复制一段给 AI 编程工具的提示词，包含源码、依赖和用法
属性
SignaturePadProps
同时支持以下类型的全部属性： Omit<React.ComponentProps<"div">, "onChange">
| 属性 | 类型 | 默认值 | 说明 |
|---|---|---|---|
| inks | SignatureInk[] | — | — |
| defaultWidth | number | — | — |
| exportBackground | string | null | — | Background painted into the exported PNG. Pass null for a transparent PNG. |
| filename | string | — | File name used by the download button |
| onExport | (dataUrl: string) => void | — | Called with the PNG data URL when the download button is pressed |
| onChange | (isEmpty: boolean) => void | — | Called whenever the signature becomes empty or non-empty |
| hint | string | — | — |
安装
$ npx shadcn@latest add https://chromotion.dev/r/signature-pad.json