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mellyeliu merged 1 commit into from
Jan 28, 2026
+54 −13
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Add more compelling custom marker example #1468

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67 changes: 54 additions & 13 deletions packages/docs/content/docs/api/javascript/when.mdx
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Expand Up @@ -170,27 +170,68 @@ const styles = stylex.create({
## Using custom markers

Custom markers created with `stylex.defineMarker()` let you have multiple
independent sets of contextual selectors in the same component tree.
independent sets of contextual selectors in the same component tree. For
example, a table cell could have different styling depending on whether
the cell itself is being hovered, or whether its row is being hovered:

```tsx
import * as stylex from '@stylexjs/stylex';
import { cardMarker, headingMarker } from './markers.stylex.js';
// markers.stylex.js
import * as stylex from "@stylexjs/stylex";
export const rowMarker = stylex.defineMarker();
export const cellMarker = stylex.defineMarker();

```
```tsx
import * as stylex from "@stylexjs/stylex";
import { cellMarker, rowMarker } from "./markers.stylex.js";

const styles = stylex.create({
heading: {
transform: {
default: 'translateX(0)',
[stylex.when.ancestor(':hover', cardMarker)]: 'translateX(10px)',
[stylex.when.ancestor(':hover', headingMarker)]: 'translateX(4px)',
editButton: {
visibility: {
// Show button when row is hovered
default: 'hidden',
[stylex.when.ancestor(':hover', rowMarker)]: 'visible',
},
opacity: {
// Dim the button unless the cell itself is hovered
default: 0.4,
[stylex.when.ancestor(':hover', cellMarker)]: 1,
},
},
});

<div {...stylex.props(cardMarker)}>
<h2 {...stylex.props(headingMarker)}>
<span {...stylex.props(styles.heading)}>Title</span>
</h2>
</div>;
function Row({ children }) {
return <tr {...stylex.props(rowMarker)}>{children}</tr>;
}

function Cell({ children }) {
return (<td {...stylex.props(cellMarker)}>{children}</td>);
}

function EditableContents({children}) {
return (
<>
{children}
<button {...stylex.props(styles.editButton)}>Edit</button>
</>
);
}

export default function App() {
return (
<table>
<Row>
<Cell><EditableContents>Daniel</EditableContents></Cell>
<Cell>1234</Cell>
</Row>
<Row>
<Cell><EditableContents>Test</EditableContents></Cell>
<Cell>Two</Cell>
</Row>
</table>
);
}

```

## Specificity ranking
Expand Down