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Spring Scale in

Spring Scale in is a React and Tailwind CSS component from SmoothUI, licensed MIT. Copy it and paste it into your project.

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What it is

Spring Scale in is a React and Tailwind CSS component from SmoothUI, licensed MIT. Copy it and paste it into your project.

How to use it

Open it in the catalogue, press copy, and paste it into your project. The prompt you copy carries the code and the rules that tell your agent to reproduce it without changing anything.

Open in the catalogue

Five free copies a month. No card.

Needs

npm i motion

Licence

This component comes from SmoothUI and is redistributed under the MIT licence, which permits commercial use. The copyright notice travels with the code.

Spring Scale in

index.tsx
"use client";

import { motion, useInView, useReducedMotion } from "motion/react";
import { useRef } from "react";

/**
 * SpringScaleIn — per-word scale-in with a soft overshoot, iOS app icon-style pop.
 * From the animate-text catalog (`spring-scale-in`).
 */
export interface SpringScaleInProps {
  children: string;
  className?: string;
  /** Delay before the animation starts, in milliseconds. */
  delay?: number;
  /** Per-word stagger, in milliseconds. */
  stagger?: number;
  /** Animate only once the text scrolls into view. */
  triggerOnView?: boolean;
}

const DURATION_S = 0.36;
const MS = 1000;
const EASE = [0.34, 1.56, 0.64, 1] as const;

export default function SpringScaleIn({
  children,
  className = "",
  delay = 0,
  stagger = 95,
  triggerOnView = false,
}: SpringScaleInProps) {
  const ref = useRef<HTMLSpanElement>(null);
  const inView = useInView(ref, { once: true });
  const shouldReduceMotion = useReducedMotion();
  const play = (!triggerOnView || inView) && !shouldReduceMotion;
  const words = children.split(" ");

  return (
    <span aria-label={children} className={className} ref={ref}>
      {words.map((word, index) => (
        // biome-ignore lint/suspicious/noArrayIndexKey: words have no stable id
        <span key={index}>
          <motion.span
            animate={play ? { opacity: 1, scale: 1 } : undefined}
            aria-hidden="true"
            initial={
              shouldReduceMotion ? { opacity: 1 } : { opacity: 0, scale: 0.7 }
            }
            style={{ display: "inline-block", whiteSpace: "pre" }}
            transition={
              shouldReduceMotion
                ? { duration: 0 }
                : {
                    delay: delay / MS + (index * stagger) / MS,
                    duration: DURATION_S,
                    ease: EASE,
                  }
            }
          >
            {word}
          </motion.span>
          {index < words.length - 1 && (
            <span
              aria-hidden="true"
              style={{ display: "inline-block", whiteSpace: "pre" }}
            >
              {" "}
            </span>
          )}
        </span>
      ))}
    </span>
  );
}

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