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Scramble in

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

Fancy Components MIT text

What it is

Scramble in is a React and Tailwind CSS text 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.

No packages beyond the project baseline

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.

Scramble in

fancy/text/scramble-in.tsx
"use client"

import {
  forwardRef,
  useCallback,
  useEffect,
  useImperativeHandle,
  useState,
} from "react"

interface ScrambleInProps {
  text: string
  scrambleSpeed?: number
  scrambledLetterCount?: number
  characters?: string
  className?: string
  scrambledClassName?: string
  autoStart?: boolean
  onStart?: () => void
  onComplete?: () => void
}

export interface ScrambleInHandle {
  start: () => void
  reset: () => void
}

const ScrambleIn = forwardRef<ScrambleInHandle, ScrambleInProps>(
  (
    {
      text,
      scrambleSpeed = 50,
      scrambledLetterCount = 2,
      characters = "abcdefghijklmnopqrstuvwxyz!@#$%^&*()_+",
      className = "",
      scrambledClassName = "",
      autoStart = true,
      onStart,
      onComplete,
    },
    ref
  ) => {
    const [displayText, setDisplayText] = useState("")
    const [isAnimating, setIsAnimating] = useState(false)
    const [visibleLetterCount, setVisibleLetterCount] = useState(0)
    const [scrambleOffset, setScrambleOffset] = useState(0)

    const startAnimation = useCallback(() => {
      setIsAnimating(true)
      setVisibleLetterCount(0)
      setScrambleOffset(0)
      onStart?.()
    }, [onStart])

    const reset = useCallback(() => {
      setIsAnimating(false)
      setVisibleLetterCount(0)
      setScrambleOffset(0)
      setDisplayText("")
    }, [])

    useImperativeHandle(ref, () => ({
      start: startAnimation,
      reset,
    }))

    useEffect(() => {
      if (autoStart) {
        startAnimation()
      }
    }, [autoStart, startAnimation])

    useEffect(() => {
      let interval: NodeJS.Timeout

      if (isAnimating) {
        interval = setInterval(() => {
          // Increase visible text length
          if (visibleLetterCount < text.length) {
            setVisibleLetterCount((prev) => prev + 1)
          }
          // Start sliding scrambled text out
          else if (scrambleOffset < scrambledLetterCount) {
            setScrambleOffset((prev) => prev + 1)
          }
          // Complete animation
          else {
            clearInterval(interval)
            setIsAnimating(false)
            onComplete?.()
          }

          // Calculate how many scrambled letters we can show
          const remainingSpace = Math.max(0, text.length - visibleLetterCount)
          const currentScrambleCount = Math.min(
            remainingSpace,
            scrambledLetterCount
          )

          // Generate scrambled text
          const scrambledPart = Array(currentScrambleCount)
            .fill(0)
            .map(
              () => characters[Math.floor(Math.random() * characters.length)]
            )
            .join("")

          setDisplayText(text.slice(0, visibleLetterCount) + scrambledPart)
        }, scrambleSpeed)
      }

      return () => {
        if (interval) clearInterval(interval)
      }
    }, [
      isAnimating,
      text,
      visibleLetterCount,
      scrambleOffset,
      scrambledLetterCount,
      characters,
      scrambleSpeed,
      onComplete,
    ])

    const renderText = () => {
      const revealed = displayText.slice(0, visibleLetterCount)
      const scrambled = displayText.slice(visibleLetterCount)

      return (
        <>
          <span className={className}>{revealed}</span>
          <span className={scrambledClassName}>{scrambled}</span>
        </>
      )
    }

    return (
      <>
        <span className="sr-only">{text}</span>
        <span className="inline-block whitespace-pre-wrap" aria-hidden="true">
          {renderText()}
        </span>
      </>
    )
  }
)

ScrambleIn.displayName = "ScrambleIn"
export default ScrambleIn

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