# Case strip dumbbell

> Where the new version fixed or broke cases. Sample data: eight areas, v13 production against v14 candidate, tool choice +12.5 pt, tone −8.3 pt.

- Type 108 · Compare items
- Component: `<CaseStripDumbbell>`, the same name as the Figma component
- Install: `npx shadcn add @chartory/case-strip-dumbbell` (Code and Complete plans)
- Type page: https://usechartory.com/charts/case-strip-dumbbell

## Installation

1. **Set up the registry once.** Your token in .env and @chartory in components.json. Skip this when another chart is already installed. [Installation guide](https://usechartory.com/docs/installation)

2. **Add the chart.** One command adds the Case strip dumbbell component to your project.

```bash
npx shadcn add @chartory/case-strip-dumbbell
```

3. **Use it.** Pass your rows. The props are the Figma properties.

usage.tsx:

```tsx
import { CaseStripDumbbell }
  from "@/components/chartory/case-strip-dumbbell"

<CaseStripDumbbell
  data={versionCases}
  size="m"
  legend
/>
```

## Props

### `<CaseStripDumbbell>`

Every prop but data is a Figma property with the same name and values.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| data | CaseStripDumbbellData | Required | The chart's data. The tables below list every field. |
| size | "xs" \| "s" \| "m" \| "l" | "m" | The size class. Each one is laid out again from the data. |
| legend | boolean | true | Shows the legend row under the plot. |
| color | "cat-1" \| "cat-2" \| "cat-3" \| "cat-4" | "cat-1" | The data colour of the primary marks (data/primary). |

### CaseStripDumbbellData

The data prop: one object for the whole chart.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| min | number | Required | The bottom of the value scale. |
| max | number | Required | The top of the value scale. |
| target | number | Required | The target value. |
| ticks | [number, string][] | Required | The axis ticks: [value, label] pairs. |
| rows | CaseStripDumbbellRow[] | Required | One entry per row. |

### CaseStripDumbbellRow

One object per entry in rows.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| label | string | Required | The name shown on the chart. |
| a | number | Required | The value before. |
| b | number | Required | The value after. |
| fixed | number | Required | The fixed count. |
| regressed | number | Required | The regressed count. |
| still | number | Required | The count still failing. |
| sel? | boolean | false | Marks the row as selected. |

## Case strip dumbbell: a React and Figma chart in four sizes

### What does a case strip dumbbell show?

A case strip dumbbell compares production and a candidate area by area, with the change written next to each. Fixed, regressed and still-failing cases take their own colours. Use it to review a prompt or model change before release.

Chartory ships it as a Figma component and a React component with the same name. The code installs from the shadcn registry with one command and lands in your project as a file you own.

### What is the Case strip dumbbell component?

It is one **<CaseStripDumbbell>** component. Its props are the Figma properties with the same names and values, and the props table above lists them. The data is two scores per area, case outcomes.

Sizes **XS**, **S**, **M** and **L** re-lay the chart out from the data instead of scaling it, so labels stay readable at every size.

### When should I use it?

- **Are two versions compared?** Yes means the case strip dumbbell fits.
- **Is it per area?** Yes means the case strip dumbbell fits.
- **Do individual cases matter?** Yes means the case strip dumbbell fits.

### When does another type fit better?

- **Many versions in order.** Use Version ribbon instead.
- **One pass rate per suite.** Use Eval suite bars instead.
- **Just two values per item.** Use Dumbbell instead.

## Case strip dumbbell questions

### Does the Case strip dumbbell chart work with shadcn/ui?

Yes. It installs through the shadcn registry with the shadcn CLI, and the file lands in your project.

### How do I install it?

Add your token and the @chartory registry once, then run npx shadcn add @chartory/case-strip-dumbbell. The Installation guide has the steps.

### Can my coding agent install it?

Yes. Connect the Chartory MCP server and ask for the case strip dumbbell chart; the agent runs the same command and you review the diff.

### What data does it expect?

Two scores per area, case outcomes. The sample data comes with the component, and the props table lists every field.

### Which sizes does it ship in?

XS, S, M and L, in Figma and in code. Each size is laid out again from the data, so text and lines keep their size.

### Is it in the Figma file too?

Yes. chart/108-case-strip-dumbbell has the same properties as the component.

### Does it follow light and dark mode?

Yes. Every paint is a token, so the chart follows light and dark mode and the collection you pick.

### Which plan has the code?

Code and Complete. Figma has the Figma file only.