Marker

TSX
"use client";

import {
  PencilLineIcon,
  PinIcon,
  UserMinusIcon,
  UserPlusIcon,
} from "lucide-react";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const events = [
  {
    id: "joined",
    icon: UserPlusIcon,
    actor: "Maya Chen",
    action: "joined #design\u2011reviews",
    time: "9:12 AM",
    dateTime: "09:12",
  },
  {
    id: "renamed",
    icon: PencilLineIcon,
    actor: "Jordan Park",
    action: "renamed the channel from #ui\u2011crit",
    time: "9:20 AM",
    dateTime: "09:20",
  },
  {
    id: "pinned",
    icon: PinIcon,
    actor: "Maya Chen",
    action: "pinned “Q4 navigation audit”",
    time: "10:04 AM",
    dateTime: "10:04",
  },
  {
    id: "left",
    icon: UserMinusIcon,
    actor: "Sam Ortiz",
    action: "left the channel",
    time: "11:37 AM",
    dateTime: "11:37",
  },
];

export default function Marker01() {
  return (
    <ul
      aria-label="Channel activity"
      className="flex w-full max-w-sm flex-col gap-3"
    >
      {events.map((event) => (
        <li key={event.id}>
          <Marker>
            <MarkerIcon>
              <event.icon />
            </MarkerIcon>
            <MarkerContent className="flex-1">
              <span className="font-medium text-foreground">
                {event.actor}
              </span>{" "}
              {event.action}
            </MarkerContent>
            <time
              dateTime={event.dateTime}
              className="shrink-0 text-xs tabular-nums"
            >
              {event.time}
            </time>
          </Marker>
        </li>
      ))}
    </ul>
  );
}

TSX
"use client";

import { CalendarDaysIcon } from "lucide-react";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const days = [
  {
    label: "Monday, September 22",
    dateTime: "2026-09-22",
    messages: [
      { author: "Priya", text: "Kickoff notes are in the shared folder." },
      { author: "Leo", text: "Thanks — I'll draft the API contract tonight." },
    ],
  },
  {
    label: "Yesterday",
    dateTime: "2026-09-24",
    messages: [
      { author: "Leo", text: "Contract draft is up for review." },
    ],
  },
  {
    label: "Today",
    dateTime: "2026-09-25",
    messages: [
      { author: "Priya", text: "Approved with two small comments." },
      { author: "Leo", text: "Addressed both, merging after lunch." },
    ],
  },
];

export default function Marker02() {
  return (
    <div className="flex w-full max-w-sm flex-col gap-4">
      {days.map((day, index) => (
        <section
          key={day.dateTime}
          aria-label={day.label}
          className="flex flex-col gap-3"
        >
          <Marker variant="separator" className="text-xs font-medium">
            {index === 0 ? (
              <MarkerIcon className="size-3.5">
                <CalendarDaysIcon className="size-3.5" />
              </MarkerIcon>
            ) : null}
            <MarkerContent>
              <time dateTime={day.dateTime}>{day.label}</time>
            </MarkerContent>
          </Marker>
          <ul className="flex flex-col gap-2">
            {day.messages.map((message) => (
              <li
                key={message.text}
                className="text-sm leading-relaxed text-foreground"
              >
                <span className="font-medium">{message.author}</span>{" "}
                <span className="text-muted-foreground">{message.text}</span>
              </li>
            ))}
          </ul>
        </section>
      ))}
    </div>
  );
}

TSX
"use client";

import * as React from "react";
import { CircleDotIcon } from "lucide-react";

import { Button } from "@/components/ui/button";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const earlier = [
  { author: "Nadia", text: "Staging deploy is green." },
  { author: "Owen", text: "I'll start the smoke tests." },
];

const unread = [
  { author: "Owen", text: "Checkout flow fails on Safari 17." },
  { author: "Nadia", text: "Reproduced it — the payment iframe is blocked." },
  { author: "Owen", text: "Rolling back the CSP change now." },
];

export default function Marker03() {
  const [hasUnread, setHasUnread] = React.useState(true);

  return (
    <div className="flex w-full max-w-sm flex-col gap-3">
      <ul className="flex flex-col gap-2">
        {earlier.map((message) => (
          <li key={message.text} className="text-sm text-muted-foreground">
            <span className="font-medium text-foreground">
              {message.author}
            </span>{" "}
            {message.text}
          </li>
        ))}
      </ul>
      {hasUnread ? (
        <Marker
          variant="border"
          role="status"
          className="border-primary/40 text-primary"
        >
          <MarkerIcon>
            <CircleDotIcon />
          </MarkerIcon>
          <MarkerContent className="flex-1 font-medium">
            {unread.length} new since 2:14 PM
          </MarkerContent>
          <Button
            variant="ghost"
            size="xs"
            className="-my-1 text-primary hover:text-primary"
            onClick={() => setHasUnread(false)}
          >
            Mark as read
          </Button>
        </Marker>
      ) : null}
      <ul className="flex flex-col gap-2">
        {unread.map((message) => (
          <li
            key={message.text}
            className="text-sm text-muted-foreground"
          >
            <span className="font-medium text-foreground">
              {message.author}
            </span>{" "}
            {message.text}
          </li>
        ))}
      </ul>
    </div>
  );
}

TSX
"use client";

import {
  CircleAlertIcon,
  CircleCheckIcon,
  CircleXIcon,
  InfoIcon,
} from "lucide-react";
import { cn } from "cn";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const tones = {
  info: { icon: InfoIcon, className: "text-muted-foreground", label: "Info" },
  success: { icon: CircleCheckIcon, className: "text-success", label: "Passed" },
  warning: {
    icon: CircleAlertIcon,
    className: "text-warning",
    label: "Warning",
  },
  error: { icon: CircleXIcon, className: "text-destructive", label: "Failed" },
} as const;

const steps: { id: string; tone: keyof typeof tones; text: string }[] = [
  { id: "queued", tone: "info", text: "Build 1842 queued on runner eu\u2011west\u20112" },
  { id: "tests", tone: "success", text: "412 unit tests passed in 38s" },
  {
    id: "bundle",
    tone: "warning",
    text: "Bundle grew 18 KB — above the 10 KB budget",
  },
  {
    id: "e2e",
    tone: "error",
    text: "E2E: checkout.spec.ts timed out after 30s",
  },
];

export default function Marker04() {
  return (
    <ol
      aria-label="Build 1842 log"
      className="flex w-full max-w-sm flex-col gap-3"
    >
      {steps.map((step) => {
        const tone = tones[step.tone];
        return (
          <li key={step.id}>
            <Marker
              data-tone={step.tone}
              className="items-start data-[tone=error]:text-foreground"
            >
              <MarkerIcon className={cn("mt-0.5", tone.className)}>
                <tone.icon />
              </MarkerIcon>
              <MarkerContent>
                <span className="sr-only">{tone.label}: </span>
                {step.text}
              </MarkerContent>
            </Marker>
          </li>
        );
      })}
    </ol>
  );
}

TSX
"use client";

import * as React from "react";
import { flushSync } from "react-dom";
import { ArrowDownIcon, ChevronRightIcon, MessagesSquareIcon } from "lucide-react";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const hiddenReplies = [
  { author: "Theo", text: "Can we keep the old export as a fallback?" },
  { author: "Iris", text: "Yes, behind a flag until the next release." },
  { author: "Theo", text: "Works for me. I'll update the changelog." },
];

const interactive =
  "w-full cursor-pointer rounded-md px-2 py-1.5 no-underline outline-none transition-colors hover:bg-muted hover:text-foreground focus-visible:ring-3 focus-visible:ring-ring/50";

export default function Marker05() {
  const [expanded, setExpanded] = React.useState(false);
  const listId = React.useId();
  const latestId = `${listId}-latest`;
  const latestRef = React.useRef<HTMLLIElement>(null);

  function jumpToLatest(event: React.MouseEvent) {
    event.preventDefault();
    // The latest reply lives in the collapsed list, so reveal it first.
    flushSync(() => setExpanded(true));
    latestRef.current?.scrollIntoView({ block: "nearest", behavior: "smooth" });
    latestRef.current?.focus({ preventScroll: true });
  }

  return (
    <div className="flex w-full max-w-sm flex-col gap-2">
      <p className="px-2 text-sm">
        <span className="font-medium">Iris</span>{" "}
        <span className="text-muted-foreground">
          Shipping the CSV export redesign on Thursday.
        </span>
      </p>
      <Marker
        render={<button type="button" />}
        aria-expanded={expanded}
        aria-controls={listId}
        className={interactive}
        onClick={() => setExpanded((value) => !value)}
      >
        <MarkerIcon>
          <ChevronRightIcon
            className={
              expanded
                ? "rotate-90 transition-transform"
                : "transition-transform"
            }
          />
        </MarkerIcon>
        <MarkerContent>
          {expanded
            ? "Hide replies"
            : `Show ${hiddenReplies.length} earlier replies`}
        </MarkerContent>
      </Marker>
      <ul id={listId} hidden={!expanded} className="flex flex-col gap-2 pr-2 pl-8">
        {hiddenReplies.map((reply, index) => {
          const latest = index === hiddenReplies.length - 1;
          return (
          <li
            key={reply.text}
            id={latest ? latestId : undefined}
            ref={latest ? latestRef : undefined}
            tabIndex={latest ? -1 : undefined}
            className="-mx-2 rounded-md px-2 text-sm outline-none transition-colors focus:bg-muted"
          >
            <span className="font-medium">{reply.author}</span>{" "}
            <span className="text-muted-foreground">{reply.text}</span>
          </li>
          );
        })}
      </ul>
      <Marker render={<a href={`#${latestId}`} />}
        className={interactive}
        onClick={jumpToLatest}
      >
        <MarkerIcon>
          <MessagesSquareIcon />
        </MarkerIcon>
        <MarkerContent className="flex-1">
          Jump to latest reply from Theo
        </MarkerContent>
        <ArrowDownIcon aria-hidden="true" className="shrink-0" />
      </Marker>
    </div>
  );
}

TSX
"use client";

import * as React from "react";
import {
  FileCodeIcon,
  FoldVerticalIcon,
  UnfoldVerticalIcon,
} from "lucide-react";
import { cn } from "cn";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

type Line = {
  id: string;
  number?: number;
  kind: "context" | "add" | "remove";
  code: string;
};

type Segment =
  | { kind: "hidden"; id: string; lines: Line[] }
  | { kind: "hunk"; id: string; lines: Line[] };

const segments: Segment[] = [
  {
    kind: "hidden",
    id: "top",
    lines: [
      {
        id: "1",
        number: 1,
        kind: "context",
        code: "type Plan = { price: number; cycleStart: Date };",
      },
      { id: "2", number: 2, kind: "context", code: "" },
      {
        id: "3",
        number: 3,
        kind: "context",
        code: "const differenceInDays = (a: Date, b: Date) =>",
      },
      {
        id: "4",
        number: 4,
        kind: "context",
        code: "  Math.round((a.getTime() - b.getTime()) / 86_400_000);",
      },
    ],
  },
  {
    kind: "hunk",
    id: "prorate",
    lines: [
      {
        id: "5",
        number: 5,
        kind: "context",
        code: "export function prorate(plan: Plan, changedAt: Date) {",
      },
      { id: "6-old", kind: "remove", code: "  const days = 30;" },
      {
        id: "6",
        number: 6,
        kind: "add",
        code: "  const days = daysInCycle(plan.cycleStart);",
      },
      {
        id: "7",
        number: 7,
        kind: "context",
        code: "  const used = differenceInDays(changedAt, plan.cycleStart);",
      },
      {
        id: "8",
        number: 8,
        kind: "add",
        code: "  const remaining = Math.max(days - used, 0);",
      },
      {
        id: "9-old",
        kind: "remove",
        code: "  return (plan.price / days) * (days - used);",
      },
      {
        id: "9",
        number: 9,
        kind: "add",
        code: "  return roundCents((plan.price / days) * remaining);",
      },
      { id: "10", number: 10, kind: "context", code: "}" },
    ],
  },
  {
    kind: "hidden",
    id: "middle",
    lines: [
      { id: "11", number: 11, kind: "context", code: "" },
      {
        id: "12",
        number: 12,
        kind: "context",
        code: "function roundCents(value: number) {",
      },
      {
        id: "13",
        number: 13,
        kind: "context",
        code: "  return Math.round(value * 100) / 100;",
      },
      { id: "14", number: 14, kind: "context", code: "}" },
    ],
  },
  {
    kind: "hunk",
    id: "days-in-cycle",
    lines: [
      { id: "15", number: 15, kind: "context", code: "" },
      {
        id: "16",
        number: 16,
        kind: "add",
        code: "function daysInCycle(start: Date) {",
      },
      {
        id: "17",
        number: 17,
        kind: "add",
        code: "  const end = new Date(start.getFullYear(), start.getMonth() + 1, start.getDate());",
      },
      {
        id: "18",
        number: 18,
        kind: "add",
        code: "  return differenceInDays(end, start);",
      },
      { id: "19", number: 19, kind: "add", code: "}" },
    ],
  },
];

const signs = {
  context: { symbol: " ", label: "" },
  add: { symbol: "+", label: "Added: " },
  remove: { symbol: "-", label: "Removed: " },
} as const;

function DiffLine({ line }: { line: Line }) {
  const sign = signs[line.kind];
  return (
    <div
      className={cn(
        "flex px-3",
        line.kind === "add" && "bg-success/10",
        line.kind === "remove" && "bg-destructive/10",
      )}
    >
      <span
        aria-hidden="true"
        className="w-7 shrink-0 pr-2 text-right text-muted-foreground tabular-nums select-none"
      >
        {line.number}
      </span>
      <span
        aria-hidden="true"
        className={cn(
          "w-4 shrink-0 select-none",
          line.kind === "add" && "text-success",
          line.kind === "remove" && "text-destructive",
        )}
      >
        {sign.symbol}
      </span>
      <code className="pr-3 whitespace-pre">
        {sign.label ? <span className="sr-only">{sign.label}</span> : null}
        {line.code || " "}
      </code>
    </div>
  );
}

export default function Marker06() {
  const [expanded, setExpanded] = React.useState<string[]>([]);
  const baseId = React.useId();

  function toggle(id: string) {
    setExpanded((current) =>
      current.includes(id)
        ? current.filter((item) => item !== id)
        : [...current, id],
    );
  }

  return (
    <section
      aria-labelledby={`${baseId}-file`}
      className="w-full max-w-md overflow-hidden rounded-xl border border-border bg-card text-card-foreground"
    >
      <header className="flex items-center gap-2 border-b border-border px-3 py-2.5">
        <FileCodeIcon
          aria-hidden="true"
          className="size-4 shrink-0 text-muted-foreground"
        />
        <h3 id={`${baseId}-file`} className="min-w-0 truncate font-mono text-xs">
          src/billing/proration.ts
        </h3>
        <span className="ml-auto flex shrink-0 gap-2 font-mono text-xs tabular-nums">
          <span className="text-success">
            +7<span className="sr-only"> additions</span>
          </span>
          <span className="text-destructive">
            -2<span className="sr-only"> deletions</span>
          </span>
        </span>
      </header>
      <div className="@container overflow-x-auto py-1.5">
        <div className="w-max min-w-full font-mono text-xs leading-5">
          {segments.map((segment) => {
            if (segment.kind === "hunk") {
              return segment.lines.map((line) => (
                <DiffLine key={line.id} line={line} />
              ));
            }
            const isOpen = expanded.includes(segment.id);
            const panelId = `${baseId}-${segment.id}`;
            const count = segment.lines.length;
            return (
              <React.Fragment key={segment.id}>
                <Marker
                  variant="separator"
                  render={<button type="button" />}
                  aria-expanded={isOpen}
                  aria-controls={panelId}
                  onClick={() => toggle(segment.id)}
                  className="sticky left-0 my-1 w-[100cqw] cursor-pointer bg-muted/50 px-3 py-1 font-sans text-xs transition-colors outline-none hover:bg-muted hover:text-foreground focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-inset"
                >
                  <MarkerIcon className="size-3.5">
                    {isOpen ? (
                      <FoldVerticalIcon className="size-3.5" />
                    ) : (
                      <UnfoldVerticalIcon className="size-3.5" />
                    )}
                  </MarkerIcon>
                  <MarkerContent>
                    {isOpen ? "Hide" : "Expand"} {count} unchanged lines
                  </MarkerContent>
                </Marker>
                <div id={panelId} hidden={!isOpen}>
                  {segment.lines.map((line) => (
                    <DiffLine key={line.id} line={line} />
                  ))}
                </div>
              </React.Fragment>
            );
          })}
        </div>
      </div>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import {
  BellIcon,
  CheckIcon,
  GitPullRequestIcon,
  MessageSquareIcon,
} from "lucide-react";

import { Button } from "@/components/ui/button";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

type Notice = {
  id: string;
  icon: React.ComponentType;
  title: string;
  detail: string;
  time: string;
  day: "Today" | "Yesterday";
};

const notices: Notice[] = [
  {
    id: "n1",
    icon: MessageSquareIcon,
    title: "Lena commented on Q4 roadmap",
    detail: "“Can we move the SSO work before the pricing launch?”",
    time: "11:42",
    day: "Today",
  },
  {
    id: "n2",
    icon: GitPullRequestIcon,
    title: "Review requested on PR 1289",
    detail: "Add rate limiting to the export endpoint",
    time: "10:05",
    day: "Today",
  },
  {
    id: "n3",
    icon: BellIcon,
    title: "Invoice INV-2093 was paid",
    detail: "Northwind Traders · $2,400.00",
    time: "17:30",
    day: "Yesterday",
  },
  {
    id: "n4",
    icon: MessageSquareIcon,
    title: "Theo mentioned you in Design sync",
    detail: "“@you the empty state copy is ready for review.”",
    time: "14:12",
    day: "Yesterday",
  },
];

export default function Marker07() {
  // The first `unreadCount` notices are unread; the rest were already seen.
  const [unreadCount, setUnreadCount] = React.useState(3);
  const days = ["Today", "Yesterday"] as const;

  return (
    <section
      aria-labelledby="marker-07-title"
      className="flex w-full max-w-sm flex-col rounded-xl border border-border bg-card text-card-foreground"
    >
      <header className="flex items-center justify-between gap-3 px-4 pt-4 pb-2">
        <h3 id="marker-07-title" className="text-sm font-medium">
          Notifications
        </h3>
        <Button
          variant="ghost"
          size="xs"
          disabled={unreadCount === 0}
          onClick={() => setUnreadCount(0)}
        >
          <CheckIcon data-icon="inline-start" aria-hidden="true" />
          Mark all read
        </Button>
      </header>

      <div className="flex flex-col gap-1 px-4 pb-4">
        {days.map((day) => (
          <div key={day} className="flex flex-col">
            <Marker variant="separator" className="py-2 text-xs">
              <MarkerContent>{day}</MarkerContent>
            </Marker>
            <ul className="flex flex-col">
              {notices
                .filter((notice) => notice.day === day)
                .map((notice) => {
                  const index = notices.indexOf(notice);
                  const unread = index < unreadCount;
                  const Icon = notice.icon;
                  return (
                    <li key={notice.id} className="flex flex-col">
                      <div className="flex gap-3 py-2.5">
                        <span
                          aria-hidden="true"
                          className="mt-0.5 flex size-7 shrink-0 items-center justify-center rounded-full bg-muted text-muted-foreground [&_svg]:size-3.5"
                        >
                          <Icon />
                        </span>
                        <div className="flex min-w-0 flex-1 flex-col gap-0.5">
                          <p
                            className={
                              unread
                                ? "text-sm font-medium"
                                : "text-sm text-muted-foreground"
                            }
                          >
                            {notice.title}
                            {unread && (
                              <span className="sr-only"> (unread)</span>
                            )}
                          </p>
                          <p className="truncate text-xs text-muted-foreground">
                            {notice.detail}
                          </p>
                        </div>
                        <span className="shrink-0 text-xs text-muted-foreground tabular-nums">
                          {notice.time}
                        </span>
                      </div>
                      {unreadCount > 0 && index === unreadCount - 1 && (
                        <Marker variant="border" className="text-xs">
                          <MarkerIcon>
                            <CheckIcon />
                          </MarkerIcon>
                          <MarkerContent>Already read below this line</MarkerContent>
                        </Marker>
                      )}
                    </li>
                  );
                })}
            </ul>
          </div>
        ))}
        {unreadCount === 0 && (
          <Marker role="status" className="pt-2 text-xs">
            <MarkerIcon>
              <CheckIcon />
            </MarkerIcon>
            <MarkerContent>All notifications marked as read</MarkerContent>
          </Marker>
        )}
      </div>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import {
  CircleAlertIcon,
  CircleCheckIcon,
  CloudUploadIcon,
} from "lucide-react";

import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";
import { Textarea } from "@/components/ui/textarea";

type SaveState = "saved" | "saving" | "invalid";

const statusCopy: Record<SaveState, string> = {
  saved: "All changes saved",
  saving: "Saving changes…",
  invalid: "Not saved — workspace name is required",
};

export default function Marker08() {
  const [name, setName] = React.useState("Acme Logistics");
  const [about, setAbout] = React.useState(
    "Freight routing and warehouse tooling for mid-size carriers.",
  );
  const [state, setState] = React.useState<SaveState>("saved");
  const timer = React.useRef<ReturnType<typeof setTimeout> | null>(null);

  React.useEffect(() => {
    return () => {
      if (timer.current) clearTimeout(timer.current);
    };
  }, []);

  function queueSave(nextName: string) {
    if (timer.current) clearTimeout(timer.current);
    if (nextName.trim() === "") {
      setState("invalid");
      return;
    }
    setState("saving");
    // Simulate a debounced autosave round-trip.
    timer.current = setTimeout(() => setState("saved"), 900);
  }

  const Icon =
    state === "saved"
      ? CircleCheckIcon
      : state === "saving"
        ? CloudUploadIcon
        : CircleAlertIcon;

  return (
    <form
      aria-labelledby="marker-08-title"
      onSubmit={(event) => event.preventDefault()}
      className="flex w-full max-w-md flex-col gap-5 rounded-xl border border-border bg-card p-5 text-card-foreground"
    >
      <div className="flex flex-col gap-1">
        <h3 id="marker-08-title" className="text-sm font-medium">
          Workspace profile
        </h3>
        <p className="text-sm text-muted-foreground">
          Changes save automatically as you type.
        </p>
      </div>

      <div className="flex flex-col gap-2">
        <Label htmlFor="marker-08-name">Workspace name</Label>
        <Input
          id="marker-08-name"
          value={name}
          aria-invalid={state === "invalid" || undefined}
          aria-describedby="marker-08-status"
          onChange={(event) => {
            setName(event.target.value);
            queueSave(event.target.value);
          }}
        />
      </div>

      <div className="flex flex-col gap-2">
        <Label htmlFor="marker-08-about">Description</Label>
        <Textarea
          id="marker-08-about"
          rows={3}
          value={about}
          onChange={(event) => {
            setAbout(event.target.value);
            queueSave(name);
          }}
        />
      </div>

      <Marker
        id="marker-08-status"
        role="status"
        data-state={state}
        className="border-t border-border pt-4 text-xs data-[state=invalid]:text-destructive data-[state=saving]:text-foreground"
      >
        <MarkerIcon
          className={state === "saving" ? "motion-safe:animate-pulse" : undefined}
        >
          <Icon />
        </MarkerIcon>
        <MarkerContent>{statusCopy[state]}</MarkerContent>
      </Marker>
    </form>
  );
}

TSX
"use client";

import {
  CircleCheckIcon,
  MapPinIcon,
  PackageCheckIcon,
  TruckIcon,
  WarehouseIcon,
} from "lucide-react";

import { Badge } from "@/components/ui/badge";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const days = [
  {
    label: "Thursday, Sep 25",
    events: [
      {
        id: "e5",
        icon: TruckIcon,
        time: "07:48",
        text: "Out for delivery from Portland, OR",
        current: true,
      },
      {
        id: "e4",
        icon: WarehouseIcon,
        time: "03:12",
        text: "Arrived at Portland distribution center",
      },
    ],
  },
  {
    label: "Wednesday, Sep 24",
    events: [
      {
        id: "e3",
        icon: MapPinIcon,
        time: "18:30",
        text: "Departed Sacramento, CA",
      },
      {
        id: "e2",
        icon: PackageCheckIcon,
        time: "11:05",
        text: "Picked up by carrier",
      },
      {
        id: "e1",
        icon: CircleCheckIcon,
        time: "09:40",
        text: "Order packed and labeled",
      },
    ],
  },
];

export default function Marker09() {
  return (
    <section
      aria-labelledby="marker-09-title"
      className="flex w-full max-w-sm flex-col gap-4 rounded-xl border border-border bg-card p-4 text-card-foreground"
    >
      <div className="flex items-start gap-3">
        <img
          src="/placeholder.svg"
          alt=""
          className="size-14 shrink-0 rounded-lg border border-border bg-muted object-cover"
        />
        <div className="flex min-w-0 flex-1 flex-col gap-1">
          <div className="flex flex-wrap items-center justify-between gap-x-2 gap-y-1">
            <h3 id="marker-09-title" className="text-sm font-medium">
              Order #SV-30418
            </h3>
            <Badge variant="secondary">In transit</Badge>
          </div>
          <p className="text-xs text-muted-foreground">
            Merino crew sweater · Charcoal · M
          </p>
          <p className="text-xs">
            Arrives <span className="font-medium">today by 8 PM</span>
          </p>
        </div>
      </div>

      <ol aria-label="Shipment history" className="flex flex-col gap-3">
        {days.map((day) => (
          <li key={day.label} className="flex flex-col gap-2.5">
            <Marker variant="separator" className="text-xs">
              <MarkerContent>{day.label}</MarkerContent>
            </Marker>
            <ol className="flex flex-col gap-2.5">
              {day.events.map((event) => {
                const Icon = event.icon;
                return (
                  <li key={event.id}>
                    <Marker
                      aria-current={event.current ? "step" : undefined}
                      className="items-start aria-[current=step]:text-foreground"
                    >
                      <MarkerIcon className="mt-0.5">
                        <Icon />
                      </MarkerIcon>
                      <MarkerContent className="flex-1">
                        {event.text}
                        {event.current && (
                          <span className="sr-only"> (latest update)</span>
                        )}
                      </MarkerContent>
                      <time className="shrink-0 text-xs text-muted-foreground tabular-nums">
                        {event.time}
                      </time>
                    </Marker>
                  </li>
                );
              })}
            </ol>
          </li>
        ))}
      </ol>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import {
  ArrowUpCircleIcon,
  CheckIcon,
  DownloadIcon,
  TicketPercentIcon,
} from "lucide-react";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

type Row =
  | { kind: "year"; id: string; label: string }
  | {
      kind: "invoice";
      id: string;
      date: string;
      amount: string;
      plan: string;
      status: "Paid" | "Refunded";
    }
  | { kind: "note"; id: string; icon: "upgrade" | "coupon"; text: string };

const rows: Row[] = [
  { kind: "year", id: "y2026", label: "2026" },
  {
    kind: "invoice",
    id: "INV-0931",
    date: "Sep 1",
    amount: "$96.00",
    plan: "Team · 8 seats",
    status: "Paid",
  },
  {
    kind: "note",
    id: "n-upgrade",
    icon: "upgrade",
    text: "Upgraded from Starter to Team on Aug 14 · $31.20 prorated",
  },
  {
    kind: "invoice",
    id: "INV-0874",
    date: "Aug 1",
    amount: "$29.00",
    plan: "Starter",
    status: "Paid",
  },
  {
    kind: "invoice",
    id: "INV-0812",
    date: "Jul 1",
    amount: "$29.00",
    plan: "Starter",
    status: "Refunded",
  },
  { kind: "year", id: "y2025", label: "2025" },
  {
    kind: "note",
    id: "n-coupon",
    icon: "coupon",
    text: "LAUNCH25 applied — 25% off for 3 months",
  },
  {
    kind: "invoice",
    id: "INV-0655",
    date: "Dec 1",
    amount: "$21.75",
    plan: "Starter",
    status: "Paid",
  },
];

export default function Marker10() {
  const [downloaded, setDownloaded] = React.useState<string | null>(null);
  const timer = React.useRef<ReturnType<typeof setTimeout> | null>(null);

  React.useEffect(() => {
    return () => {
      if (timer.current) clearTimeout(timer.current);
    };
  }, []);

  function download(id: string) {
    if (timer.current) clearTimeout(timer.current);
    setDownloaded(id);
    // Simulate the file download finishing, then restore the icon.
    timer.current = setTimeout(() => setDownloaded(null), 2000);
  }

  return (
    <section
      aria-labelledby="marker-10-title"
      className="flex w-full max-w-md flex-col gap-3 rounded-xl border border-border bg-card p-4 text-card-foreground"
    >
      <div className="flex flex-col gap-0.5">
        <h3 id="marker-10-title" className="text-sm font-medium">
          Billing history
        </h3>
        <p className="text-sm text-muted-foreground">
          Invoices and plan changes for Brightline Studio.
        </p>
      </div>

      <ul className="flex flex-col">
        {rows.map((row) => {
          if (row.kind === "year") {
            return (
              <li key={row.id} className="py-2">
                <Marker variant="separator" className="text-xs">
                  <MarkerContent>{row.label}</MarkerContent>
                </Marker>
              </li>
            );
          }
          if (row.kind === "note") {
            return (
              <li key={row.id} className="py-1.5 pl-1">
                <Marker className="text-xs">
                  <MarkerIcon>
                    {row.icon === "upgrade" ? (
                      <ArrowUpCircleIcon />
                    ) : (
                      <TicketPercentIcon />
                    )}
                  </MarkerIcon>
                  <MarkerContent>{row.text}</MarkerContent>
                </Marker>
              </li>
            );
          }
          return (
            <li
              key={row.id}
              className="flex items-center gap-2 border-b border-border py-2.5 last:border-b-0 sm:gap-3"
            >
              <div className="flex min-w-0 flex-1 flex-col">
                <span className="text-sm font-medium">
                  {row.date} <span className="sr-only">invoice</span>
                </span>
                <span className="text-xs text-muted-foreground">
                  <span className="whitespace-nowrap">{row.id}&nbsp;·</span>{" "}
                  {row.plan}
                </span>
              </div>
              <Badge variant={row.status === "Paid" ? "outline" : "secondary"}>
                {row.status}
              </Badge>
              <span
                className={
                  row.status === "Refunded"
                    ? "w-16 text-right text-sm text-muted-foreground tabular-nums line-through"
                    : "w-16 text-right text-sm tabular-nums"
                }
              >
                {row.amount}
              </span>
              <Button
                variant="ghost"
                size="icon-sm"
                aria-label={
                  downloaded === row.id
                    ? `Invoice ${row.id} downloaded`
                    : `Download invoice ${row.id}`
                }
                onClick={() => download(row.id)}
              >
                {downloaded === row.id ? (
                  <CheckIcon aria-hidden="true" className="text-success" />
                ) : (
                  <DownloadIcon aria-hidden="true" />
                )}
              </Button>
            </li>
          );
        })}
      </ul>
      <p role="status" className="sr-only">
        {downloaded ? `Invoice ${downloaded} downloaded` : ""}
      </p>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import { ChevronsUpDownIcon, TriangleAlertIcon } from "lucide-react";

import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

type Slot =
  | {
      kind: "event";
      id: string;
      start: string;
      end: string;
      title: string;
      room: string;
      conflict?: boolean;
    }
  | { kind: "now"; id: string; time: string }
  | { kind: "gap"; id: string; text: string };

const slots: Slot[] = [
  {
    kind: "event",
    id: "s1",
    start: "09:00",
    end: "09:30",
    title: "Platform standup",
    room: "Huddle room 2",
  },
  {
    kind: "event",
    id: "s2",
    start: "10:00",
    end: "11:00",
    title: "Checkout redesign review",
    room: "Video call",
  },
  { kind: "now", id: "now", time: "11:24" },
  {
    kind: "event",
    id: "s3",
    start: "12:00",
    end: "13:00",
    title: "Lunch with Amara",
    room: "Café Lumen",
  },
  {
    kind: "event",
    id: "s4",
    start: "12:30",
    end: "13:00",
    title: "Vendor call — Parcelly",
    room: "Video call",
    conflict: true,
  },
  { kind: "gap", id: "gap", text: "2h 30m free · good for focus time" },
  {
    kind: "event",
    id: "s5",
    start: "15:30",
    end: "16:15",
    title: "1:1 with Devon",
    room: "Room 4B",
  },
];

export default function Marker11() {
  const [showPast, setShowPast] = React.useState(false);
  const nowIndex = slots.findIndex((slot) => slot.kind === "now");
  const pastCount = nowIndex;
  const visible = showPast ? slots : slots.slice(nowIndex);
  const listId = React.useId();

  return (
    <section
      aria-labelledby="marker-11-title"
      className="flex w-full max-w-sm flex-col gap-3 rounded-xl border border-border bg-card p-4 text-card-foreground"
    >
      <div className="flex items-baseline justify-between gap-3">
        <h3 id="marker-11-title" className="text-sm font-medium">
          Thursday agenda
        </h3>
        <span className="text-xs text-muted-foreground">Sep 25</span>
      </div>

      <Marker
        render={<button type="button" />}
        aria-expanded={showPast}
        aria-controls={listId}
        onClick={() => setShowPast((value) => !value)}
        className="cursor-pointer rounded-md py-1 text-xs outline-none hover:text-foreground focus-visible:ring-3 focus-visible:ring-ring/50"
      >
        <MarkerIcon>
          <ChevronsUpDownIcon />
        </MarkerIcon>
        <MarkerContent>
          {showPast ? "Hide" : "Show"} {pastCount} earlier meetings
        </MarkerContent>
      </Marker>

      <ol id={listId} aria-label="Meetings" className="flex flex-col gap-2">
        {visible.map((slot) => {
          if (slot.kind === "now") {
            return (
              <li key={slot.id} aria-label={`Current time ${slot.time}`}>
                <Marker
                  variant="separator"
                  className="text-xs font-medium text-primary before:bg-primary after:bg-primary"
                >
                  <MarkerContent>Now · {slot.time}</MarkerContent>
                </Marker>
              </li>
            );
          }
          if (slot.kind === "gap") {
            return (
              <li key={slot.id}>
                <Marker className="justify-center py-1 text-xs">
                  <MarkerContent>{slot.text}</MarkerContent>
                </Marker>
              </li>
            );
          }
          const past = slots.indexOf(slot) < nowIndex;
          return (
            <li key={slot.id} className="flex flex-col gap-1">
              <div
                className={
                  past
                    ? "flex gap-3 rounded-lg bg-muted/50 p-2.5 text-muted-foreground"
                    : "flex gap-3 rounded-lg border border-border bg-background p-2.5"
                }
              >
                <div className="flex w-11 shrink-0 flex-col text-xs tabular-nums">
                  <time className="font-medium">{slot.start}</time>
                  <time className="text-muted-foreground">{slot.end}</time>
                </div>
                <div className="flex min-w-0 flex-col">
                  <span className="truncate text-sm font-medium">
                    {slot.title}
                  </span>
                  <span className="truncate text-xs text-muted-foreground">
                    {slot.room}
                  </span>
                </div>
              </div>
              {slot.conflict && (
                <Marker className="pl-1 text-xs text-destructive">
                  <MarkerIcon>
                    <TriangleAlertIcon />
                  </MarkerIcon>
                  <MarkerContent>
                    Overlaps with Lunch with Amara ·{" "}
                    <a href="#reschedule-parcelly">Suggest a new time</a>
                  </MarkerContent>
                </Marker>
              )}
            </li>
          );
        })}
      </ol>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import {
  CircleCheckIcon,
  GitCommitHorizontalIcon,
  GitMergeIcon,
  GitPullRequestArrowIcon,
  MessageSquareDotIcon,
} from "lucide-react";

import { Avatar, AvatarFallback } from "@/components/ui/avatar";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";

const commits = [
  { sha: "a41c9e2", message: "Add token bucket to export endpoint" },
  { sha: "7d03b18", message: "Return Retry-After header on 429" },
];

export default function Marker12() {
  const [resolved, setResolved] = React.useState(false);
  const [merged, setMerged] = React.useState(false);

  return (
    <section
      aria-labelledby="marker-12-title"
      className="flex w-full max-w-md flex-col gap-4 rounded-xl border border-border bg-card p-4 text-card-foreground"
    >
      <header className="flex flex-col gap-1.5">
        <div className="flex items-center gap-2">
          {merged ? (
            <Badge>
              <GitMergeIcon aria-hidden="true" />
              Merged
            </Badge>
          ) : (
            <Badge variant="outline">
              <GitPullRequestArrowIcon aria-hidden="true" />
              Open
            </Badge>
          )}
          <span className="text-xs text-muted-foreground">PR 1289</span>
        </div>
        <h3 id="marker-12-title" className="text-sm font-medium">
          Rate limit the CSV export endpoint
        </h3>
      </header>

      <ol aria-label="Pull request activity" className="flex flex-col gap-3">
        <li className="flex flex-col gap-1.5">
          <Marker className="text-xs">
            <MarkerIcon>
              <GitCommitHorizontalIcon />
            </MarkerIcon>
            <MarkerContent>
              <span className="font-medium text-foreground">nadia-k</span>{" "}
              pushed 2 commits
            </MarkerContent>
          </Marker>
          <ul className="ml-6 flex flex-col gap-1">
            {commits.map((commit) => (
              <li
                key={commit.sha}
                className="flex items-center justify-between gap-3 text-xs"
              >
                <span className="truncate">{commit.message}</span>
                <code className="shrink-0 rounded bg-muted px-1.5 py-0.5 font-mono text-[0.7rem] text-muted-foreground">
                  {commit.sha}
                </code>
              </li>
            ))}
          </ul>
        </li>

        <li
          className={
            resolved
              ? "flex flex-col gap-2 rounded-lg border border-border bg-muted/40 p-3"
              : "flex flex-col gap-2 rounded-lg border border-border p-3"
          }
        >
          <Marker variant="border" className="text-xs">
            <MarkerIcon>
              <MessageSquareDotIcon />
            </MarkerIcon>
            <MarkerContent className="font-mono">
              src/routes/export.ts · line 42
            </MarkerContent>
          </Marker>
          <div className="flex gap-2.5">
            <Avatar className="size-6">
              <AvatarFallback className="text-[0.65rem]">RB</AvatarFallback>
            </Avatar>
            <p className="text-sm">
              <span className="font-medium">Ravi Bose</span> — Should the bucket
              be per API key instead of per IP? Shared office networks will hit
              this fast.
            </p>
          </div>
          <div className="flex flex-wrap items-center justify-between gap-2">
            <Marker
              role="status"
              className="w-auto text-xs data-[resolved=true]:text-foreground"
              data-resolved={resolved}
            >
              {resolved && (
                <MarkerIcon>
                  <CircleCheckIcon />
                </MarkerIcon>
              )}
              <MarkerContent>
                {resolved ? "Resolved by you" : "1 unresolved thread"}
              </MarkerContent>
            </Marker>
            {merged ? null : (
              <Button
                variant="outline"
                size="xs"
                onClick={() => setResolved((value) => !value)}
              >
                {resolved ? "Unresolve" : "Resolve conversation"}
              </Button>
            )}
          </div>
        </li>

        <li>
          <Marker className="text-xs">
            <MarkerIcon>
              <CircleCheckIcon />
            </MarkerIcon>
            <MarkerContent>
              All checks passed on 7d03b18 · <a href="#pr-1289-checks">Details</a>
            </MarkerContent>
          </Marker>
        </li>

        {merged && (
          <li>
            <Marker className="text-xs text-foreground">
              <MarkerIcon>
                <GitMergeIcon />
              </MarkerIcon>
              <MarkerContent>
                <span className="font-medium">You</span> squashed and merged
                into main
              </MarkerContent>
            </Marker>
          </li>
        )}
      </ol>

      <div className="flex flex-wrap items-center justify-between gap-3 border-t border-border pt-3">
        <p role="status" className="text-xs text-muted-foreground">
          {merged
            ? "Merged just now."
            : resolved
              ? "Ready to merge."
              : "Resolve open threads before merging."}
        </p>
        {merged ? (
          <Button size="sm" variant="outline" onClick={() => setMerged(false)}>
            Undo merge
          </Button>
        ) : (
          <Button
            size="sm"
            disabled={!resolved}
            onClick={() => setMerged(true)}
          >
            Squash and merge
          </Button>
        )}
      </div>
    </section>
  );
}

TSX
"use client";

import * as React from "react";
import {
  CheckIcon,
  ChevronRightIcon,
  FileSearchIcon,
  SearchIcon,
  SparklesIcon,
  TableIcon,
} from "lucide-react";

import { Bubble, BubbleContent } from "@/components/ui/bubble";
import { Button } from "@/components/ui/button";
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible";
import {
  Marker,
  MarkerContent,
  MarkerIcon,
} from "@/components/ui/marker";
import { Message, MessageContent } from "@/components/ui/message";

const steps = [
  {
    id: "search",
    icon: SearchIcon,
    label: "Searched workspace for “churn”",
    detail: "12 results in 3 sources",
  },
  {
    id: "read",
    icon: FileSearchIcon,
    label: "Read Q3 retention review.pdf",
    detail: "Pages 4–9",
  },
  {
    id: "query",
    icon: TableIcon,
    label: "Queried subscriptions table",
    detail: "2,184 rows · 380 ms",
  },
];

export default function Marker13() {
  const [open, setOpen] = React.useState(false);
  const [feedback, setFeedback] = React.useState<"up" | "down" | null>(null);

  return (
    <section
      aria-label="Assistant conversation"
      className="flex w-full max-w-md flex-col gap-4 rounded-xl border border-border bg-card p-4 text-card-foreground"
    >
      <Message align="end">
        <MessageContent>
          <Bubble align="end">
            <BubbleContent>
              Why did churn go up for annual plans last quarter?
            </BubbleContent>
          </Bubble>
        </MessageContent>
      </Message>

      <Collapsible open={open} onOpenChange={setOpen}>
        <Marker
          render={<CollapsibleTrigger />}
          className="w-fit cursor-pointer rounded-md py-0.5 text-xs outline-none hover:text-foreground focus-visible:ring-3 focus-visible:ring-ring/50"
        >
          <MarkerIcon>
            <SparklesIcon />
          </MarkerIcon>
          <MarkerContent>Used 3 tools · 4.2s</MarkerContent>
          <ChevronRightIcon
            aria-hidden="true"
            className="size-3.5 transition-transform group-aria-expanded/marker:rotate-90"
          />
        </Marker>
        <CollapsibleContent>
          <ol
            aria-label="Tool calls"
            className="mt-2 ml-2 flex flex-col gap-2 border-l border-border pl-4"
          >
            {steps.map((step) => {
              const Icon = step.icon;
              return (
                <li key={step.id}>
                  <Marker className="items-start text-xs">
                    <MarkerIcon className="mt-0.5">
                      <Icon />
                    </MarkerIcon>
                    <MarkerContent className="flex flex-col">
                      <span className="text-foreground">{step.label}</span>
                      <span>{step.detail}</span>
                    </MarkerContent>
                  </Marker>
                </li>
              );
            })}
          </ol>
        </CollapsibleContent>
      </Collapsible>

      <Message>
        <MessageContent>
          <Bubble variant="ghost">
            <BubbleContent>
              Annual churn rose from 4.1% to 6.8%, and 70% of the increase came
              from accounts that never invited a second teammate. The Q3 review
              ties this to the removal of the onboarding checklist in July.
            </BubbleContent>
          </Bubble>
        </MessageContent>
      </Message>

      <div className="flex flex-wrap items-center justify-between gap-2">
        <Marker className="w-auto text-xs">
          <MarkerContent>
            Sources: <a href="#source-retention">Q3 retention review</a>,{" "}
            <a href="#source-subscriptions">subscriptions</a>
          </MarkerContent>
        </Marker>
        <fieldset className="flex gap-1">
          <legend className="sr-only">Rate this answer</legend>
          <Button
            variant={feedback === "up" ? "secondary" : "ghost"}
            size="xs"
            aria-pressed={feedback === "up"}
            onClick={() => setFeedback(feedback === "up" ? null : "up")}
          >
            Helpful
          </Button>
          <Button
            variant={feedback === "down" ? "secondary" : "ghost"}
            size="xs"
            aria-pressed={feedback === "down"}
            onClick={() => setFeedback(feedback === "down" ? null : "down")}
          >
            Not helpful
          </Button>
        </fieldset>
      </div>

      <div role="status" className="empty:hidden">
        {feedback && (
          <Marker className="text-xs">
            <MarkerIcon>
              <CheckIcon />
            </MarkerIcon>
            <MarkerContent>Thanks — your feedback helps tune answers</MarkerContent>
          </Marker>
        )}
      </div>
    </section>
  );
}