# TransformingActionInput

> Marketing entry-point input that morphs between surface modes, from a prompt bar into a chat handoff; pairs with ChatWidget.

- Status: beta
- Group: form
- Page: https://www.digitaltableteur.com/design-system/components/transforming-action-input
- Contract: https://www.digitaltableteur.com/contracts/v1/TransformingActionInput.contract.json

## When to use

Marketing entry-point input that morphs between surface modes (prompt bar into chat handoff). Pairs with ChatWidget.

## When not to use

The contract records no forbidden uses.

## Look-alikes

The contract names no look-alike with a deciding condition.

## Props

| Prop | Type | Default | Description | Required |
| --- | --- | --- | --- | --- |
| `initialMode` | `"button" \| "input"` | `button` | Initial surface mode before transformation. | No |
| `value` | `string` | none | Optional controlled value. | No |
| `defaultValue` | `string` | `""` | Default value when uncontrolled. | No |
| `disabled` | `boolean` | `false` | Disabled state for both button and input. | No |
| `actionLabelKey` | `string` | `transformingActionInput.trigger` | Translation key for the trigger label. | No |
| `inputLabelKey` | `string` | `transformingActionInput.label` | Translation key for the input label. | No |
| `helperTextKey` | `string` | `transformingActionInput.helper` | Translation key for helper text below the input. | No |
| `placeholderKey` | `string` | `transformingActionInput.placeholder` | Translation key for the placeholder. | No |
| `onChange` | `(value: string) => void` | none | Triggered when value changes. | No |
| `onSubmit` | `(value: string) => void` | none | Triggered on submit in input mode. | No |
| `stayInInputMode` | `boolean` | `false` | When true, retains the input after submit instead of returning to button mode. | No |
| `className` | `string` | `""` | Optional className passthrough. | No |

## Variants

- Allowed `initialMode` values: `button`, `input` (default `button`).

## Invalid combinations

- MUST NOT: `value` and `defaultValue` set together. `value` makes the component controlled and `defaultValue` uncontrolled; pass one, not both.

## Keyboard

The contract records no keyboard interaction.

## Rules

Every item under When not to use is a MUST NOT. MUST and SHOULD follow RFC 2119.

| Level | Rule | How it is checked |
| --- | --- | --- |
| MUST NOT | `value` and `defaultValue` set together. `value` makes the component controlled and `defaultValue` uncontrolled; pass one, not both. | Checked by the MCP tool validate_component_usage. |
| MUST | Required stories produce no axe violations at the configured severity. | Automated by `npm run test:stories:matrix:ci`. WCAG 2.5.8. |
| MUST | The accessibility tree (role, name, state) matches the committed snapshot for every required story. | Automated by `npm run test:stories:matrix:ci`. WCAG 1.3.1, 4.1.2. |
| MUST | The component remains legible and operable under a real browser forced-colors: active pass. | Automated by `npm run test:stories:hc`. |
| MUST | A human completed an end-to-end accessibility review of this component. | Manual review, last on 2026-05-28. |
| MUST NOT | Maintainers: Do not bypass design tokens or skip forced-colors verification at beta. | Release review; not machine-checked. |

## Install and import

- In-repo only. TransformingActionInput is not exported from `@digitaltableteur/react`, so there is no public import path.

## Links

- Machine-readable contract (Design System Contract 1.0): https://www.digitaltableteur.com/contracts/v1/TransformingActionInput.contract.json
- Markdown version of this page: https://www.digitaltableteur.com/design-system/components/transforming-action-input.md
- Component index as JSON: https://www.digitaltableteur.com/design-system/components.json
- All components: https://www.digitaltableteur.com/design-system/components
- Source: The implementation lives in a private repository. This page, its Markdown twin and the contract are generated from it at build time and are the public source of truth.