# packages/core/src/features/viz/lib/scale-adjust.tsx This is the source snapshot used to build these API details. [View this revision on GitHub](https://github.com/benlesh/pibbl/blob/272a94aaf62e0bd6ad8726a4c607a76a9ec44ca1/packages/core/src/features/viz/lib/scale-adjust.tsx#L13). [Back to reference](/reference/components/scale-adjust/)

1 import { Group, resolveSignalValue } from "@pibbl/core";
2 import type { ScaleAdjustProps, ResolvedScale, BandCategory } from "./types.js";
3 import { lookupScale } from "./scale-context.js";
4 /**
5  * Adjusts descendant placement using configured x and y scales.
6  *
7  * @param props - Scale identity and domain or range adjustments for descendants. See
8  * {@link ScaleAdjustProps} .
9  * @returns Child content evaluated with the adjusted scale.
10  *
11  * @see {@link ScaleAdjustProps}
12  */
13 export function ScaleAdjust(props: ScaleAdjustProps) {
14   const x = lookupScale(props.xScale, "ScaleAdjust");
15   const y = lookupScale(props.yScale, "ScaleAdjust");
16   if (
17     (props.x === undefined) !== (props.xScale === undefined) ||
18     (props.y === undefined) !== (props.yScale === undefined)
19   )
20     throw new TypeError("ScaleAdjust coordinates require matching scale IDs.");
21   const coordinate = (scale: ResolvedScale, value: BandCategory) => {
22     if (scale.type === "band") throw new TypeError("ScaleAdjust requires continuous or point scales.");
23     if (scale.type !== "point" && typeof value !== "number") throw new TypeError("ScaleAdjust continuous coordinates must be numbers.");
24     const result = scale.type === "point" ? scale.map(value) : scale.map(value as number);
25     if (result === undefined) throw new RangeError("ScaleAdjust point category is not in the domain.");
26     return result;
27   };
28   return (
29     <Group
30       style={{
31         translateX: x ? coordinate(x.get(), resolveSignalValue(props.x!)) : 0,
32         translateY: y ? coordinate(y.get(), resolveSignalValue(props.y!)) : 0,
33       }}
34     >
35       {props.children}
36     </Group>
37   );
38 }
39

## Documentation version Documentation built with @pibbl/core 0.0.2, revision 272a94a. ALPHA — NOT FOR PRODUCTION USE.