> ## 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.

# UserMessage – Design

> User messages display content sent by the user in a conversation.

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>;
  }
};

export const CodePreviewPlaceholder = ({double, fullWidth}) => {
  const single = <div style={{
    width: fullWidth ? "100%" : "50%",
    borderRadius: "1rem",
    display: "flex",
    padding: "1rem",
    flexDirection: "column",
    gap: "0.5rem",
    height: "10rem",
    marginBlockEnd: "1rem"
  }} className="border-width-default border-color-subdued">
      <div className="bg-strong border-radius-large" style={{
    width: "100%",
    flexGrow: "1"
  }} />
      <div className="bg-strong border-radius-large" style={{
    width: "100%",
    flexGrow: "1"
  }} />
    </div>;
  return double ? <div style={{
    display: "flex",
    gap: "1rem"
  }}>
      {single}
      {single}
    </div> : single;
};

<LiveCode example="carto-user-message" screenshot fullWidth>
  ```tsx lines theme={null}
  import { UserMessage } from "@servicetitan/carto-react-kit";

  function App() {
    return (
      <UserMessage
        content="Hey — can you take a look at this?"
        timestamp={new Date(2026, 3, 1, 16, 40)}
      />
    );
  }

  export default App;
  ```
</LiveCode>

## Options

UserMessage supports arbitrary content and an optional error line with a retry action.

### Message Content

<LiveCode example="carto-user-message-content-length" screenshot fullWidth>
  ```tsx lines theme={null}
  import { UserMessage } from "@servicetitan/carto-react-kit";

  function App() {
    return (
      <div
        style={{
          display: "flex",
          flexDirection: "column",
          gap: 16,
          maxWidth: "48rem",
        }}
      >
        {/* Short */}
        <UserMessage
          content="Hey — can you take a look at this?"
          timestamp={new Date(2026, 3, 1, 16, 40)}
        />

        {/* Long — wraps at the 640px cap */}
        <UserMessage
          content="Here's a longer message that exceeds the comfortable single-line width of the bubble, so it wraps onto multiple lines and never exceeds the 640px cap."
          timestamp={new Date(2026, 3, 1, 16, 41)}
        />
      </div>
    );
  }

  export default App;
  ```
</LiveCode>

The bubble caps at 640px and wraps long content; short messages stay compact. `content` accepts any `ReactNode` — a plain string, inline composition (Carto `Link`, `strong`, etc.), or a rendered Markdown tree.

### Error

<LiveCode example="carto-user-message-error" screenshot fullWidth>
  ```tsx lines theme={null}
  import { UserMessage } from "@servicetitan/carto-react-kit";

  function App() {
    return (
      <UserMessage
        content="Can you look at this?"
        error="Message not delivered."
        onRetry={() => {}}
        timestamp={new Date(2026, 3, 1, 16, 40)}
      />
    );
  }

  export default App;
  ```
</LiveCode>

`error` renders a message below the bubble. Pair it with `onRetry` to add a retry action to the toolbar — the button appears only when both are set.

## Behavior

The toolbar's actions and visibility both respond to the message's content and its position in the conversation.

### Content Length

The bubble never truncates or clips its content — it only wraps. There's no maximum height or line count; a long message simply grows taller.

### Toolbar Actions

<LiveCode example="carto-user-message-toolbar-actions" screenshot fullWidth>
  ```tsx lines theme={null}
  import { UserMessage } from "@servicetitan/carto-react-kit";

  function App() {
    return (
      <div
        style={{
          display: "flex",
          flexDirection: "column",
          gap: 16,
          maxWidth: "48rem",
        }}
      >
        {/* Copy only */}
        <UserMessage
          content="Hey — can you take a look at this?"
          timestamp={new Date(2026, 3, 1, 16, 40)}
        />

        {/* Copy + retry */}
        <UserMessage
          content="Can you look at this?"
          error="Message not delivered."
          onRetry={() => {}}
          timestamp={new Date(2026, 3, 1, 16, 41)}
        />
      </div>
    );
  }

  export default App;
  ```
</LiveCode>

The toolbar always shows the timestamp, plus a copy action whenever there's text to copy; retry joins them only when `error` is also set. Copy is text-only — pass `copyText` for rich content (Markdown, fragments, images) to keep the message copyable; a message with no text shows no copy button.

### Reveal Toolbar on Hover

<LiveCode example="carto-user-message-reveal-toolbar-on-hover" screenshot fullWidth>
  ```tsx lines theme={null}
  import { UserMessage } from "@servicetitan/carto-react-kit";

  function App() {
    return (
      <div
        style={{
          display: "flex",
          flexDirection: "column",
          gap: 12,
          maxWidth: "48rem",
        }}
      >
        {/* Earlier message — toolbar hidden until hover or focus (pinned to its hover state here) */}
        <UserMessage
          content="First message — hover to reveal the toolbar."
          timestamp={new Date(2026, 3, 1, 16, 35)}
          revealToolbarOnHover
        />

        {/* Latest message — toolbar always visible */}
        <UserMessage
          content="Latest message — toolbar always visible."
          timestamp={new Date(2026, 3, 1, 16, 40)}
        />
      </div>
    );
  }

  export default App;
  ```
</LiveCode>

Set `revealToolbarOnHover` on every message except the most recent of its type, so only the latest keeps its toolbar always visible — earlier messages reveal theirs on hover or keyboard focus. This distinction doesn't apply on touch (coarse-pointer) devices, which always show the toolbar regardless of `revealToolbarOnHover`.

## Keyboard Interaction

Users can navigate and activate toolbar actions using standard keyboard controls; focus also reveals a hidden toolbar.

| Key           | Description                                          |
| ------------- | ---------------------------------------------------- |
| Tab           | Moves focus into the toolbar, revealing it if hidden |
| Arrow keys    | Moves focus between toolbar actions                  |
| Enter / Space | Activates the focused action                         |