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Theme UI

Themed component

Use the Themed components dict to render UI with styles from theme.styles outside of MDX. For example, if you'd like to reuse heading styles in a React component, you can use the Themed.h1 component to render an <h1> element with styles from theme.styles.h1.

// example
import { Themed } from 'theme-ui'
export default (props) => (
<Themed.h1>Hello, styled heading!</Themed.h1>

For a full list of keys available, see the Theme Specification docs.

Changing the HTML element or component

The rendered HTML element can be changed for each Themed component. This can be useful for ensuring accessible, SEO-friendly, and semantically-correct HTML is rendered while leveraging styles from the theme. This API originated in Rebass and is similar to the @emotion/styled API.

The following example renders a <div> that is styled like an <h2> element.

// example
<Themed.h2 as="div">Hello!</Themed.h2>

This can also be used to style components like the Gatsby Link component to match other links.

<Themed.a as={Link} to="/about">

Body Styles

To add base typographic styles to the <body> element, add styles to theme.styles.root. Previous versions of Theme UI used the Themed.root component. See the theming docs for more information.

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