks do not include any syntax highlighting. Syntax highlighting in fenced code blocks can be enabled by providing a prism style object in a theme. The syntax highlighting is built with react-syntax-highlighter and PrismJS. Create a theme.js file and export it via the MDX file.

export { default as theme } from './theme'
//...

// example theme.js
import { future } from 'mdx-deck/themes'
import okaidia from 'react-syntax-highlighter/styles/prism/okaidia'

export default {
  ...future,
  prism: {
    style: okaidia
  }
}

By default, only JavaScript and JSX are enabled for syntax highlighting to keep bundle sizes to a minimum. To enable other languages, add a languages object to the prism object in the theme.

// example theme.js
import { future } from 'mdx-deck/themes'
import okaidia from 'react-syntax-highlighter/styles/prism/okaidia'
import prismRuby from 'react-syntax-highlighter/languages/prism/ruby'

export default {
  ...future,
  prism: {
    style: okaidia,
    languages: {
      ruby: prismRuby
    }
  }
}

For lists of available syntax styles and languages, see:

Styling Elements

Each element can be styled with a theme. Add a style object (or string) to the theme to target specific elements.

// example theme
import { theme } from 'mdx-deck/themes'

export default {
  ...theme,
  h1: {
    textTransform: 'uppercase',
    letterSpacing: '0.1em'
  },
  blockquote: {
    fontStyle: 'italic'
  }
}

See the reference below for a full list of element keys.

Reference

The following keys are available for theming:

font: base font family
weights: array of font weights for the main font
monospace: font family for <pre> and <code>
fontSizes: array of font sizes from smallest to largest
colors: object of colors used for MDX components
- text: root foreground color
- background: root background color
- link
- heading
- blockquote
- pre
- preBackground
- code
- codeBackground
css: root CSS object
heading: CSS for all headings
h1: CSS for <h1>
h2: CSS for <h2>
h3: CSS for <h3>
h4: CSS for <h4>
h5: CSS for <h5>
h6: CSS for <h6>
paragraph: CSS for <p>
link: CSS for <a>
ul: CSS for <ul>
ol: CSS for <ol>
li: CSS for <li>
img: CSS for <img>
blockquote: CSS for <blockquote>
table: CSS for <table>
components: object of MDX components to render markdown
Provider: component for wrapping the entire app

Advanced Usage

For more advanced customizations see the Advanced Usage docs.

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