ant-design/components/badge/ScrollNumber.tsx

import classNames from 'classnames';
import * as React from 'react';
import { ConfigContext } from '../config-provider';
import { cloneElement } from '../_util/reactNode';
import SingleNumber from './SingleNumber';

export interface ScrollNumberProps {
  prefixCls?: string;
  className?: string;
  motionClassName?: string;
  count?: string | number | null;
  children?: React.ReactElement<HTMLElement>;
  component?: React.ComponentType<any>;
  style?: React.CSSProperties;
  title?: string | number | null;
  show: boolean;
}

export interface ScrollNumberState {
  animateStarted?: boolean;
  count?: string | number | null;
}

const ScrollNumber = React.forwardRef<React.Ref<HTMLDivElement>, ScrollNumberProps>(
  (
    {
      prefixCls: customizePrefixCls,
      count,
      className,
      motionClassName,
      style,
      title,
      show,
      component: Component = 'sup',
      children,
      ...restProps
    },
    ref,
  ) => {
    const { getPrefixCls } = React.useContext(ConfigContext);
    const prefixCls = getPrefixCls('scroll-number', customizePrefixCls);

    // ============================ Render ============================
    const newProps = {
      ...restProps,
      'data-show': show,
      style,
      className: classNames(prefixCls, className, motionClassName),
      title: title as string,
    };

    // Only integer need motion
    let numberNodes: React.ReactNode = count;
    if (count && Number(count) % 1 === 0) {
      const numberList = String(count).split('');

      numberNodes = numberList.map((num, i) => (
        <SingleNumber
          prefixCls={prefixCls}
          count={Number(count)}
          value={num}
          // eslint-disable-next-line react/no-array-index-key
          key={numberList.length - i}
        />
      ));
    }

    // allow specify the border
    // mock border-color by box-shadow for compatible with old usage:
    // <Badge count={4} style={{ backgroundColor: '#fff', color: '#999', borderColor: '#d9d9d9' }} />
    if (style && style.borderColor) {
      newProps.style = {
        ...style,
        boxShadow: `0 0 0 1px ${style.borderColor} inset`,
      };
    }
    if (children) {
      return cloneElement(children, (oriProps) => ({
        className: classNames(
          `${prefixCls}-custom-component`,
          oriProps?.className,
          motionClassName,
        ),
      }));
    }

    return (
      <Component {...newProps} ref={ref}>
        {numberNodes}
      </Component>
    );
  },
);

export default ScrollNumber;