> ## 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.

# Line

> Line chart implementation for @servicetitan/anvil2-charts-kit.

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>;
  }
};

A line chart shows trends over time. Use `variant="categorical"`: the Anvil2 line variable order follows that palette, and the pale patterned monochrome steps are fill treatments that a stroke cannot carry. Limit a line chart to six series, which matches the marker shape sequence and the Anvil2 clarity guidance.

* Design rules: [Line charts](/docs/web/data-visualization/line-charts)
* Shared API / tooltips / palettes: [Chart component](/docs/kits/charts-react/chart)

***

## Minimal option

Define structure and data in the option. Colors and markers come from `variant`.

<LiveCode showCode example="charts-react-line" fullWidth screenshot>
  ```tsx lines expandable theme={null}
  import { Chart, type EChartsOption } from "@servicetitan/anvil2-charts-kit";
  import "@servicetitan/anvil2-charts-kit/styles.css";

  const months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"];

  function App() {
    const option: EChartsOption = {
      grid: { left: 48, right: 16, top: 24, bottom: 84 },
      legend: { bottom: 0 },
      xAxis: { type: "category", boundaryGap: false, data: months },
      yAxis: { type: "value" },
      series: [
        { type: "line", name: "Revenue", data: [820, 932, 901, 934, 1290, 1330] },
        { type: "line", name: "Costs", data: [620, 732, 701, 734, 1090, 1130] },
        { type: "line", name: "Profit", data: [200, 200, 200, 200, 200, 200] },
      ],
    };

    return (
      <Chart option={option} variant="categorical" width={480} height={300} />
    );
  }

  export default App;
  ```
</LiveCode>

***

## Variant styling

`variant` applies the following treatment:

| Concern      | Behavior                                                                      |
| ------------ | ----------------------------------------------------------------------------- |
| Color        | Categorical palette by series index                                           |
| Markers      | Disabled below three series. At three or more, the Anvil2 shape order applies |
| Stroke width | Theme defaults                                                                |

Pass `variant="categorical"` rather than authoring `symbol` or `symbolSize` lists. Avoid `variant="monochrome"` on a line chart, because the pale upper steps lose contrast against a light surface.

***

## Dotted and dashed strokes

A solid stroke represents actual values, and a dotted or dashed stroke represents a target, forecast, or comparison. Keep `variant="categorical"` for color and set `lineStyle.type` to `"dotted"` or `"dashed"` on the series that needs it. A consumer-defined `lineStyle` merges with the variant's stroke color.

<LiveCode showCode example="charts-react-line-dotted" fullWidth screenshot>
  ```tsx lines expandable theme={null}
  import { Chart, type EChartsOption } from "@servicetitan/anvil2-charts-kit";
  import "@servicetitan/anvil2-charts-kit/styles.css";

  function App() {
    const option: EChartsOption = {
      grid: { left: 48, right: 16, top: 24, bottom: 84 },
      legend: { bottom: 0 },
      xAxis: {
        type: "category",
        boundaryGap: false,
        data: ["Jan", "Feb", "Mar", "Apr", "May", "Jun"],
      },
      yAxis: { type: "value" },
      series: [
        {
          type: "line",
          name: "Actual",
          data: [820, 932, 901, 934, 1290, 1330],
        },
        {
          type: "line",
          name: "Target",
          data: [520, 610, 590, 640, 780, 820],
          lineStyle: { type: "dotted" },
        },
      ],
    };

    return (
      <Chart option={option} variant="categorical" width={480} height={300} />
    );
  }

  export default App;
  ```
</LiveCode>

***

## Tooltips

Pass `renderTooltip` to add hover content. See [Chart component](/docs/kits/charts-react/chart#tooltips). A line with markers reports the single point under the pointer, and a line without markers reports the whole category.

<LiveCode showCode example="charts-react-line-tooltip" fullWidth screenshot>
  ```tsx lines expandable theme={null}
  import {
    Chart,
    type ChartTooltipInfo,
    type EChartsOption,
  } from "@servicetitan/anvil2-charts-kit";
  import "@servicetitan/anvil2-charts-kit/styles.css";
  import { CartoTheme, Text, TooltipSurface } from "@servicetitan/anvil2-ai-kit";
  // This file is most likely already in your workspace
  import "@servicetitan/anvil2-ai-kit/styles.css";

  const months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"];

  function renderTooltip({ name, points }: ChartTooltipInfo) {
    return (
      <TooltipSurface
        content={
          <>
            <Text text={name} />
            {points.map((point) => (
              <Text
                key={point.seriesIndex}
                text={`${point.seriesName ? `${point.seriesName}: ` : ""}${String(point.value)}`}
              />
            ))}
          </>
        }
      />
    );
  }

  function App() {
    const option: EChartsOption = {
      grid: { left: 48, right: 16, top: 24, bottom: 84 },
      legend: { bottom: 0 },
      xAxis: { type: "category", boundaryGap: false, data: months },
      yAxis: { type: "value" },
      series: [
        { type: "line", name: "Revenue", data: [820, 932, 901, 934, 1290, 1330] },
        { type: "line", name: "Costs", data: [620, 732, 701, 734, 1090, 1130] },
        { type: "line", name: "Profit", data: [200, 200, 200, 200, 200, 200] },
      ],
    };

    return (
      <CartoTheme>
        <Chart
          option={option}
          variant="categorical"
          renderTooltip={renderTooltip}
          width={480}
          height={300}
        />
      </CartoTheme>
    );
  }

  export default App;
  ```
</LiveCode>