In React, anything that is between the tag is passed as children prop.
// between-component-tag-Highlight.jsx
export const Highlight = ({ children, color }) => (
<span
style={{
backgroundColor: color,
color: 'black',
}}>
{children}
</span>
)
{/* Main.mdx */}
import { Highlight } from './between-component-tag-Highlight.jsx';
<Highlight color="lime">Lime</Highlight>
<Highlight color="cyan">Cyan</Highlight>