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"use client"
import { cn } from "@lib/utils"
import { AnimatePresence, motion } from "motion/react"
import type {
TargetAndTransition,
Transition,
Variant,
Variants,
} from "motion/react"
import React from "react"
export type PresetType = "blur" | "fade-in-blur" | "scale" | "fade" | "slide"
export type PerType = "word" | "char" | "line"
export type TextEffectProps = {
children: string
per?: PerType
as?: keyof React.JSX.IntrinsicElements
variants?: {
container?: Variants
item?: Variants
}
className?: string
preset?: PresetType
delay?: number
speedReveal?: number
speedSegment?: number
trigger?: boolean
onAnimationComplete?: () => void
onAnimationStart?: () => void
segmentWrapperClassName?: string
containerTransition?: Transition
segmentTransition?: Transition
style?: React.CSSProperties
}
const defaultStaggerTimes: Record<PerType, number> = {
char: 0.03,
word: 0.05,
line: 0.1,
}
const defaultContainerVariants: Variants = {
hidden: { opacity: 0 },
visible: {
opacity: 1,
transition: {
staggerChildren: 0.05,
},
},
exit: {
transition: { staggerChildren: 0.05, staggerDirection: -1 },
},
}
const defaultItemVariants: Variants = {
hidden: { opacity: 0 },
visible: {
opacity: 1,
},
exit: { opacity: 0 },
}
const presetVariants: Record<
PresetType,
{ container: Variants; item: Variants }
> = {
blur: {
container: defaultContainerVariants,
item: {
hidden: { opacity: 0, filter: "blur(12px)" },
visible: { opacity: 1, filter: "blur(0px)" },
exit: { opacity: 0, filter: "blur(12px)" },
},
},
"fade-in-blur": {
container: defaultContainerVariants,
item: {
hidden: { opacity: 0, y: 20, filter: "blur(12px)" },
visible: { opacity: 1, y: 0, filter: "blur(0px)" },
exit: { opacity: 0, y: 20, filter: "blur(12px)" },
},
},
scale: {
container: defaultContainerVariants,
item: {
hidden: { opacity: 0, scale: 0 },
visible: { opacity: 1, scale: 1 },
exit: { opacity: 0, scale: 0 },
},
},
fade: {
container: defaultContainerVariants,
item: {
hidden: { opacity: 0 },
visible: { opacity: 1 },
exit: { opacity: 0 },
},
},
slide: {
container: defaultContainerVariants,
item: {
hidden: { opacity: 0, y: 20 },
visible: { opacity: 1, y: 0 },
exit: { opacity: 0, y: 20 },
},
},
}
const AnimationComponent: React.FC<{
segment: string
variants: Variants
per: "line" | "word" | "char"
segmentWrapperClassName?: string
}> = React.memo(({ segment, variants, per, segmentWrapperClassName }) => {
const content =
per === "line" ? (
<motion.span variants={variants} className="block">
{segment}
</motion.span>
) : per === "word" ? (
<motion.span
aria-hidden="true"
variants={variants}
className="inline-block whitespace-pre"
>
{segment}
</motion.span>
) : (
<motion.span className="inline-block whitespace-pre">
{segment.split("").map((char, charIndex) => (
<motion.span
// biome-ignore lint/suspicious/noArrayIndexKey: Character position is stable within animation
key={`char-${charIndex}`}
aria-hidden="true"
variants={variants}
className="inline-block whitespace-pre"
>
{char}
</motion.span>
))}
</motion.span>
)
if (!segmentWrapperClassName) {
return content
}
const defaultWrapperClassName = per === "line" ? "block" : "inline-block"
return (
<span className={cn(defaultWrapperClassName, segmentWrapperClassName)}>
{content}
</span>
)
})
AnimationComponent.displayName = "AnimationComponent"
const splitText = (text: string, per: PerType) => {
if (per === "line") return text.split("\n")
return text.split(/(\s+)/)
}
const hasTransition = (
variant?: Variant,
): variant is TargetAndTransition & { transition?: Transition } => {
if (!variant) return false
return typeof variant === "object" && "transition" in variant
}
const createVariantsWithTransition = (
baseVariants: Variants,
transition?: Transition & { exit?: Transition },
): Variants => {
if (!transition) return baseVariants
const { exit: _, ...mainTransition } = transition
return {
...baseVariants,
visible: {
...baseVariants.visible,
transition: {
...(hasTransition(baseVariants.visible)
? baseVariants.visible.transition
: {}),
...mainTransition,
},
},
exit: {
...baseVariants.exit,
transition: {
...(hasTransition(baseVariants.exit)
? baseVariants.exit.transition
: {}),
...mainTransition,
staggerDirection: -1,
},
},
}
}
export function TextEffect({
children,
per = "word",
as = "p",
variants,
className,
preset = "fade",
delay = 0,
speedReveal = 1,
speedSegment = 1,
trigger = true,
onAnimationComplete,
onAnimationStart,
segmentWrapperClassName,
containerTransition,
segmentTransition,
style,
}: TextEffectProps) {
const segments = splitText(children, per)
const MotionTag = motion[as as keyof typeof motion] as typeof motion.div
const baseVariants = preset
? presetVariants[preset]
: { container: defaultContainerVariants, item: defaultItemVariants }
const stagger = defaultStaggerTimes[per] / speedReveal
const baseDuration = 0.3 / speedSegment
const customStagger = hasTransition(variants?.container?.visible ?? {})
? (variants?.container?.visible as TargetAndTransition).transition
?.staggerChildren
: undefined
const customDelay = hasTransition(variants?.container?.visible ?? {})
? (variants?.container?.visible as TargetAndTransition).transition
?.delayChildren
: undefined
const computedVariants = {
container: createVariantsWithTransition(
variants?.container || baseVariants.container,
{
staggerChildren: customStagger ?? stagger,
delayChildren: customDelay ?? delay,
...containerTransition,
exit: {
staggerChildren: customStagger ?? stagger,
staggerDirection: -1,
},
},
),
item: createVariantsWithTransition(variants?.item || baseVariants.item, {
duration: baseDuration,
...segmentTransition,
}),
}
return (
<AnimatePresence mode="popLayout">
{trigger && (
<MotionTag
initial="hidden"
animate="visible"
exit="exit"
variants={computedVariants.container}
className={className}
onAnimationComplete={onAnimationComplete}
onAnimationStart={onAnimationStart}
style={style}
>
{per !== "line" ? <span className="sr-only">{children}</span> : null}
{segments.map((segment, index) => (
<AnimationComponent
key={`${per}-${index}-${segment}`}
segment={segment}
variants={computedVariants.item}
per={per}
segmentWrapperClassName={segmentWrapperClassName}
/>
))}
</MotionTag>
)}
</AnimatePresence>
)
}
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