InputControl: Improve type annotations and stories (#40119)

* Fix inaccuracy in readme for `value` prop

* Properly export `InputControl` component for TS extraction

* Fix placement of `FlexProps` type

`InputControl` itself does not accept `Flex` props. Only `InputBase` does.

* Add descriptions from readmes into types.ts

* Convert stories

* Convert stories to TS

* Update changelog

* Keep type unions inside types.ts

* Add description and default for `isFocus` prop

packages/components/CHANGELOG.md

@@ -9,6 +9,7 @@
 -   Update `BorderControl` and `BorderBoxControl` to allow the passing of custom class names to popovers ([#39753](https://github.com/WordPress/gutenberg/pull/39753)).
 -   `ToggleGroupControl`: Reintroduce backdrop animation ([#40021](https://github.com/WordPress/gutenberg/pull/40021)).
 -   `Card`: Adjust border radius effective size ([#40032](https://github.com/WordPress/gutenberg/pull/40032)).
+-   `InputControl`: Improved TypeScript type annotations ([#40119](https://github.com/WordPress/gutenberg/pull/40119)).
 
 ### Internal
 

packages/components/src/input-control/README.md

@@ -105,5 +105,5 @@ Type of the input element to render. Defaults to "text".
 
 The current value of the input.
 
--   Type: `String | Number`
--   Required: Yes
+-   Type: `String`
+-   Required: No

packages/components/src/input-control/index.tsx

@@ -25,7 +25,7 @@ function useUniqueId( idProp?: string ) {
 	return idProp || id;
 }
 
-export function InputControl(
+export function UnforwardedInputControl(
 	{
 		__unstableStateReducer: stateReducer = ( state ) => state,
 		__unstableInputWidth,
@@ -88,6 +88,25 @@ export function InputControl(
 	);
 }
 
-const ForwardedComponent = forwardRef( InputControl );
+/**
+ * InputControl components let users enter and edit text. This is an experimental component
+ * intended to (in time) merge with or replace `TextControl`.
+ *
+ * @example
+ * import { __experimentalInputControl as InputControl } from '@wordpress/components';
+ * import { useState } from '@wordpress/compose';
+ *
+ * const Example = () => {
+ *   const [ value, setValue ] = useState( '' );
+ *
+ *   return (
+ *  	<InputControl
+ *  		value={ value }
+ *  		onChange={ ( nextValue ) => setValue( nextValue ) }
+ *  	/>
+ *   );
+ * };
+ */
+export const InputControl = forwardRef( UnforwardedInputControl );
 
-export default ForwardedComponent;
+export default InputControl;

packages/components/src/input-control/stories/index.tsx

@@ -0,0 +1,63 @@
+/**
+ * External dependencies
+ */
+import type { ComponentMeta, ComponentStory } from '@storybook/react';
+
+/**
+ * Internal dependencies
+ */
+import InputControl from '..';
+
+const meta: ComponentMeta< typeof InputControl > = {
+	title: 'Components (Experimental)/InputControl',
+	component: InputControl,
+	argTypes: {
+		__unstableInputWidth: { control: { type: 'text' } },
+		__unstableStateReducer: { control: { type: null } },
+		onChange: { control: { type: null } },
+		prefix: { control: { type: null } },
+		suffix: { control: { type: null } },
+		type: { control: { type: 'text' } },
+	},
+	parameters: {
+		controls: { expanded: true },
+		docs: { source: { state: 'open' } },
+	},
+};
+export default meta;
+
+const Template: ComponentStory< typeof InputControl > = ( args ) => (
+	<InputControl { ...args } />
+);
+
+export const Default = Template.bind( {} );
+Default.args = {
+	label: 'Value',
+	placeholder: 'Placeholder',
+	value: '',
+};
+
+export const WithPrefix = Template.bind( {} );
+WithPrefix.args = {
+	...Default.args,
+	prefix: <span style={ { paddingLeft: 8 } }>@</span>,
+};
+
+export const WithSuffix = Template.bind( {} );
+WithSuffix.args = {
+	...Default.args,
+	suffix: <button style={ { marginRight: 4 } }>Send</button>,
+};
+
+export const WithSideLabel = Template.bind( {} );
+WithSideLabel.args = {
+	...Default.args,
+	labelPosition: 'side',
+};
+
+export const WithEdgeLabel = Template.bind( {} );
+WithEdgeLabel.args = {
+	...Default.args,
+	__unstableInputWidth: '20em',
+	labelPosition: 'edge',
+};

packages/components/src/input-control/types.ts

@@ -7,15 +7,16 @@ import type {
 	ChangeEvent,
 	SyntheticEvent,
 	PointerEvent,
+	HTMLInputTypeAttribute,
 } from 'react';
 import type { useDrag } from '@use-gesture/react';
 
 /**
  * Internal dependencies
  */
 import type { StateReducer } from './reducer/state';
-import type { FlexProps } from '../flex/types';
 import type { WordPressComponentProps } from '../ui/context';
+import type { FlexProps } from '../flex/types';
 
 export type LabelPosition = 'top' | 'bottom' | 'side' | 'edge';
 
@@ -27,9 +28,31 @@ export type Size = 'default' | 'small' | '__unstable-large';
 
 interface BaseProps {
 	__unstableInputWidth?: CSSProperties[ 'width' ];
+	/**
+	 * If true, the label will only be visible to screen readers.
+	 *
+	 * @default false
+	 */
 	hideLabelFromVision?: boolean;
+	/**
+	 * Whether the component should be in a focused state.
+	 * Used to coordinate focus states when the actual focused element and the component handling
+	 * visual focus are separate.
+	 *
+	 * @default false
+	 */
 	isFocused: boolean;
+	/**
+	 * The position of the label.
+	 *
+	 * @default 'top'
+	 */
 	labelPosition?: LabelPosition;
+	/**
+	 * Adjusts the size of the input.
+	 *
+	 * @default 'default'
+	 */
 	size?: Size;
 }
 
@@ -39,35 +62,83 @@ export type InputChangeCallback<
 > = ( nextValue: string | undefined, extra: { event: E } & P ) => void;
 
 export interface InputFieldProps extends BaseProps {
+	/**
+	 * Determines the drag axis.
+	 *
+	 * @default 'n'
+	 */
 	dragDirection?: DragDirection;
+	/**
+	 * If `isDragEnabled` is true, this controls the amount of `px` to have been dragged before
+	 * the drag gesture is actually triggered.
+	 *
+	 * @default 10
+	 */
 	dragThreshold?: number;
+	/**
+	 * If true, enables mouse drag gestures.
+	 *
+	 * @default false
+	 */
 	isDragEnabled?: boolean;
+	/**
+	 * If true, the `ENTER` key press is required in order to trigger an `onChange`.
+	 * If enabled, a change is also triggered when tabbing away (`onBlur`).
+	 *
+	 * @default false
+	 */
 	isPressEnterToChange?: boolean;
+	/**
+	 * A function that receives the value of the input.
+	 */
 	onChange?: InputChangeCallback;
 	onValidate?: (
 		nextValue: string,
 		event?: SyntheticEvent< HTMLInputElement >
 	) => void;
 	setIsFocused: ( isFocused: boolean ) => void;
 	stateReducer?: StateReducer;
+	/**
+	 * The current value of the input.
+	 */
 	value?: string;
 	onDragEnd?: ( dragProps: DragProps ) => void;
 	onDragStart?: ( dragProps: DragProps ) => void;
 	onDrag?: ( dragProps: DragProps ) => void;
+	/**
+	 * Type of the input element to render.
+	 *
+	 * @default 'text'
+	 */
+	type?: HTMLInputTypeAttribute;
 }
 
 export interface InputBaseProps extends BaseProps, FlexProps {
 	children: ReactNode;
+	/**
+	 * Renders an element on the left side of the input.
+	 */
 	prefix?: ReactNode;
+	/**
+	 * Renders an element on the right side of the input.
+	 */
 	suffix?: ReactNode;
+	/**
+	 * If true, the `input` will be disabled.
+	 *
+	 * @default false
+	 */
 	disabled?: boolean;
 	className?: string;
 	id?: string;
+	/**
+	 * If this property is added, a label will be generated using label property as the content.
+	 */
 	label?: ReactNode;
 }
 
 export interface InputControlProps
-	extends Omit< InputBaseProps, 'children' | 'isFocused' >,
+	extends Omit< InputBaseProps, 'children' | 'isFocused' | keyof FlexProps >,
 		/**
 		 * The `prefix` prop in `WordPressComponentProps< InputFieldProps, 'input', false >` comes from the
 		 * `HTMLInputAttributes` and clashes with the one from `InputBaseProps`. So we have to omit it from