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Number Ticker

Smoothly interpolate between supplied numeric values.

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Make it yours.

Install the editable source and its dependencies into your React + Tailwind project.

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pnpm dlx shadcn@4.0.8 add http://localhost:3000/r/number-ticker.json

Use it

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"use client";
import {useState} from 'react';
import {Badge} from '@/components/jez-ui/ui/badge';
import {NumberTicker} from '@/components/jez-ui/ui/number-ticker';
import {Button} from '@/components/jez-ui/ui/button';
import {Plus} from 'lucide-react';

export default function Example(){
const [count,setCount]=useState(128);
return <><div className="grid w-full max-w-md gap-7"><div className="flex items-center justify-between"><h3 className="text-2xl">A growing idea.</h3><Badge tone="positive">Live demo</Badge></div><NumberTicker value={count} className="font-display text-8xl tracking-tight"/><div className="flex items-center justify-between border-t border-border pt-5"><p className="text-sm text-muted-foreground">People on the list</p><Button variant="outline" onClick={()=>setCount(c=>c+17)}>Add 17 <Plus size={14}/></Button></div></div></>;
}

Props & types

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{
  value: number;
  decimals?: number;
  className?: string;
}

Source

View 2 source files

registry/ui/number-ticker.tsx

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"use client";
import * as React from "react";
import { cn } from "./utils";
import { animate, useReducedMotion } from "motion/react";
export function NumberTicker({
  value,
  decimals = 0,
  className,
}: {
  value: number;
  decimals?: number;
  className?: string;
}) {
  const [display, setDisplay] = React.useState(value);
  const previous = React.useRef(value);
  const reduce = useReducedMotion();
  React.useEffect(() => {
    const controls = animate(previous.current, value, {
      duration: reduce ? 0 : 0.6,
      onUpdate: setDisplay,
    });
    previous.current = value;
    return () => controls.stop();
  }, [value, reduce]);
  return (
    <span
      className={cn("tabular-nums", className)}
      aria-label={value.toFixed(decimals)}
    >
      <span aria-hidden="true">{display.toFixed(decimals)}</span>
    </span>
  );
}

registry/ui/utils.ts

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import { clsx, type ClassValue } from "clsx";
import { twMerge } from "tailwind-merge";
export function cn(...values: ClassValue[]) {
  return twMerge(clsx(values));
}

Dependencies

motion@13.2.0 · clsx@2.1.1 · tailwind-merge@3.5.0 · lucide-react@0.577.0

Accessibility & behaviour

Respect reduced-motion preferences. Decorative effects must not carry essential information. WebGL scenes include a static fallback and only render while visible.

Read the accessibility and performance guide →