> ## 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.

# Diff Value – Code

> The DiffValue component presents previous and proposed values with an accessible change summary.

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-diff-value" fullWidth screenshot>
      ```tsx lines expandable theme={null}
      import { DiffValue } from "@servicetitan/anvil2-ai-kit";

      function App() {
        return <DiffValue from="6.5h" to="8.0h" />;
      }

      export default App;
      ```
    </LiveCode>

    ## Common Examples

    To use the `DiffValue`, import it from `@servicetitan/anvil2-ai-kit` and pass the previous value through `from` and the proposed value through `to`.

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

    function ExampleComponent() {
      return <DiffValue from="6.5h" to="8.0h" />;
    }
    ```

    ### Automatic layout

    `DiffValue` uses inline layout for short, single-line values. It switches to block layout when either value exceeds 80 characters or contains a newline. Pass `layout` to override the automatic choice.

    <LiveCode showCode example="ai-kit-diff-value-layout-inline" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { DiffValue } from "@servicetitan/anvil2-ai-kit";

      function App() {
        return <DiffValue from="6.5h" to="8.0h" layout="inline" />;
      }

      export default App;
      ```
    </LiveCode>

    <LiveCode showCode example="ai-kit-diff-value-layout-block" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { DiffValue } from "@servicetitan/anvil2-ai-kit";

      function App() {
        return (
          <div style={{ maxWidth: "28rem" }}>
            <DiffValue
              from="Standard repair visit with one replacement part."
              to="Extended repair visit including compressor diagnostics, refrigerant recharge, and replacement of the contactor and capacitor per technician notes."
              layout="block"
            />
          </div>
        );
      }

      export default App;
      ```
    </LiveCode>

    ### Empty and removed values

    Omit `from`, pass `null`, or pass whitespace to render the localized empty label. Do the same for `to` to render the localized removed label.

    <LiveCode showCode example="ai-kit-diff-value-empty-and-removed-values" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { DiffValue, Text } from "@servicetitan/anvil2-ai-kit";

      function App() {
        return (
          <div style={{ display: "flex", flexDirection: "column", gap: 12 }}>
            <div>
              <Text variant="eyebrow" text="Empty to value" />
              <DiffValue to="8.0h" />
            </div>
            <div>
              <Text variant="eyebrow" text="Value to removed" />
              <DiffValue from="6.5h" />
            </div>
          </div>
        );
      }

      export default App;
      ```
    </LiveCode>

    ### Truncation

    Block layout uses [`TruncatedText`](/docs/kits/ai-kit/components/truncated-text/code). Set `truncateLines` to control the collapsed line limit.

    <LiveCode showCode example="ai-kit-diff-value-truncation" screenshot fullWidth>
      ```tsx lines expandable theme={null}
      import { DiffValue } from "@servicetitan/anvil2-ai-kit";

      function App() {
        return (
          <div style={{ maxWidth: "28rem" }}>
            <DiffValue
              from="The AI Adoption Maturity Model is a framework for assessing the ability of an organization to perform and sustain specific technical practices to achieve two key, high-level goals."
              to="Revised invoice summary with additional labor detail and updated scope notes that exceed the inline threshold for block layout rendering."
              layout="block"
              truncateLines={2}
            />
          </div>
        );
      }

      export default App;
      ```
    </LiveCode>

    ## Internationalization

    `DiffValue` uses three messages:

    * `ai-kit.diffValue.empty`
    * `ai-kit.diffValue.removed`
    * `ai-kit.diffValue.changedFromTo`

    English is the default. Mount `AiKitIntlProvider` inside `CartoTheme` to switch locale or override these strings. The `changedFromTo` message receives `{from}` and `{to}` values.

    ```tsx theme={null}
    <AiKitIntlProvider
      messages={{
        "ai-kit.diffValue.empty": "Empty",
        "ai-kit.diffValue.removed": "Removed",
        "ai-kit.diffValue.changedFromTo": "Changed from {from} to {to}",
      }}
    >
      <DiffValue from="Draft" to="Approved" />
    </AiKitIntlProvider>
    ```

    ## React Accessibility

    * A visually hidden localized summary announces the relationship as "Changed from X to Y."
    * Inline layout hides duplicate visual values from assistive technology.
    * Block layout keeps Show more and Show less controls reachable when either value is truncated.
    * The arrow is decorative and hidden from assistive technology.
  </Tab>

  <Tab title="DiffValue Props">
    ```tsx theme={null}
    <DiffValue
      from="Previous value"
      to="Proposed value"
      layout="block"
      truncateLines={2}
    />
    ```

    ## `DiffValue` Props

    The `DiffValue` accepts the following props.

    <ParamField path="className" type="string">
      Class merged onto the root element.
    </ParamField>

    <ParamField path="from" type="string | null">
      Previous value. Omit, pass `null`, or pass only whitespace to render the
      localized empty label.
    </ParamField>

    <ParamField path="layout" type={`"inline" | "block"`}>
      Layout mode. When omitted, long or multiline values use `"block"` and
      other values use `"inline"`.
    </ParamField>

    <ParamField path="to" type="string | null">
      Proposed value. Omit, pass `null`, or pass only whitespace to render the
      localized removed label.
    </ParamField>

    <ParamField path="truncateLines" type="number" default="2">
      Maximum lines before truncation in block layout.
    </ParamField>
  </Tab>
</Tabs>