Are the ai2 Liquid toggles free?

Yes. The whole styled layer is free and MIT licensed, like the component core.

Do they respect reduced motion?

Yes. Under prefers-reduced-motion, the morph and flow stop and the thumb jumps.

Can I change the size?

Yes. Every variation takes a size prop of sm, md, lg or xl, aligned to the base Button height scale.

Liquid toggles

Five liquid switches: a liquid fill, a blob, a drop, a wave and mercury. Each is sized, token-driven and keyboard accessible with role switch.

TogglesLiquid

Installation

The styled layer is free and installs like any other ai2 component.

Run the following command

npx shadcn@latest add @ai2/toggles-liquid

Dependencies, the @ai2/tokens theme and the component file are installed together.

Install dependencies

npm install motion

Copy the source

components/ui/toggles-liquid.tsx

"use client"

import * as React from "react"
import { motion, useReducedMotion } from "motion/react"

import { cn } from "@/lib/utils"

/* Liquid toggle family: 5 liquid switches. role="switch", keyboard accessible. Color
   comes ONLY from tokens. The thumb slides with the framer-motion `layout` and
   switches instantly under reduced-motion; the morph/flow stops under
   reduced-motion. Uncontrolled/controlled. */

export type StyledSize = "sm" | "md" | "lg" | "xl"

const trackSize: Record<StyledSize, string> = {
  sm: "h-5 w-9 p-0.5",
  md: "h-6 w-11 p-0.5",
  lg: "h-7 w-[52px] p-1",
  xl: "h-8 w-[60px] p-1",
}
const thumbSize: Record<StyledSize, string> = {
  sm: "size-4",
  md: "size-5",
  lg: "size-5",
  xl: "size-6",
}

const trackBase =
  "relative inline-flex shrink-0 cursor-pointer items-center outline-none focus-visible:ring-[3px] focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50"

interface ToggleProps extends Omit<React.ComponentProps<"button">, "onChange"> {
  size?: StyledSize
  checked?: boolean
  defaultChecked?: boolean
  onCheckedChange?: (checked: boolean) => void
}

function useToggle(props: ToggleProps) {
  const { checked, defaultChecked, onCheckedChange } = props
  const reduce = useReducedMotion()
  const [internal, setInternal] = React.useState(defaultChecked ?? false)
  const on = checked ?? internal
  const toggle = () => {
    if (checked === undefined) setInternal((v) => !v)
    onCheckedChange?.(!on)
  }
  const spring = reduce ? { duration: 0 } : ({ type: "spring", stiffness: 500, damping: 30 } as const)
  return { on, toggle, spring }
}

function stripToggleProps(props: ToggleProps) {
  const { checked, defaultChecked, onCheckedChange, size, className, children, ...rest } = props
  return rest
}

/* Liquid: dolgu toggle sirasinda sivi gibi akar. */
export function LiquidToggle(props: ToggleProps) {
  const { on, toggle, spring } = useToggle(props)
  const size = props.size ?? "md"
  return (
    <button
      type="button"
      role="switch"
      aria-checked={on}
      data-slot="styled-toggle"
      onClick={toggle}
      className={cn(trackBase, trackSize[size], "overflow-hidden rounded-full bg-input", on ? "justify-end" : "justify-start", props.className)}
      {...stripToggleProps(props)}
    >
      <motion.span
        aria-hidden
        className="pointer-events-none absolute inset-0 rounded-full bg-primary"
        initial={false}
        animate={{ clipPath: on ? "circle(140% at 100% 50%)" : "circle(0% at 100% 50%)" }}
        transition={spring}
      />
      <motion.span layout transition={spring} className={cn(thumbSize[size], "relative z-10 rounded-full bg-background shadow-sm")} />
    </button>
  )
}

/* Blob: morph eden blob basparmak. */
export function BlobToggle(props: ToggleProps) {
  const { on, toggle, spring } = useToggle(props)
  const reduce = useReducedMotion()
  const size = props.size ?? "md"
  return (
    <button
      type="button"
      role="switch"
      aria-checked={on}
      data-slot="styled-toggle"
      onClick={toggle}
      className={cn(trackBase, trackSize[size], "rounded-full transition-colors", on ? "justify-end bg-success" : "justify-start bg-input", props.className)}
      {...stripToggleProps(props)}
    >
      <motion.span
        layout
        className={cn(thumbSize[size], "bg-background shadow-sm")}
        animate={
          reduce
            ? { borderRadius: "50%" }
            : { borderRadius: on ? ["50%", "60% 40% 55% 45%", "50%"] : ["50%", "45% 55% 40% 60%", "50%"] }
        }
        transition={{ layout: spring, borderRadius: reduce ? { duration: 0 } : { duration: 0.7, ease: "easeInOut" } }}
        style={{ borderRadius: "50%" }}
      />
    </button>
  )
}

/* Drop: damla seklinde basparmak. */
export function DropToggle(props: ToggleProps) {
  const { on, toggle, spring } = useToggle(props)
  const reduce = useReducedMotion()
  const size = props.size ?? "md"
  return (
    <button
      type="button"
      role="switch"
      aria-checked={on}
      data-slot="styled-toggle"
      onClick={toggle}
      className={cn(trackBase, trackSize[size], "rounded-full transition-colors", on ? "justify-end bg-info" : "justify-start bg-input", props.className)}
      {...stripToggleProps(props)}
    >
      <motion.span
        layout
        transition={spring}
        animate={reduce ? { rotate: 0 } : { rotate: on ? 135 : -45 }}
        className={cn(thumbSize[size], "bg-background shadow-sm")}
        style={{ borderRadius: "50% 50% 50% 0" }}
      />
    </button>
  )
}

/* Wave: acikken izi bir dalga doldurur. */
export function WaveToggle(props: ToggleProps) {
  const { on, toggle, spring } = useToggle(props)
  const reduce = useReducedMotion()
  const size = props.size ?? "md"
  return (
    <button
      type="button"
      role="switch"
      aria-checked={on}
      data-slot="styled-toggle"
      onClick={toggle}
      className={cn(trackBase, trackSize[size], "overflow-hidden rounded-full bg-input", on ? "justify-end" : "justify-start", props.className)}
      {...stripToggleProps(props)}
    >
      <motion.span
        aria-hidden
        className="pointer-events-none absolute inset-y-0 left-0 bg-info"
        initial={false}
        animate={{ width: on ? "100%" : "0%" }}
        transition={spring}
      >
        <motion.span
          className="absolute top-0 right-0 h-full w-2 translate-x-1/2 rounded-full bg-info"
          animate={reduce || !on ? { y: 0 } : { y: ["-12%", "12%", "-12%"] }}
          transition={reduce || !on ? { duration: 0 } : { duration: 1.2, repeat: Infinity, ease: "easeInOut" }}
        />
      </motion.span>
      <motion.span layout transition={spring} className={cn(thumbSize[size], "relative z-10 rounded-full bg-background shadow-sm")} />
    </button>
  )
}

/* Mercury: metalik sivi basparmak, kayarken uzar. */
export function MercuryToggle(props: ToggleProps) {
  const { on, toggle, spring } = useToggle(props)
  const reduce = useReducedMotion()
  const size = props.size ?? "md"
  return (
    <button
      type="button"
      role="switch"
      aria-checked={on}
      data-slot="styled-toggle"
      onClick={toggle}
      className={cn(trackBase, trackSize[size], "rounded-full transition-colors", on ? "justify-end bg-primary" : "justify-start bg-input", props.className)}
      {...stripToggleProps(props)}
    >
      <motion.span
        layout
        transition={spring}
        animate={reduce ? { scaleX: 1 } : { scaleX: [1, 1.5, 1] }}
        className={cn(thumbSize[size], "rounded-full")}
        style={{
          background: "linear-gradient(160deg, color-mix(in oklab, var(--background) 92%, transparent), color-mix(in oklab, var(--foreground) 22%, transparent))",
          boxShadow: "inset 0 1px 1px 0 color-mix(in oklab, var(--background) 90%, transparent), 0 1px 2px 0 color-mix(in oklab, var(--foreground) 30%, transparent)",
        }}
      />
    </button>
  )
}

Manual installs skip the @ai2/tokens theme, so add the token CSS from the theming guide or the tone colors will be missing.

Variations

5 takes on the same idea. Each is its own export, and every one accepts a size prop (sm, md, lg, xl) aligned to the base Button scale.

Liquid

The fill flows like liquid as it toggles.

Blob

A morphing blob thumb.

Drop

A droplet thumb.

Wave

A wave fills the track when on.

Mercury

A metallic liquid thumb that stretches as it moves.

ai2 Liquid toggles: 5 styled variations on the token system

The ai2 Liquid toggles are a set of 5 decorative button variations from the styled layer of the @ai2 design system, built around liquid-styled switches. They are free and MIT licensed, and every color comes from a semantic token, so they theme with the rest of ai2 in light and dark.

Motion runs on framer-motion: framer-motion morphs the blob and flows the fill as the thumb slides. The styled layer is opt-in, so the dependency only lands if you use it; the base components stay lean. Under reduced motion, the morph and flow stop and the thumb jumps.

What is in the ai2 Liquid toggles?

5 exports in one file: Liquid, Blob, Drop, Wave and Mercury. Each renders a native button and takes a size prop (sm, md, lg, xl) aligned to the base Button. They are separate from the base Button on purpose: the base keeps its clean variant, tone and size axes, while the styled layer carries the effects.

You own the file. Copy the one category file and you have all 5 variations, with no runtime dependency on ai2 itself.

Why use it

On-system by construction: Every color resolves to an ai2 semantic token, so the buttons follow your theme in light and dark with no extra work.
Effect without the sprawl: The decorations live in a dedicated styled file, so the base Button keeps its clean, predictable API.
Accessible and honest: Each renders a real button element, keeps a visible focus ring, and respects prefers-reduced-motion.

Features

Token-driven color: No hardcoded hex or oklch; the look recolors with your theme tokens.
framer-motion: framer-motion morphs the blob and flows the fill as the thumb slides.
Reduced-motion aware: Under prefers-reduced-motion, the morph and flow stop and the thumb jumps.
Size aligned to the base: Every variation takes sm, md, lg and xl matching the base Button height scale, so styled and base buttons line up in a row.

Production tips

Use it for emphasis, not everywhere: Styled buttons draw the eye. Reserve them for the one action you want people to take on a screen, and use the base Button for the rest.
Keep labels as verbs: The decoration adds weight, so a clear action label keeps the button scannable.
Pick one variation per surface: The variations share a family; using two different ones in the same view competes for attention.

Works with the rest of ai2

The Liquid toggles sit alongside the base Button and the rest of the @ai2 registry. They share the same token file, so a styled action next to a base button or a badge stays visually consistent in both modes.