# RollingNumber

- Page: https://jiguang132.com/resources/mantine/docs/rolling-number
- Resource: Mantine Core (https://jiguang132.com/resources/mantine.md)
- All guides: https://jiguang132.com/resources/mantine/docs.md

Install: `npm install @mantine/core@9.7.1 @mantine/hooks@9.7.1`

## Version and compatibility

Pinned Mantine Core 9.7.1 requires React and React DOM `^19.2.0` and matching `@mantine/hooks@9.7.1`, from the installed npm package's peerDependencies. Do not force it into React 18 or another incompatible version. Explain upgrade impact and agree on a plan with the project owner; do not hide conflicts with --force/--legacy-peer-deps. The native Provider enables `theme.respectReducedMotion` and uses `forceColorScheme` for light/dark.

## Use case

Animate changes to a displayed number.

## Native props used by this example

These props are extracted from the local typechecked JSX and grouped by their owning native component. This is not an exhaustive prop list; see pinned source signatures and inheritance below.

| Component prop | Explanation |
| --- | --- |
| `RollingNumber.value` | Controlled value; the native type defines its shape. |
| `Button.onClick` | Local click handler; replace demo logic with an explicit business action. |

## Interaction and state checks

Current scenarios: Default. Check actual behavior after selecting supported disabled/error/read-only scenarios; components without those native states do not receive invented universal props. Verify keyboard focus and exits, then connect changed values through the native callback signature.

## Business integration boundary

Demo content/state is local, without server persistence, authorization or fetching. A static display component is not a completed business workflow.

## Host setup

Install pinned @mantine/core and @mantine/hooks, import @mantine/core/styles.css at the entry and use MantineProvider. The example's theme/variant are JGuang-authored host props, not universal native component APIs; forceColorScheme synchronizes the app theme. Native implementation source is a reading reference: use npm exports rather than copying internal engines. This batch covers Core, not dates/charts/forms extension packages. Detailed upstream prose remains English.


## Runnable usage

```tsx
import { useState } from 'react';
import * as M from '@mantine/core';
import '@mantine/core/styles.css';


function ComponentPreview({ variant = 'Default' }: { variant?: string }) {
const [value, setValue] = useState(35);
return <><M.RollingNumber value={value} /><M.Button onClick={() => setValue(value + 1)}>Increment</M.Button></>;
}
export default function Example({ variant = 'Default', theme = 'light' }: { variant?: string; theme?: 'light' | 'dark' }) {
return <M.MantineProvider forceColorScheme={theme} theme={{ respectReducedMotion: true }}><ComponentPreview variant={variant} /></M.MantineProvider>;
}

```


## Preview states

Default

The example uses the native Mantine API. For supported input demos, change the local variant to Disabled, Invalid or Read only; these are example labels, not new component props. Keep the documented data, controlled values, stores and compound children when adapting the example.



## Usage

`RollingNumber` animates value changes with rolling digit transitions. Each digit
independently rolls to its new position when the value changes.



## Prefix and suffix

Set `prefix` and `suffix` props to add static text before or after the animated number.
Use `thousandSeparator` to separate thousands and `decimalScale` with `fixedDecimalScale`
to control decimal formatting:



## Animation duration

Control animation speed with `animationDuration` prop (in milliseconds, default is `600`).
Use `timingFunction` prop to change the CSS timing function (default is `ease`):



## Text selection and copying

Selecting and copying `RollingNumber` always produces the value as it is displayed,
for example `$ 1,234.56 USD`. Animated digits are not selectable, text selection
is handled by a transparent copy of the formatted value rendered on top of them.


## Source-backed parameter reference

Implementation signatures and types are generated from the pinned local source. Optional props, native inherited types, union branches and never exclusions are preserved. A forwardRef implementation's ref is a React reference, not an additional business prop.


```ts
RollingNumber(_props)
```



```ts
export type RollingNumberStylesNames = 'root' | 'copyValue' | 'digit' | 'digitColumn' | 'char';

export type RollingNumberCssVariables = {
  root: '--rn-duration' | '--rn-timing-function';
};

export interface RollingNumberProps
  extends BoxProps, StylesApiProps<RollingNumberFactory>, ElementProps<'div'> {
  /** Number value to display */
  value: number;

  /** Prefix added before the value */
  prefix?: string;

  /** Suffix added after the value */
  suffix?: string;

  /** Character used as a decimal separator @default '.' */
  decimalSeparator?: string;

  /** Character used to separate thousands, set to `true` for `,` @default false */
  thousandSeparator?: string | boolean;

  /** Number of decimal places to display */
  decimalScale?: number;

  /** If set, trailing zeros are added to match `decimalScale` @default false */
  fixedDecimalScale?: boolean;

  /** Animation duration in milliseconds @default 600 */
  animationDuration?: number;

  /** CSS timing function for animation @default 'ease' */
  timingFunction?: string;

  /** If set, use tabular (monospace) numbers @default true */
  tabularNumbers?: boolean;

  /** If set, the root element acts as an `aria-live="polite"` region (`role="status"`) and screen readers announce every value change. When `false`, the root uses `role="img"` so the current value is still accessible but updates are not announced. @default false */
  withLiveRegion?: boolean;
}

export type RollingNumberFactory = Factory<{
  props: RollingNumberProps;
  ref: HTMLDivElement;
  stylesNames: RollingNumberStylesNames;
  vars: RollingNumberCssVariables;
}>;

export type Mod = Record<string, any> | string;

export type BoxMod = Mod | Mod[] | BoxMod[];

export interface BoxProps extends MantineStyleProps {
  /** Class added to the root element, if applicable */
  className?: string | undefined;

  /** Inline style added to root component element, can subscribe to theme defined on MantineProvider */
  style?: MantineStyleProp;

  /** CSS variables defined on root component element */
  __vars?: CssVarsProp;

  /** `size` property passed down the HTML element */
  __size?: string;

  /** Breakpoint above which the component is hidden with `display: none` */
  hiddenFrom?: MantineBreakpoint;

  /** Breakpoint below which the component is hidden with `display: none` */
  visibleFrom?: MantineBreakpoint;

  /** Determines whether component should be hidden in light color scheme with `display: none` */
  lightHidden?: boolean;

  /** Determines whether component should be hidden in dark color scheme with `display: none` */
  darkHidden?: boolean;

  /** Element modifiers transformed into `data-` attributes, for example, `{ 'data-size': 'xl' }`, falsy values are removed */
  mod?: BoxMod;
}

export type ElementProps<
  ElementType extends React.ElementType,
  PropsToOmit extends string = never,
> = Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>;

export interface CSSProperties extends React.CSSProperties {
  [key: string]: any;
}

type MantineStyle = CSSProperties | ((theme: MantineTheme) => CSSProperties);

export type MantineStyleProp = MantineStyle | MantineStyle[] | MantineStyleProp[] | undefined;

export type CssVariable = `--${string}`;

export type CssVariables<Variable extends string = CssVariable> = Partial<Record<Variable, string>>;

export type CssVars<Variable extends string = CssVariable> =
  | CssVariables<Variable>
  | ((theme: MantineTheme) => CssVariables<Variable>)
  | CssVars<Variable>[];

export type CssVarsProp<Variable extends string = CssVariable> =
  | CssVars<Variable>
  | CssVars<Variable>[];
```


### Native and external types

External types remain defined by React or native dependencies, not manually expanded into guessed props. The installed version's TypeScript definitions are authoritative.


```ts
Factory<{
  props: RollingNumberProps;
  ref: HTMLDivElement;
  stylesNames: RollingNumberStylesNames;
  vars: RollingNumberCssVariables;
}>
MantineStyleProps
React.CSSProperties
MantineTheme
Partial<Record<Variable, string>>
Record<Variable, string>
Variable
MantineBreakpoint
Record<string, any>
StylesApiProps<RollingNumberFactory>
React.ElementType
Omit<React.ComponentProps<ElementType>, 'style' | PropsToOmit>
React.ComponentProps<ElementType>
ElementType
PropsToOmit
HTMLDivElement
```

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