> ## Documentation Index
> Fetch the complete documentation index at: https://anvil.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Chat History – Code

> The ChatHistory provides a new-chat action and single-select list of recent conversations.

export const LiveCode = ({children, customHeight, clickToLoad, example, fullWidth, fullHeight, hideCodeInLiveCode, screenshot, screenshotOnly, showCode: showCodeProp}) => {
  const SCREENSHOTS_BASE = "https://servicetitan.github.io/anvil2-docs-live-code/screenshots";
  const STACKBLITZ_BASE = "https://stackblitz.com/github/servicetitan/anvil2-docs-live-code/tree/main/examples";
  const [showCodeBlock, setShowCodeBlock] = useState(showCodeProp ?? false);
  const [isLocalOverride, setIsLocalOverride] = useState(false);
  useEffect(() => {
    const examplePath = `/images/live-code-screenshots-tmp/${example}.png`;
    fetch(examplePath, {
      method: "HEAD"
    }).then(r => {
      if (r.ok) setIsLocalOverride(true);
    }).catch(() => {});
  }, [example]);
  const screenshotBase = isLocalOverride ? "/images/live-code-screenshots-tmp" : SCREENSHOTS_BASE;
  if (screenshotOnly) {
    return <Frame className="flex flex-col">
        <div className="flex dark:hidden" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined,
      background: "#FFFFFF"
    }}>
          <img srcset={`${screenshotBase}/${example}.png, ${screenshotBase}/${example}-2x.png 2x`} src={`${screenshotBase}/${example}.png`} alt={example} noZoom />
        </div>
        <div className="hidden dark:flex" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined,
      background: "#141414"
    }}>
          <img srcset={`${screenshotBase}/${example}-dark.png, ${screenshotBase}/${example}-dark-2x.png 2x`} src={`${screenshotBase}/${example}-dark.png`} alt={example} noZoom />
        </div>
      </Frame>;
  }
  if (screenshot) {
    return <Frame className="flex flex-col -mb-2">
        <div className="flex dark:hidden bg-white dark:bg-codeblock border border-gray-950/10 dark:border-white/10 dark:twoslash-dark rounded-2xl overflow-hidden" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined
    }}>
          <img srcset={`${screenshotBase}/${example}.png, ${screenshotBase}/${example}-2x.png 2x`} src={`${screenshotBase}/${example}.png`} alt={example} noZoom />
        </div>

        <div className="hidden dark:flex bg-white dark:bg-codeblock border border-gray-950/10 dark:border-white/10 dark:twoslash-dark rounded-2xl overflow-hidden" style={{
      background: "#141414",
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined
    }}>
          <img srcset={`${screenshotBase}/${example}-dark.png, ${screenshotBase}/${example}-dark-2x.png 2x`} src={`${screenshotBase}/${example}-dark.png`} alt={example} noZoom />
        </div>

        <div className="flex justify-end items-center text-xs py-2 px-1 gap-4">
          {!showCodeProp ? <button className="inline-flex justify-end items-center text-gray-700 dark:text-gray-50 hover:text-blue-500 dark:hover:text-blue-300 transition-colors group self-end gap-1 cursor-pointer" onClick={() => setShowCodeBlock(!showCodeBlock)} style={{
      appearance: "none"
    }}>
              <Icon icon="code" size="12px" className="group-hover:bg-blue-500 dark:group-hover:bg-blue-300" />
              <span>{showCodeBlock ? "Hide code" : "Show code"}</span>
            </button> : null}

          <a className="inline-flex justify-end items-center hover:text-blue-500 dark:hover:text-blue-300 transition-colors group self-end gap-1" href={`${STACKBLITZ_BASE}/${example}?file=src/App.tsx`} target="_blank" rel="noreferrer">
            <Icon icon="bolt" size="12px" className="group-hover:bg-blue-500 dark:group-hover:bg-blue-300" />
            <span>StackBlitz demo</span>
          </a>
        </div>

        <div className="grid transition-[grid-template-rows] duration-300 ease-in-out overflow-auto overflow-y-hidden overflow-x-auto" style={showCodeBlock ? {
      gridTemplateRows: "1fr"
    } : {
      gridTemplateRows: "0fr"
    }}>
          <div style={{
      minHeight: 0,
      overflowX: "auto",
      overflowY: "hidden",
      marginBlockStart: "-1.25rem",
      marginBlockEnd: "-1.5rem"
    }}>
            {children}
          </div>
        </div>
      </Frame>;
  } else {
    return <div style={{
      display: "flex",
      width: fullWidth ? "100%" : "50%",
      minHeight: customHeight ? customHeight : "316px",
      resize: "vertical",
      overflow: "auto"
    }}>
        <iframe title={example} style={{
      flex: 1,
      width: fullWidth ? "100%" : "50%",
      minHeight: customHeight ? customHeight : "316px"
    }} src={`${STACKBLITZ_BASE}/${example}?embed=1&hideNavigation=1&hideExplorer=1&terminalHeight=0&file=src/App.tsx${clickToLoad ? "&ctl=1" : ""}${hideCodeInLiveCode ? "&view=preview" : ""}`} allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking" sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts" />
      </div>;
  }
};

<Tabs>
  <Tab title="Implementation">
    <LiveCode showCode example="ai-kit-chat-history" fullWidth screenshot>
      ```tsx lines expandable theme={null}
      import { ChatHistory } from "@servicetitan/anvil2-ai-kit";
      import type { ChatHistoryItem } from "@servicetitan/anvil2-ai-kit";

      const items: ChatHistoryItem[] = [
        { id: "q3", label: "Q3 planning notes", subtitle: "35 mins" },
        {
          id: "invoice",
          label: "Invoice discrepancy follow-up",
          subtitle: "2 hours",
        },
        { id: "customer", label: "Customer churn analysis", subtitle: "Yesterday" },
      ];

      function App() {
        return (
          <div
            style={{
              width: 240,
              height: 420,
              background: "var(--carto-color-background-surface, #f5f5f5)",
              borderRadius: 8,
              overflow: "hidden",
            }}
          >
            <ChatHistory items={items} defaultSelectedKeys={["q3"]} />
          </div>
        );
      }

      export default App;
      ```
    </LiveCode>

    ## Common Examples

    To use the `ChatHistory`, pass configured conversations through `items`, handle selection through React Aria's selection APIs, and use `onNewChat` to start a conversation.

    ```tsx theme={null}
    import { ChatHistory } from "@servicetitan/anvil2-ai-kit";

    function ExampleComponent() {
      return (
        <ChatHistory
          items={chats}
          selectedKeys={[activeId]}
          onSelectionChange={(keys) => openChat([...keys][0])}
          onNewChat={startChat}
        />
      );
    }
    ```

    Selection is fixed to single. Omit `items` or pass an empty array to render only the New Chat button.

    ### Selected and unread

    `selectedKeys` controls the active conversation. Set `unread` on an item to add a status dot and localized screen-reader text.

    <LiveCode showCode example="ai-kit-chat-history-selected-state" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { CartoTheme, ChatHistory } from "@servicetitan/anvil2-ai-kit";
      import type { ChatHistoryItem } from "@servicetitan/anvil2-ai-kit";
      import "@servicetitan/anvil2-ai-kit/styles.css";

      const items: ChatHistoryItem[] = [
        { id: "q3", label: "Q3 planning notes", subtitle: "35 mins" },
        {
          id: "invoice",
          label: "Invoice discrepancy follow-up",
          subtitle: "2 hours",
        },
      ];

      function App() {
        return (
          <CartoTheme>
            <div
              style={{
                width: 240,
                height: 220,
                background: "var(--carto-color-background-surface, #f5f5f5)",
                borderRadius: 8,
                overflow: "hidden",
              }}
            >
              <ChatHistory items={items} defaultSelectedKeys={["q3"]} />
            </div>
          </CartoTheme>
        );
      }

      export default App;
      ```
    </LiveCode>

    <LiveCode showCode example="ai-kit-chat-history-unread" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { CartoTheme, ChatHistory } from "@servicetitan/anvil2-ai-kit";
      import type { ChatHistoryItem } from "@servicetitan/anvil2-ai-kit";
      import "@servicetitan/anvil2-ai-kit/styles.css";

      const items: ChatHistoryItem[] = [
        {
          id: "auth",
          label: "Refactoring the auth flow",
          subtitle: "Just now",
          unread: true,
        },
        { id: "q3", label: "Q3 planning notes", subtitle: "35 mins", unread: true },
        { id: "karaoke", label: "Karaoke track separation", subtitle: "Yesterday" },
      ];

      function App() {
        return (
          <CartoTheme>
            <div
              style={{
                width: 240,
                height: 220,
                background: "var(--carto-color-background-surface, #f5f5f5)",
                borderRadius: 8,
                overflow: "hidden",
              }}
            >
              <ChatHistory items={items} />
            </div>
          </CartoTheme>
        );
      }

      export default App;
      ```
    </LiveCode>

    ### Subtitle

    Every item requires a `subtitle`, typically a relative timestamp or last-message stamp. The component renders it verbatim; your application owns formatting and relative-time policy.

    <LiveCode showCode example="ai-kit-chat-history-timestamp" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { CartoTheme, ChatHistory } from "@servicetitan/anvil2-ai-kit";
      import type { ChatHistoryItem } from "@servicetitan/anvil2-ai-kit";
      import "@servicetitan/anvil2-ai-kit/styles.css";

      // `subtitle` is rendered verbatim — the consumer owns any relative-time
      // formatting. These four rows show the range a stamp typically takes: a
      // relative duration, a clock time, a day name, and an absolute date.
      const items: ChatHistoryItem[] = [
        { id: "auth", label: "Refactoring the auth flow", subtitle: "35 mins" },
        { id: "karaoke", label: "Karaoke track separation", subtitle: "10:40am" },
        {
          id: "onboarding",
          label: "Rewrite the onboarding email",
          subtitle: "Yesterday",
        },
        { id: "schema", label: "Postgres schema migration plan", subtitle: "Mar 14" },
      ];

      function App() {
        return (
          <CartoTheme>
            <div
              style={{
                width: 240,
                height: 370,
                background: "var(--carto-color-background-surface, #f5f5f5)",
                borderRadius: 8,
                overflow: "hidden",
              }}
            >
              <ChatHistory items={items} />
            </div>
          </CartoTheme>
        );
      }

      export default App;
      ```
    </LiveCode>

    ### Overflow

    Labels and subtitles truncate to one line. Place `ChatHistory` in a height-constrained container so long lists scroll instead of growing the rail.

    <LiveCode showCode example="ai-kit-chat-history-overflow" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { CartoTheme, ChatHistory } from "@servicetitan/anvil2-ai-kit";
      import type { ChatHistoryItem } from "@servicetitan/anvil2-ai-kit";
      import "@servicetitan/anvil2-ai-kit/styles.css";

      const items: ChatHistoryItem[] = [
        { id: "auth", label: "Refactoring the auth flow", subtitle: "Just now" },
        { id: "q3", label: "Q3 planning notes", subtitle: "35 mins" },
        { id: "karaoke", label: "Karaoke track separation", subtitle: "10:40am" },
        {
          id: "onboarding",
          label: "Rewrite the onboarding email",
          subtitle: "Yesterday",
        },
        {
          id: "schema",
          label: "Postgres schema migration plan",
          subtitle: "Yesterday",
        },
        { id: "pricing", label: "Pricing page copy review", subtitle: "Friday" },
        { id: "incident", label: "Incident postmortem draft", subtitle: "Mar 14" },
        { id: "roadmap", label: "2027 roadmap brainstorm", subtitle: "Mar 12" },
      ];

      function App() {
        return (
          <CartoTheme>
            <div
              style={{
                width: 240,
                height: 280,
                background: "var(--carto-color-background-surface, #f5f5f5)",
                borderRadius: 8,
                overflow: "hidden",
              }}
            >
              <ChatHistory items={items} defaultSelectedKeys={["karaoke"]} />
            </div>
          </CartoTheme>
        );
      }

      export default App;
      ```
    </LiveCode>

    ## Internationalization

    `ChatHistory` owns these localized strings:

    * `ai-kit.chatHistory.newChat`
    * `ai-kit.chatHistory.list`
    * `ai-kit.chatHistory.unread`
    * `ai-kit.chatHistory.recents`

    Localize each item's `label` and `subtitle` before passing it. Mount `AiKitIntlProvider` inside `CartoTheme` to switch the built-in strings.

    ## React Accessibility

    * React Aria supplies single-selection listbox semantics, arrow-key navigation, and typeahead.
    * Each item label is its accessible name; `subtitle` is its accessible description.
    * Unread items include localized hidden text. The visual status dot is decorative.
    * Pass `aria-label` or `aria-labelledby` to override the localized list name.
  </Tab>

  <Tab title="ChatHistory Props">
    ```tsx theme={null}
    <ChatHistory
      items={chats}
      selectedKeys={[activeId]}
      onSelectionChange={setActive}
      onNewChat={startChat}
    />
    ```

    ## `ChatHistory` Props

    The `ChatHistory` accepts the following props and forwards remaining React Aria `ListBox` props except layout, orientation, selection mode, and composed children.

    <ParamField path="className" type="string">
      Class merged onto the rail container.
    </ParamField>

    <ParamField path="items" type="ChatHistoryItem[]">
      Conversations to list in display order. Omit or pass an empty array for
      no history.
    </ParamField>

    <ParamField path="onNewChat" type="() => void">
      Handles the New Chat button.
    </ParamField>

    <ParamField path="onSelectionChange" type="(keys: Selection) => void">
      Called when the selected conversation changes.
    </ParamField>

    <ParamField path="selectedKeys" type="Selection">
      Controlled selected conversation key.
    </ParamField>
  </Tab>

  <Tab title="ChatHistoryItem">
    ```tsx theme={null}
    const chat: ChatHistoryItem = {
      id: "invoice-review",
      label: "Invoice review",
      subtitle: "5 minutes ago",
      unread: true,
    };
    ```

    ## `ChatHistoryItem`

    <ParamField path="id" type="Key" required>
      Selection key reported through listbox selection APIs.
    </ParamField>

    <ParamField path="label" type="string" required>
      Visible conversation title and accessible name.
    </ParamField>

    <ParamField path="subtitle" type="string" required>
      Visible secondary line and accessible description. Supply formatted,
      localized text.
    </ParamField>

    <ParamField path="isDisabled" type="boolean">
      Prevents focus and selection.
    </ParamField>

    <ParamField path="unread" type="boolean" default="false">
      Displays an unread indicator and adds localized hidden text.
    </ParamField>
  </Tab>
</Tabs>