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Screensaver

Screensaver is a React and Tailwind CSS component from Fancy Components, licensed MIT. Copy it and paste it into your project.

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What it is

Screensaver is a React and Tailwind CSS component from Fancy Components, 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 Fancy Components and is redistributed under the MIT licence, which permits commercial use. The copyright notice travels with the code.

Screensaver

fancy/blocks/screensaver.tsx
"use client"

import React, { useEffect, useRef } from "react"
import {
  motion,
  useAnimationFrame,
  useMotionValue,
} from "motion/react"

import { cn } from "@/lib/utils"
import { useDimensions } from "@/hooks/use-dimensions"

type ScreensaverProps = {
  children: React.ReactNode
  containerRef: React.RefObject<HTMLElement | null>
  speed?: number
  startPosition?: { x: number; y: number } // x,y as percentages (0-100)
  startAngle?: number // in degrees
  className?: string
}

const Screensaver: React.FC<ScreensaverProps> = ({
  children,
  speed = 3,
  startPosition = { x: 0, y: 0 },
  startAngle = 45,
  containerRef,
  className,
}) => {
  const elementRef = useRef<HTMLDivElement>(null)
  const x = useMotionValue(0)
  const y = useMotionValue(0)
  const angle = useRef((startAngle * Math.PI) / 180)

  const containerDimensions = useDimensions(containerRef)
  const elementDimensions = useDimensions(elementRef)

  // Set initial position based on container dimensions and percentage
  useEffect(() => {
    if (containerDimensions.width && containerDimensions.height) {
      const initialX =
        (startPosition.x / 100) *
        (containerDimensions.width - (elementDimensions.width || 0))
      const initialY =
        (startPosition.y / 100) *
        (containerDimensions.height - (elementDimensions.height || 0))
      x.set(initialX)
      y.set(initialY)
    }
  }, [containerDimensions, elementDimensions, startPosition])

  useAnimationFrame(() => {
    const velocity = speed
    const dx = Math.cos(angle.current) * velocity
    const dy = Math.sin(angle.current) * velocity

    let newX = x.get() + dx
    let newY = y.get() + dy

    // Check for collisions with container boundaries
    if (
      newX <= 0 ||
      newX + elementDimensions.width >= containerDimensions.width
    ) {
      angle.current = Math.PI - angle.current
      newX = Math.max(
        0,
        Math.min(newX, containerDimensions.width - elementDimensions.width)
      )
    }
    if (
      newY <= 0 ||
      newY + elementDimensions.height >= containerDimensions.height
    ) {
      angle.current = -angle.current
      newY = Math.max(
        0,
        Math.min(newY, containerDimensions.height - elementDimensions.height)
      )
    }

    x.set(newX)
    y.set(newY)
  })

  return (
    <motion.div
      ref={elementRef}
      style={{
        position: "absolute",
        top: 0,
        left: 0,
        x,
        y,
      }}
      className={cn("transform will-change-transform", className)}
    >
      {children}
    </motion.div>
  )
}

export default Screensaver

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