## Summary
Converts SUI's existing Select and Slider to Mantine-backed
implementations, and adds three new Mantine-backed SUI components:
MultiSelect, NumberInput, ColorInput.
All five components follow the same contract as the rest of the SUI
catalogue:
- Imported from `@app/ui` — Mantine is an implementation detail
- Explicit prop allowlists: appearance props (color, variant, radius,
classNames, styles) are locked internally to SUI tokens; only
behavioural props are exposed
- Labels and error messages stripped from the interface — callers use
`<FormField>` for both. The components take an `invalid` flag that
applies error styling only; Mantine never renders its own message
element, so the text can't appear twice
- `aria-label` / `aria-invalid` / `aria-describedby` and `FormField`'s
injected `required` are forwarded, so the injected accessibility wiring
reaches the underlying input. Mantine drops some of this wiring
internally (`aria-describedby` on inputs, all aria props on Slider's
thumb, `required` on MultiSelect's field), so `ariaForwarding.ts`
re-applies it to the DOM node and `ariaForwarding.test.tsx` locks the
contract in
- Typed escape hatches (`comboboxProps`, `popoverProps`, `rightSection`)
documented for the z-index-in-modal use case
**Select** — rebuilt from native `<select>` to Mantine combobox. Gains
searchable/clearable. `onChange` now receives the value string directly,
not a DOM event — callers updated.
**Slider** — rebuilt from native `<input type="range">` to Mantine
Slider. Gains accessible keyboard navigation and `marks` support.
**MultiSelect, NumberInput, ColorInput** — new components. The behaviour
(multi-select combobox, number stepper, colour picker) is too complex to
hand-build correctly; Mantine provides it for free behind a locked SUI
interface.
Also wires `suiCssVariablesResolver` into the Storybook
`MantineProvider` so Mantine combobox/popover dropdowns follow the SUI
palette in dark mode, and adds `"neutral"` accent variant to
`IconBadge`.
## Usage
```tsx
import { Select, Slider, MultiSelect, NumberInput, ColorInput } from "@app/ui";
import { FormField } from "@app/ui/FormField";
// Select — onChange receives string | null, not a DOM event
<FormField label="Retention">
<Select options={options} value={value} onChange={setValue} searchable clearable />
</FormField>
// Slider — same external API as before, now with marks support
<FormField label="Confidence">
<Slider value={v} onChange={setV} min={0} max={1} marks={[{ value: 0.5, label: "0.5" }]} />
</FormField>
// New components
<FormField label="PII types">
<MultiSelect data={options} value={value} onChange={setValue} searchable clearable />
</FormField>
<FormField label="Opacity">
<NumberInput value={opacity} onChange={setOpacity} min={0} max={100} suffix="%" />
</FormField>
<FormField label="Watermark colour">
<ColorInput value={color} onChange={setColor} />
</FormField>
```
## Notes
- **Select `onChange` is a breaking change** — receives `string | null`
instead of a DOM event. All existing callers in this repo are updated.
- The policy PR (`main` WIP) depends on this merging first.
- Stories for all five components are under **Primitives / Forms** in
Storybook.
Stirling PDF - The Open-Source PDF Platform
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For a full feature list, see the docs: https://docs.stirlingpdf.com
Quick Start
docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf
Then open: http://localhost:8080
For full installation options (including desktop and Kubernetes), see our Documentation Guide.
Resources
Support
- Community: Discord
- Bug Reports: GitHub Issues
Contributing
We welcome contributions! Please see CONTRIBUTING.md for guidelines.
This project uses Task as a unified command runner for all build, dev, and test commands. Run task dev to get started running the editor, run task to see the most common commands, or see the Developer Guide for full details.
For adding translations, see the Translation Guide.
License
Stirling PDF is open-core. See LICENSE for details.

