Slider

TSX
"use client";

import { useState } from "react";

import { Label } from "@/components/ui/label";
import { Slider } from "@/components/ui/slider";

export default function Slider01() {
  const [opacity, setOpacity] = useState(72);

  return (
    <div className="flex w-full max-w-sm flex-col gap-3">
      <div className="flex items-center justify-between gap-4">
        <Label id="slider-01-label">Layer opacity</Label>
        <span
          aria-hidden="true"
          className="text-sm font-medium tabular-nums text-muted-foreground"
        >
          {opacity}%
        </span>
      </div>
      <Slider
        aria-labelledby="slider-01-label"
        value={[opacity]}
        onValueChange={(value) =>
          setOpacity(typeof value === "number" ? value : value[0])
        }
      />
      <div
        aria-hidden="true"
        className="flex justify-between text-xs tabular-nums text-muted-foreground"
      >
        <span>0%</span>
        <span>100%</span>
      </div>
    </div>
  );
}

TSX
"use client";

import { useState } from "react";

import { Slider } from "@/components/ui/slider";

const sizes = [
  {
    id: "slider-02-sm",
    size: "Small",
    label: "Timeline zoom",
    hint: "Dense toolbars and inspector panels",
    defaultValue: 35,
    className:
      "[&_[data-slot=slider-thumb]]:size-2.5 [&_[data-slot=slider-track]]:h-0.5!",
  },
  {
    id: "slider-02-md",
    size: "Default",
    label: "Brush size",
    hint: "Forms and settings pages",
    defaultValue: 55,
    className: "",
  },
  {
    id: "slider-02-lg",
    size: "Large",
    label: "Playback volume",
    hint: "Touch surfaces and media controls",
    defaultValue: 70,
    className:
      "[&_[data-slot=slider-thumb]]:size-5 [&_[data-slot=slider-thumb]]:border-2 [&_[data-slot=slider-track]]:h-2!",
  },
];

export default function Slider02() {
  const [values, setValues] = useState(sizes.map((item) => item.defaultValue));

  return (
    <div className="flex w-full max-w-sm flex-col divide-y divide-border">
      {sizes.map((item, index) => (
        <div key={item.id} className="flex flex-col gap-3 py-4 first:pt-0 last:pb-0">
          <div className="flex items-baseline justify-between gap-4">
            <div className="flex min-w-0 flex-col gap-0.5">
              <span id={item.id} className="text-sm font-medium">
                {item.label}
              </span>
              <span className="text-xs text-muted-foreground">
                {item.size} · {item.hint}
              </span>
            </div>
            <span
              aria-hidden="true"
              className="text-sm tabular-nums text-muted-foreground"
            >
              {values[index]}
            </span>
          </div>
          <Slider
            aria-labelledby={item.id}
            className={item.className}
            value={[values[index]]}
            onValueChange={(value) =>
              setValues((current) =>
                current.map((entry, i) =>
                  i === index
                    ? typeof value === "number"
                      ? value
                      : value[0]
                    : entry,
                ),
              )
            }
          />
        </div>
      ))}
    </div>
  );
}

TSX
"use client";

import { Volume1Icon, Volume2Icon, VolumeXIcon } from "lucide-react";
import { useState } from "react";

import { Button } from "@/components/ui/button";
import { Slider } from "@/components/ui/slider";

const STEP = 10;

export default function Slider03() {
  const [volume, setVolume] = useState(60);
  const [muted, setMuted] = useState(false);

  const level = muted ? 0 : volume;
  const LevelIcon =
    level === 0 ? VolumeXIcon : level < 50 ? Volume1Icon : Volume2Icon;

  function update(next: number) {
    setVolume(Math.min(100, Math.max(0, next)));
    setMuted(false);
  }

  return (
    <div className="flex w-full max-w-sm flex-col gap-2">
      <span id="slider-03-label" className="text-sm font-medium">
        Speaker volume
      </span>
      <div className="flex items-center gap-2">
        <Button
          variant="ghost"
          size="icon-sm"
          aria-label={muted ? "Unmute" : "Mute"}
          aria-pressed={muted}
          onClick={() => setMuted((current) => !current)}
        >
          <LevelIcon aria-hidden="true" />
        </Button>
        <Slider
          aria-labelledby="slider-03-label"
          className="flex-1"
          step={1}
          value={[level]}
          onValueChange={(value) =>
            update(typeof value === "number" ? value : value[0])
          }
        />
        <Button
          variant="ghost"
          size="icon-sm"
          aria-label={`Increase volume by ${STEP}%`}
          disabled={!muted && volume >= 100}
          // While muted, step up from the remembered volume, not from zero.
          onClick={() => update(volume + STEP)}
        >
          <Volume2Icon aria-hidden="true" />
        </Button>
        <span
          aria-hidden="true"
          className="w-9 text-right text-sm tabular-nums text-muted-foreground"
        >
          {level}%
        </span>
      </div>
    </div>
  );
}

TSX
"use client";

import { useState } from "react";

import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Slider } from "@/components/ui/slider";

const MIN = 0;
const MAX = 2000;
const STEP = 50;
const MIN_GAP_STEPS = 2;
const GAP = STEP * MIN_GAP_STEPS;

const currency = new Intl.NumberFormat("en-US", {
  style: "currency",
  currency: "USD",
  maximumFractionDigits: 0,
});

export default function Slider04() {
  const [range, setRange] = useState<[number, number]>([400, 1200]);
  const [drafts, setDrafts] = useState(["400", "1200"]);

  function applyRange(next: [number, number]) {
    setRange(next);
    setDrafts([String(next[0]), String(next[1])]);
  }

  function commitDraft(index: 0 | 1) {
    const parsed = Math.round(Number(drafts[index]) / STEP) * STEP;
    if (drafts[index].trim() === "" || Number.isNaN(parsed)) {
      applyRange(range);
      return;
    }
    if (index === 0) {
      applyRange([Math.min(Math.max(MIN, parsed), range[1] - GAP), range[1]]);
    } else {
      applyRange([range[0], Math.max(Math.min(MAX, parsed), range[0] + GAP)]);
    }
  }

  return (
    <div className="flex w-full max-w-sm flex-col gap-4">
      <div className="flex items-baseline justify-between gap-4">
        <span id="slider-04-label" className="text-sm font-medium">
          Project budget
        </span>
        <span
          aria-hidden="true"
          className="text-sm tabular-nums text-muted-foreground"
        >
          {currency.format(range[0])} – {currency.format(range[1])}
        </span>
      </div>
      <Slider
        aria-labelledby="slider-04-label"
        min={MIN}
        max={MAX}
        step={STEP}
        minStepsBetweenValues={MIN_GAP_STEPS}
        value={range}
        onValueChange={(value) => {
          if (typeof value !== "number") applyRange([value[0], value[1]]);
        }}
      />
      <div className="grid grid-cols-2 gap-3">
        {(["Minimum", "Maximum"] as const).map((label, i) => {
          const index = i as 0 | 1;
          const id = `slider-04-${label.toLowerCase()}`;
          return (
            <div key={label} className="flex flex-col gap-1.5">
              <Label htmlFor={id} className="text-xs text-muted-foreground">
                {label}
              </Label>
              <div className="relative">
                <span
                  aria-hidden="true"
                  className="pointer-events-none absolute inset-y-0 left-2.5 flex items-center text-sm text-muted-foreground"
                >
                  $
                </span>
                <Input
                  id={id}
                  inputMode="numeric"
                  className="pl-6 tabular-nums"
                  value={drafts[index]}
                  onChange={(event) =>
                    setDrafts((current) =>
                      current.map((draft, j) =>
                        j === index ? event.target.value : draft,
                      ),
                    )
                  }
                  onBlur={() => commitDraft(index)}
                  onKeyDown={(event) => {
                    if (event.key === "Enter") commitDraft(index);
                  }}
                />
              </div>
            </div>
          );
        })}
      </div>
      <p className="text-pretty text-xs text-muted-foreground">
        Rounded to the nearest {currency.format(STEP)}, with at least{" "}
        {currency.format(GAP)} between the two limits.
      </p>
    </div>
  );
}

TSX
"use client";

import { CircleAlertIcon, CircleCheckIcon, LockIcon } from "lucide-react";
import { useState } from "react";

import { Skeleton } from "@/components/ui/skeleton";
import { Slider } from "@/components/ui/slider";

const PLAN_LIMIT = 8;

export default function Slider05() {
  const [builds, setBuilds] = useState(6);
  const overLimit = builds > PLAN_LIMIT;

  return (
    <div className="flex w-full max-w-sm flex-col divide-y divide-border">
      <div className="flex flex-col gap-3 pb-5">
        <div className="flex items-baseline justify-between gap-4">
          <span id="slider-05-builds" className="text-sm font-medium">
            Concurrent builds
          </span>
          <span
            aria-hidden="true"
            className={
              overLimit
                ? "text-sm font-medium tabular-nums text-destructive"
                : "text-sm tabular-nums text-muted-foreground"
            }
          >
            {builds} / {PLAN_LIMIT}
          </span>
        </div>
        <Slider
          aria-labelledby="slider-05-builds"
          aria-describedby="slider-05-builds-status"
          aria-invalid={overLimit || undefined}
          className={
            overLimit
              ? "[&_[data-slot=slider-range]]:bg-destructive [&_[data-slot=slider-thumb]]:border-destructive [&_[data-slot=slider-thumb]]:ring-destructive/30"
              : undefined
          }
          min={1}
          max={12}
          value={[builds]}
          onValueChange={(value) =>
            setBuilds(typeof value === "number" ? value : value[0])
          }
        />
        <p
          id="slider-05-builds-status"
          aria-live="polite"
          className={
            overLimit
              ? "flex items-center gap-1.5 text-xs text-destructive"
              : "flex items-center gap-1.5 text-xs text-muted-foreground"
          }
        >
          {overLimit ? (
            <>
              <CircleAlertIcon aria-hidden="true" className="size-3.5 shrink-0" />
              {builds - PLAN_LIMIT} over the Pro plan limit. Extra builds will
              queue until you upgrade.
            </>
          ) : (
            <>
              <CircleCheckIcon
                aria-hidden="true"
                className="size-3.5 shrink-0 text-success"
              />
              Within your Pro plan limit.
            </>
          )}
        </p>
      </div>

      <div className="flex flex-col gap-3 py-5">
        <div className="flex items-baseline justify-between gap-4">
          <span
            id="slider-05-upload"
            className="flex items-center gap-1.5 text-sm font-medium text-muted-foreground"
          >
            <LockIcon aria-hidden="true" className="size-3.5" />
            Max upload size
          </span>
          <span
            aria-hidden="true"
            className="text-sm tabular-nums text-muted-foreground"
          >
            250 MB
          </span>
        </div>
        <Slider
          aria-labelledby="slider-05-upload"
          aria-describedby="slider-05-upload-hint"
          disabled
          min={10}
          max={1000}
          step={10}
          defaultValue={[250]}
        />
        <p id="slider-05-upload-hint" className="text-xs text-muted-foreground">
          Set by your workspace policy. Ask an admin to change it.
        </p>
      </div>

      <div aria-busy="true" className="flex flex-col gap-3 pt-5">
        <div className="flex items-baseline justify-between gap-4">
          <span className="text-sm font-medium">API rate limit</span>
          <Skeleton className="h-4 w-14" />
        </div>
        <Skeleton className="h-3 w-full rounded-full" />
        <p className="text-xs text-muted-foreground">Loading current limits…</p>
      </div>
    </div>
  );
}

TSX
"use client";

import { useState } from "react";

import { cn } from "cn";

import { Slider } from "@/components/ui/slider";

const lengths = [
  { label: "Brief", detail: "One or two sentences, straight to the answer." },
  { label: "Balanced", detail: "A short paragraph with the key reasoning." },
  { label: "Detailed", detail: "Step-by-step explanation with examples." },
  { label: "Thorough", detail: "Full walkthrough, edge cases, and sources." },
];

const last = lengths.length - 1;

export default function Slider06() {
  const [index, setIndex] = useState(1);

  return (
    <div className="flex w-full max-w-sm flex-col gap-4">
      <div className="flex flex-col gap-1">
        <span id="slider-06-label" className="text-sm font-medium">
          Response length
        </span>
        <p aria-live="polite" className="text-xs text-muted-foreground">
          <span className="font-medium text-foreground">
            {lengths[index].label}:
          </span>{" "}
          {lengths[index].detail}
        </p>
      </div>
      <div className="flex flex-col gap-2">
        <Slider
          aria-labelledby="slider-06-label"
          className="[&_[data-slot=slider-thumb]]:size-4 [&_[data-slot=slider-track]]:h-1.5!"
          min={0}
          max={last}
          step={1}
          value={[index]}
          onValueChange={(value) =>
            setIndex(typeof value === "number" ? value : value[0])
          }
        />
        {/* Ticks sit at thumb centers: half a thumb (8px) in from each edge. */}
        <div aria-hidden="true" className="flex justify-between px-[7px]">
          {lengths.map((item, i) => (
            <span
              key={item.label}
              className={cn(
                "h-1.5 w-0.5 rounded-full transition-colors",
                i <= index ? "bg-primary" : "bg-border",
              )}
            />
          ))}
        </div>
        {/* Edge columns are half-width so each label centers under its tick. */}
        <div className="grid grid-cols-[minmax(max-content,1fr)_2fr_2fr_minmax(max-content,1fr)] text-xs">
          {lengths.map((item, i) => (
            <button
              key={item.label}
              type="button"
              aria-label={`Set response length to ${item.label}`}
              aria-pressed={i === index}
              onClick={() => setIndex(i)}
              className={cn(
                "whitespace-nowrap rounded-sm py-0.5 outline-none transition-colors hover:text-foreground focus-visible:ring-3 focus-visible:ring-ring/50",
                i === 0 && "text-left",
                i === last && "text-right",
                i > 0 && i < last && "text-center",
                i === index
                  ? "font-medium text-foreground"
                  : "text-muted-foreground",
              )}
            >
              {item.label}
            </button>
          ))}
        </div>
      </div>
    </div>
  );
}

TSX
"use client";

import { RotateCcwIcon } from "lucide-react";
import { useState } from "react";

import { Button } from "@/components/ui/button";
import { Slider } from "@/components/ui/slider";

const bands = [
  { id: "slider-07-60", label: "60 Hz", name: "Sub bass", defaultGain: 4 },
  { id: "slider-07-250", label: "250 Hz", name: "Bass", defaultGain: 2 },
  { id: "slider-07-1k", label: "1 kHz", name: "Mids", defaultGain: 0 },
  { id: "slider-07-4k", label: "4 kHz", name: "Presence", defaultGain: -2 },
  { id: "slider-07-12k", label: "12 kHz", name: "Air", defaultGain: 3 },
];

const flat = bands.map(() => 0);

function formatGain(gain: number) {
  return `${gain > 0 ? "+" : ""}${gain} dB`;
}

export default function Slider07() {
  const [gains, setGains] = useState(bands.map((band) => band.defaultGain));
  const isFlat = gains.every((gain) => gain === 0);

  return (
    <div className="flex w-full max-w-sm flex-col gap-4">
      <div className="flex items-center justify-between gap-4">
        <div className="flex flex-col gap-0.5">
          <span className="text-sm font-medium">Equalizer</span>
          <span className="text-xs text-muted-foreground">
            −12 to +12 dB per band
          </span>
        </div>
        <Button
          variant="outline"
          size="sm"
          disabled={isFlat}
          onClick={() => setGains(flat)}
        >
          <RotateCcwIcon aria-hidden="true" />
          Flat
        </Button>
      </div>
      <div className="grid grid-cols-5 gap-2">
        {bands.map((band, index) => (
          <div key={band.id} className="flex flex-col items-center gap-2">
            <span
              aria-hidden="true"
              className="text-xs font-medium tabular-nums"
            >
              {formatGain(gains[index])}
            </span>
            <div className="flex h-40 justify-center">
              <Slider
                aria-labelledby={band.id}
                orientation="vertical"
                className="[&_[data-slot=slider-thumb]]:size-4 [&_[data-slot=slider-track]]:w-1.5!"
                min={-12}
                max={12}
                step={1}
                value={[gains[index]]}
                onValueChange={(value) =>
                  setGains((current) =>
                    current.map((gain, i) =>
                      i === index
                        ? typeof value === "number"
                          ? value
                          : value[0]
                        : gain,
                    ),
                  )
                }
              />
            </div>
            <span id={band.id} className="flex flex-col items-center text-center">
              <span className="text-xs tabular-nums">{band.label}</span>
              <span className="sr-only">, {band.name}</span>
            </span>
          </div>
        ))}
      </div>
    </div>
  );
}

TSX
"use client";

import { CheckIcon } from "lucide-react";
import { useEffect, useRef, useState } from "react";

import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Slider } from "@/components/ui/slider";
import { Spinner } from "@/components/ui/spinner";

type SaveStatus = "idle" | "saving" | "saved";

const currency = new Intl.NumberFormat("en-US", {
  style: "currency",
  currency: "USD",
  maximumFractionDigits: 0,
});

export default function Slider08() {
  const [cap, setCap] = useState(750);
  const [savedCap, setSavedCap] = useState(750);
  const [status, setStatus] = useState<SaveStatus>("idle");
  const timers = useRef<ReturnType<typeof setTimeout>[]>([]);

  useEffect(() => {
    return () => {
      for (const timer of timers.current) clearTimeout(timer);
    };
  }, []);

  function save(next: number) {
    for (const timer of timers.current) clearTimeout(timer);
    if (next === savedCap) {
      setStatus("idle");
      return;
    }
    setStatus("saving");
    // Simulated request: settle after a short delay, then fade the badge out.
    timers.current = [
      setTimeout(() => {
        setSavedCap(next);
        setStatus("saved");
      }, 900),
      setTimeout(() => setStatus("idle"), 2900),
    ];
  }

  const dirty = cap !== savedCap;

  return (
    <Card className="w-full max-w-sm">
      <CardHeader>
        <CardTitle id="slider-08-label">Monthly spending cap</CardTitle>
        <CardDescription>
          Usage stops when this limit is reached. Changes save when you release
          the handle.
        </CardDescription>
      </CardHeader>
      <CardContent className="flex flex-col gap-4">
        <div className="flex items-end justify-between gap-4">
          <span
            aria-hidden="true"
            className="text-3xl font-semibold tracking-tight tabular-nums"
          >
            {currency.format(cap)}
          </span>
          <span
            role="status"
            className="flex h-6 items-center gap-1.5 text-xs text-muted-foreground"
          >
            {status === "saving" && (
              <>
                <Spinner aria-hidden="true" role="presentation" className="size-3.5" />
                Saving…
              </>
            )}
            {status === "saved" && (
              <>
                <CheckIcon aria-hidden="true" className="size-3.5 text-success" />
                Saved
              </>
            )}
            {status === "idle" && dirty && "Unsaved"}
          </span>
        </div>
        <Slider
          aria-labelledby="slider-08-label"
          className="transition-opacity data-[dragging]:[&_[data-slot=slider-thumb]]:scale-125 [&_[data-slot=slider-thumb]]:size-4 [&_[data-slot=slider-thumb]]:transition-[scale,box-shadow] [&_[data-slot=slider-thumb]]:duration-200 [&_[data-slot=slider-thumb]]:ease-out [&_[data-slot=slider-track]]:h-1.5!"
          min={100}
          max={2000}
          step={25}
          largeStep={250}
          value={[cap]}
          onValueChange={(value) =>
            setCap(typeof value === "number" ? value : value[0])
          }
          onValueCommitted={(value) =>
            save(typeof value === "number" ? value : value[0])
          }
        />
        <div
          aria-hidden="true"
          className="flex justify-between text-xs tabular-nums text-muted-foreground"
        >
          <span>{currency.format(100)}</span>
          <span>Last month: {currency.format(612)}</span>
          <span>{currency.format(2000)}</span>
        </div>
      </CardContent>
    </Card>
  );
}

TSX
"use client";

import { useMemo, useState } from "react";

import { Button } from "@/components/ui/button";
import { Slider } from "@/components/ui/slider";

const PRICE_MIN = 0;
const PRICE_MAX = 400;

const products = [
  { name: "Trail runner GTX", price: 149 },
  { name: "Merino base layer", price: 68 },
  { name: "Packable rain shell", price: 219 },
  { name: "Insulated vest", price: 129 },
  { name: "Hiking socks, 3-pack", price: 24 },
  { name: "Down parka", price: 349 },
  { name: "Softshell pants", price: 98 },
  { name: "Approach shoes", price: 165 },
  { name: "Fleece quarter-zip", price: 79 },
  { name: "Waterproof gaiters", price: 45 },
  { name: "Alpine hardshell", price: 389 },
  { name: "Trucker cap", price: 32 },
];

const presets = [
  { label: "Under $50", range: [0, 50] },
  { label: "$50 to $150", range: [50, 150] },
  { label: "$150+", range: [150, PRICE_MAX] },
] as const;

const currency = new Intl.NumberFormat("en-US", {
  style: "currency",
  currency: "USD",
  maximumFractionDigits: 0,
});

export default function Slider09() {
  const [range, setRange] = useState<[number, number]>([40, 240]);
  // The range the product grid currently shows; "Show" applies the draft.
  const [applied, setApplied] = useState<[number, number]>([
    PRICE_MIN,
    PRICE_MAX,
  ]);
  const [low, high] = range;

  const matches = useMemo(
    () =>
      products.filter(
        (product) => product.price >= low && product.price <= high,
      ).length,
    [low, high],
  );

  const isDefault = low === PRICE_MIN && high === PRICE_MAX;
  const isApplied = low === applied[0] && high === applied[1];

  return (
    <section
      aria-labelledby="slider-09-heading"
      className="flex w-full max-w-xs flex-col gap-4 rounded-xl border bg-card p-4 text-card-foreground"
    >
      <div className="flex items-start justify-between gap-2">
        <div className="flex flex-col gap-0.5">
          <h3 id="slider-09-heading" className="text-sm font-medium">
            Price
          </h3>
          <p
            aria-hidden="true"
            className="text-xs tabular-nums text-muted-foreground"
          >
            {currency.format(low)} –{" "}
            {high === PRICE_MAX
              ? `${currency.format(PRICE_MAX)}+`
              : currency.format(high)}
          </p>
        </div>
        <Button
          variant="ghost"
          size="xs"
          disabled={isDefault}
          onClick={() => setRange([PRICE_MIN, PRICE_MAX])}
        >
          Clear
        </Button>
      </div>

      <Slider
        aria-labelledby="slider-09-heading"
        value={range}
        min={PRICE_MIN}
        max={PRICE_MAX}
        step={5}
        minStepsBetweenValues={2}
        format={{
          style: "currency",
          currency: "USD",
          maximumFractionDigits: 0,
        }}
        onValueChange={(value) => {
          if (Array.isArray(value)) setRange([value[0], value[1]]);
        }}
      />

      <div className="flex flex-wrap gap-1.5">
        {presets.map((preset) => {
          const active = low === preset.range[0] && high === preset.range[1];
          return (
            <Button
              key={preset.label}
              variant={active ? "secondary" : "outline"}
              size="xs"
              aria-pressed={active}
              onClick={() => setRange([preset.range[0], preset.range[1]])}
            >
              {preset.label}
            </Button>
          );
        })}
      </div>

      <Button
        disabled={matches === 0 || isApplied}
        className="w-full"
        onClick={() => setApplied([low, high])}
      >
        {matches === 0
          ? "No products in this range"
          : `${isApplied ? "Showing" : "Show"} ${matches} ${matches === 1 ? "product" : "products"}`}
      </Button>
    </section>
  );
}

TSX
"use client";

import { PauseIcon, PlayIcon, RotateCcwIcon, RotateCwIcon } from "lucide-react";
import { useEffect, useState } from "react";

import { Button } from "@/components/ui/button";
import { Slider } from "@/components/ui/slider";

const EPISODE_LENGTH = 2538;

const chapters = [
  { start: 0, title: "Cold open" },
  { start: 142, title: "Why design tokens drift" },
  { start: 811, title: "Auditing a 400-screen app" },
  { start: 1504, title: "Shipping the migration" },
  { start: 2210, title: "Listener questions" },
];

function formatTime(totalSeconds: number) {
  const seconds = Math.max(0, Math.round(totalSeconds));
  const hours = Math.floor(seconds / 3600);
  const minutes = Math.floor((seconds % 3600) / 60);
  const rest = String(seconds % 60).padStart(2, "0");
  return hours > 0
    ? `${hours}:${String(minutes).padStart(2, "0")}:${rest}`
    : `${minutes}:${rest}`;
}

export default function Slider10() {
  const [position, setPosition] = useState(958);
  const [playing, setPlaying] = useState(false);

  useEffect(() => {
    if (!playing) return;
    const id = window.setInterval(() => {
      setPosition((current) => {
        if (current + 1 >= EPISODE_LENGTH) {
          setPlaying(false);
          return EPISODE_LENGTH;
        }
        return current + 1;
      });
    }, 1000);
    return () => window.clearInterval(id);
  }, [playing]);

  let chapterIndex = 0;
  chapters.forEach((item, index) => {
    if (item.start <= position) chapterIndex = index;
  });
  const chapter = chapters[chapterIndex];

  function seekBy(delta: number) {
    setPosition((current) =>
      Math.min(Math.max(current + delta, 0), EPISODE_LENGTH),
    );
  }

  return (
    <section
      aria-label="Podcast player"
      className="flex w-full max-w-sm flex-col gap-4 rounded-2xl border bg-card p-4 text-card-foreground"
    >
      <div className="flex items-center gap-3">
        <img
          src="/placeholder.svg"
          alt=""
          className="size-14 shrink-0 rounded-lg bg-muted object-cover"
        />
        <div className="flex min-w-0 flex-col gap-0.5">
          <p className="truncate text-sm font-medium">
            Ep. 84 — Rebuilding a design system in place
          </p>
          <p className="truncate text-xs text-muted-foreground">
            Chapter {chapterIndex + 1} of {chapters.length}: {chapter.title}
          </p>
        </div>
      </div>

      <div className="flex flex-col gap-2">
        <span id="slider-10-seek" className="sr-only">
          Playback position
        </span>
        <Slider
          aria-labelledby="slider-10-seek"
          value={[position]}
          min={0}
          max={EPISODE_LENGTH}
          largeStep={30}
          format={{ style: "unit", unit: "second", unitDisplay: "long" }}
          onValueChange={(value) =>
            setPosition(Array.isArray(value) ? (value[0] ?? 0) : value)
          }
        />
        <div aria-hidden="true" className="relative h-1.5">
          {chapters.slice(1).map((mark) => (
            <span
              key={mark.start}
              className="absolute top-0 h-1.5 w-px bg-border"
              style={{ left: `${(mark.start / EPISODE_LENGTH) * 100}%` }}
            />
          ))}
        </div>
        <div className="flex justify-between text-xs text-muted-foreground tabular-nums">
          <span>{formatTime(position)}</span>
          <span>-{formatTime(EPISODE_LENGTH - position)}</span>
        </div>
      </div>

      <div className="flex items-center justify-center gap-3">
        <Button
          variant="ghost"
          size="icon-lg"
          aria-label="Back 15 seconds"
          onClick={() => seekBy(-15)}
        >
          <RotateCcwIcon aria-hidden="true" />
        </Button>
        <Button
          size="icon-lg"
          className="size-11 rounded-full"
          aria-label={playing ? "Pause" : "Play"}
          onClick={() => {
            if (position >= EPISODE_LENGTH) setPosition(0);
            setPlaying((current) => !current);
          }}
        >
          {playing ? (
            <PauseIcon aria-hidden="true" className="size-5" />
          ) : (
            <PlayIcon aria-hidden="true" className="size-5" />
          )}
        </Button>
        <Button
          variant="ghost"
          size="icon-lg"
          aria-label="Forward 30 seconds"
          onClick={() => seekBy(30)}
        >
          <RotateCwIcon aria-hidden="true" />
        </Button>
      </div>
    </section>
  );
}

TSX
"use client";

import { CheckCircle2Icon } from "lucide-react";
import { useState } from "react";

import { Button } from "@/components/ui/button";
import { Label } from "@/components/ui/label";
import { Slider } from "@/components/ui/slider";
import { Textarea } from "@/components/ui/textarea";

const scale = Array.from({ length: 11 }, (_, index) => index);

const segments = {
  detractor: {
    label: "Not likely",
    tone: "text-destructive",
    prompt: "What was the biggest letdown with Relay this month?",
    placeholder: "The export to CSV kept timing out on large boards…",
  },
  passive: {
    label: "Somewhat likely",
    tone: "text-warning",
    prompt: "What is one thing that would make Relay a 10 for you?",
    placeholder: "Recurring tasks that skip weekends…",
  },
  promoter: {
    label: "Very likely",
    tone: "text-success",
    prompt: "What would you tell a teammate about Relay?",
    placeholder: "It replaced three tools for our support team…",
  },
} as const;

function segmentFor(score: number) {
  if (score <= 6) return segments.detractor;
  if (score <= 8) return segments.passive;
  return segments.promoter;
}

export default function Slider11() {
  const [score, setScore] = useState<number | null>(null);
  const [comment, setComment] = useState("");
  const [submitted, setSubmitted] = useState(false);
  const [dismissed, setDismissed] = useState(false);

  if (dismissed) {
    return (
      <div
        role="status"
        className="flex w-full max-w-sm flex-col items-center gap-2 rounded-xl border bg-card p-6 text-center text-card-foreground"
      >
        <p className="text-sm font-medium">No problem</p>
        <p className="text-sm text-muted-foreground">
          We will check in again next month.
        </p>
        <Button
          variant="ghost"
          size="sm"
          className="mt-1"
          onClick={() => setDismissed(false)}
        >
          Give feedback now
        </Button>
      </div>
    );
  }

  if (submitted) {
    return (
      <div
        role="status"
        className="flex w-full max-w-sm flex-col items-center gap-2 rounded-xl border bg-card p-6 text-center text-card-foreground"
      >
        <CheckCircle2Icon aria-hidden="true" className="size-6 text-success" />
        <p className="text-sm font-medium">Thanks, that helps a lot</p>
        <p className="text-sm text-muted-foreground">
          Your score of {score} goes straight to the product team. We read every
          comment.
        </p>
        <Button
          variant="ghost"
          size="sm"
          className="mt-1"
          onClick={() => {
            setSubmitted(false);
            setScore(null);
            setComment("");
          }}
        >
          Change my answer
        </Button>
      </div>
    );
  }

  const segment = score === null ? null : segmentFor(score);

  return (
    <form
      className="flex w-full max-w-sm flex-col gap-5 rounded-xl border bg-card p-5 text-card-foreground"
      onSubmit={(event) => {
        event.preventDefault();
        if (score !== null) setSubmitted(true);
      }}
    >
      <div className="flex flex-col gap-1">
        <h3 id="slider-11-question" className="text-sm font-medium">
          How likely are you to recommend Relay to a colleague?
        </h3>
        <p className="text-xs text-muted-foreground">
          0 is not at all likely, 10 is extremely likely.
        </p>
      </div>

      <div className="flex flex-col gap-2">
        <div className="flex items-baseline justify-between">
          <span className="text-3xl font-semibold tabular-nums">
            {score ?? "–"}
          </span>
          <span
            className={`text-sm font-medium ${segment ? segment.tone : "text-muted-foreground"}`}
          >
            {segment ? segment.label : "Drag to score"}
          </span>
        </div>
        <Slider
          aria-labelledby="slider-11-question"
          value={[score ?? 5]}
          min={0}
          max={10}
          step={1}
          className={score === null ? "opacity-60" : undefined}
          onValueChange={(value) =>
            setScore(Array.isArray(value) ? (value[0] ?? 0) : value)
          }
          // Pressing the thumb where it rests (5) fires no value change, so
          // record that resting value; a real change in the same press wins.
          onPointerDown={() => setScore((current) => current ?? 5)}
        />
        <div
          aria-hidden="true"
          className="flex justify-between text-[0.7rem] text-muted-foreground tabular-nums"
        >
          {scale.map((tick) => (
            <span
              key={tick}
              className={`w-3 text-center ${tick === score ? "font-semibold text-foreground" : ""}`}
            >
              {tick}
            </span>
          ))}
        </div>
      </div>

      {segment ? (
        <div className="flex flex-col gap-2">
          <Label htmlFor="slider-11-comment">{segment.prompt}</Label>
          <Textarea
            id="slider-11-comment"
            value={comment}
            placeholder={segment.placeholder}
            onChange={(event) => setComment(event.target.value)}
            rows={3}
          />
        </div>
      ) : null}

      <div className="flex items-center justify-end gap-2">
        <Button
          type="button"
          variant="ghost"
          onClick={() => {
            setDismissed(true);
            setScore(null);
            setComment("");
          }}
        >
          Not now
        </Button>
        <Button type="submit" disabled={score === null}>
          Send feedback
        </Button>
      </div>
    </form>
  );
}

TSX
"use client";

import {
  ContrastIcon,
  DropletIcon,
  RotateCcwIcon,
  SunIcon,
  ThermometerIcon,
} from "lucide-react";
import { useState } from "react";

import { Button } from "@/components/ui/button";
import { Slider } from "@/components/ui/slider";

type AdjustmentKey = "exposure" | "contrast" | "saturation" | "warmth";

const adjustments: {
  key: AdjustmentKey;
  label: string;
  icon: typeof SunIcon;
}[] = [
  { key: "exposure", label: "Exposure", icon: SunIcon },
  { key: "contrast", label: "Contrast", icon: ContrastIcon },
  { key: "saturation", label: "Saturation", icon: DropletIcon },
  { key: "warmth", label: "Warmth", icon: ThermometerIcon },
];

const neutral: Record<AdjustmentKey, number> = {
  exposure: 0,
  contrast: 0,
  saturation: 0,
  warmth: 0,
};

function toFilter(values: Record<AdjustmentKey, number>) {
  return [
    `brightness(${1 + values.exposure / 200})`,
    `contrast(${1 + values.contrast / 150})`,
    `saturate(${1 + values.saturation / 100})`,
    `sepia(${Math.max(values.warmth, 0) / 250})`,
    `hue-rotate(${Math.min(values.warmth, 0) / 5}deg)`,
  ].join(" ");
}

function formatSigned(value: number) {
  return value > 0 ? `+${value}` : String(value);
}

export default function Slider12() {
  const [values, setValues] = useState(neutral);
  const [showOriginal, setShowOriginal] = useState(false);

  const edited = adjustments.some(({ key }) => values[key] !== 0);

  return (
    <div className="flex w-full max-w-sm flex-col overflow-hidden rounded-xl border bg-card text-card-foreground">
      <div className="relative aspect-[4/3] bg-muted">
        <img
          src="/placeholder.svg"
          alt="Harbor at sunset, with current adjustments applied"
          className="size-full object-cover transition-[filter] duration-150"
          style={{ filter: showOriginal ? "none" : toFilter(values) }}
        />
        <Button
          variant="secondary"
          size="xs"
          className="absolute right-2 bottom-2 shadow-sm"
          disabled={!edited}
          aria-pressed={showOriginal}
          onPointerDown={() => setShowOriginal(true)}
          onPointerUp={() => setShowOriginal(false)}
          onPointerLeave={() => setShowOriginal(false)}
          onKeyDown={(event) => {
            if (event.key === " " || event.key === "Enter")
              setShowOriginal(true);
          }}
          onKeyUp={() => setShowOriginal(false)}
          onBlur={() => setShowOriginal(false)}
        >
          Hold to compare
        </Button>
      </div>

      <div className="flex flex-col gap-4 p-4">
        <div className="flex items-center justify-between">
          <h3 className="text-sm font-medium">Adjust</h3>
          <Button
            variant="ghost"
            size="xs"
            disabled={!edited}
            onClick={() => setValues(neutral)}
          >
            Reset all
          </Button>
        </div>

        {adjustments.map(({ key, label, icon: Icon }) => {
          const value = values[key];
          const labelId = `slider-12-${key}`;
          return (
            <div key={key} className="flex flex-col gap-2">
              <div className="flex items-center gap-2 text-sm">
                <Icon
                  aria-hidden="true"
                  className="size-4 text-muted-foreground"
                />
                <span id={labelId} className="font-medium">
                  {label}
                </span>
                <span
                  className={`ml-auto text-xs tabular-nums ${value === 0 ? "text-muted-foreground" : "text-foreground"}`}
                >
                  {formatSigned(value)}
                </span>
                <Button
                  variant="ghost"
                  size="icon-xs"
                  aria-label={`Reset ${label.toLowerCase()}`}
                  disabled={value === 0}
                  onClick={() =>
                    setValues((current) => ({ ...current, [key]: 0 }))
                  }
                >
                  <RotateCcwIcon aria-hidden="true" />
                </Button>
              </div>
              <div className="relative">
                <span
                  aria-hidden="true"
                  className="pointer-events-none absolute top-1/2 left-1/2 h-2.5 w-px -translate-y-1/2 bg-foreground/25"
                />
                <Slider
                  aria-labelledby={labelId}
                  value={[value]}
                  min={-100}
                  max={100}
                  step={1}
                  largeStep={10}
                  onValueChange={(next) =>
                    setValues((current) => ({
                      ...current,
                      [key]: Array.isArray(next) ? (next[0] ?? 0) : next,
                    }))
                  }
                />
              </div>
            </div>
          );
        })}
      </div>
    </div>
  );
}

TSX
"use client";

import { useState } from "react";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Label } from "@/components/ui/label";
import { Separator } from "@/components/ui/separator";
import { Slider } from "@/components/ui/slider";
import { Switch } from "@/components/ui/switch";

const INITIAL_SEATS = 12;
const MEMBERS = 11;
const MAX_SEATS = 100;
const ANNUAL_DISCOUNT = 0.2;

const tiers = [
  { from: 1, to: 10, price: 14, name: "Starter" },
  { from: 11, to: 50, price: 12, name: "Growth" },
  { from: 51, to: MAX_SEATS, price: 10, name: "Scale" },
];

const currency = new Intl.NumberFormat("en-US", {
  style: "currency",
  currency: "USD",
});

function tierFor(seats: number) {
  return (
    tiers.find((tier) => seats >= tier.from && seats <= tier.to) ?? tiers[0]
  );
}

export default function Slider13() {
  const [currentSeats, setCurrentSeats] = useState(INITIAL_SEATS);
  const [seats, setSeats] = useState(INITIAL_SEATS);
  const [annual, setAnnual] = useState(true);

  const tier = tierFor(seats);
  const perSeat = annual ? tier.price * (1 - ANNUAL_DISCOUNT) : tier.price;
  const monthly = perSeat * seats;
  const delta = seats - currentSeats;
  const belowMembers = seats < MEMBERS;

  return (
    <Card className="w-full max-w-sm">
      <CardHeader>
        <CardTitle id="slider-13-title">Team seats</CardTitle>
        <CardDescription>
          You use {MEMBERS} of {currentSeats} seats. Pricing drops as your team
          grows.
        </CardDescription>
      </CardHeader>

      <CardContent className="flex flex-col gap-5">
        <div className="flex flex-col gap-3">
          <div className="flex items-baseline justify-between gap-2">
            <p className="text-3xl font-semibold tabular-nums">
              {seats}
              <span className="ml-1 text-sm font-normal text-muted-foreground">
                {seats === 1 ? "seat" : "seats"}
              </span>
            </p>
            <Badge variant="secondary">{tier.name} tier</Badge>
          </div>
          <Slider
            aria-labelledby="slider-13-title"
            value={[seats]}
            min={1}
            max={MAX_SEATS}
            largeStep={10}
            onValueChange={(value) =>
              setSeats(Array.isArray(value) ? (value[0] ?? 1) : value)
            }
          />
          <ol className="grid grid-cols-[10fr_40fr_50fr] gap-1 text-[0.7rem]">
            {tiers.map((item) => {
              const active = item === tier;
              return (
                <li
                  key={item.name}
                  className={`flex flex-col gap-0.5 border-t-2 pt-1.5 ${active ? "border-primary text-foreground" : "border-border text-muted-foreground"}`}
                >
                  <span className="font-medium">${item.price}</span>
                  <span className="truncate">
                    {item.from}–{item.to}
                  </span>
                </li>
              );
            })}
          </ol>
        </div>

        <div className="flex items-center justify-between gap-4">
          <Label
            htmlFor="slider-13-annual"
            className="flex flex-col items-start gap-0.5"
          >
            <span>Annual billing</span>
            <span className="text-xs font-normal text-muted-foreground">
              Save 20% on every seat
            </span>
          </Label>
          <Switch
            id="slider-13-annual"
            checked={annual}
            onCheckedChange={setAnnual}
          />
        </div>

        <Separator />

        <dl className="flex flex-col gap-1.5 text-sm">
          <div className="flex justify-between">
            <dt className="text-muted-foreground">Per seat, monthly</dt>
            <dd className="tabular-nums">
              {currency.format(perSeat)}
              {annual ? (
                <span className="ml-1.5 text-muted-foreground line-through">
                  {currency.format(tier.price)}
                </span>
              ) : null}
            </dd>
          </div>
          <div className="flex justify-between">
            <dt className="text-muted-foreground">
              {annual ? "Billed yearly" : "Billed monthly"}
            </dt>
            <dd className="tabular-nums">
              {currency.format(annual ? monthly * 12 : monthly)}
            </dd>
          </div>
          <div className="flex justify-between font-medium">
            <dt>Monthly equivalent</dt>
            <dd className="tabular-nums" aria-live="polite">
              {currency.format(monthly)}
            </dd>
          </div>
        </dl>
      </CardContent>

      <CardFooter className="flex flex-col items-stretch gap-2">
        <Button
          disabled={delta === 0 || belowMembers}
          onClick={() => setCurrentSeats(seats)}
        >
          {delta === 0
            ? "No changes"
            : delta > 0
              ? `Add ${delta} ${delta === 1 ? "seat" : "seats"}`
              : `Remove ${-delta} ${delta === -1 ? "seat" : "seats"}`}
        </Button>
        <p
          className={`text-center text-xs ${belowMembers ? "text-destructive" : "text-muted-foreground"}`}
        >
          {belowMembers
            ? `Remove ${MEMBERS - seats} ${MEMBERS - seats === 1 ? "member" : "members"} before dropping below ${MEMBERS} seats.`
            : "Changes are prorated to your next invoice on Oct 1."}
        </p>
      </CardFooter>
    </Card>
  );
}