# RadioGroup

Single selection from a list of options.

## Examples

### Default

```tsx
import { RadioGroup } from '@var-ui/react';

<RadioGroup
  label="Plan"
  options={[
    { value: 'free', label: 'Free' },
    { value: 'pro', label: 'Pro' },
  ]}
/>
```

```astro
---
// No @var-ui/astro RadioGroup — core recipe + native radios.
import { radio } from '@var-ui/core';

const r = radio();
const options = [
  { value: 'free', label: 'Free' },
  { value: 'pro', label: 'Pro' },
];
---

<div class:list={[r.group]} role="radiogroup" aria-labelledby="plan-label">
  <span class:list={[r.groupLabel]} id="plan-label">Plan</span>
  {options.map((option) => (
    <label class:list={[r.item]}>
      <input type="radio" name="plan" value={option.value} class="sr-only" />
      <span class:list={[r.control]}></span>
      <span class:list={[r.label]}>{option.label}</span>
    </label>
  ))}
</div>
```

```html
<div class="var-ui-radio__group" role="radiogroup" aria-labelledby="plan-label"><span class="var-ui-radio__groupLabel" id="plan-label">Plan</span><label class="var-ui-radio__item"><input type="radio" name="plan" value="free" style="position:absolute;width:1px;height:1px;opacity:0"></input><span class="var-ui-radio__control"></span><span class="var-ui-radio__label">Free</span></label><label class="var-ui-radio__item"><input type="radio" name="plan" value="pro" style="position:absolute;width:1px;height:1px;opacity:0"></input><span class="var-ui-radio__control"></span><span class="var-ui-radio__label">Pro</span></label></div>
```

## Props

| Name | Type | Required | Default | Description |
| --- | --- | --- | --- | --- |
| options | RadioGroupOption[] | yes |  | Options to render as radio buttons. |
| label | string \| undefined | no |  | Group label rendered above the option list. |
| aria-describedby | string \| undefined | no |  | Identifies the element (or elements) that describes the object. |
| aria-details | string \| undefined | no |  | Identifies the element (or elements) that provide a detailed, extended description for the object. |
| aria-errormessage | string \| undefined | no |  | Identifies the element that provides an error message for the object. |
| aria-label | string \| undefined | no |  | Defines a string value that labels the current element. |
| aria-labelledby | string \| undefined | no |  | Identifies the element (or elements) that labels the current element. |
| className | ClassNameOrFunction<RadioGroupRenderProps> \| undefined | no | 'react-aria-RadioGroup' | The CSS [className](https://developer.mozilla.org/en-US/docs/Web/API/Element/className) for the element. A function may be provided to compute the class based on component state. |
| defaultValue | string \| null \| undefined | no |  | The default value (uncontrolled). |
| dir | string \| undefined | no |  |  |
| form | string \| undefined | no |  | The `<form>` element to associate the input with. The value of this attribute must be the id of a `<form>` in the same document. See [MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/input#form). |
| hidden | boolean \| undefined | no |  |  |
| id | string \| undefined | no |  | The element's unique identifier. See [MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/id). |
| inert | boolean \| undefined | no |  |  |
| isDisabled | boolean \| undefined | no |  | Whether the input is disabled. |
| isInvalid | boolean \| undefined | no |  | Whether the input value is invalid. |
| isReadOnly | boolean \| undefined | no |  | Whether the input can be selected but not changed by the user. |
| isRequired | boolean \| undefined | no |  | Whether user input is required on the input before form submission. |
| lang | string \| undefined | no |  |  |
| name | string \| undefined | no |  | The name of the input element, used when submitting an HTML form. See [MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#htmlattrdefname). |
| onAnimationEnd | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAnimationEndCapture | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAnimationIteration | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAnimationIterationCapture | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAnimationStart | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAnimationStartCapture | AnimationEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAuxClick | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onAuxClickCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onBlur | ((e: FocusEvent<Element, Element>) => void) \| undefined | no |  | Handler that is called when the element loses focus. |
| onChange | ((value: string) => void) \| undefined | no |  | Handler that is called when the value changes. |
| onClick | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onClickCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onContextMenu | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onContextMenuCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onDoubleClick | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onDoubleClickCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onFocus | ((e: FocusEvent<Element, Element>) => void) \| undefined | no |  | Handler that is called when the element receives focus. |
| onFocusChange | ((isFocused: boolean) => void) \| undefined | no |  | Handler that is called when the element's focus status changes. |
| onGotPointerCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onGotPointerCaptureCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onLostPointerCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onLostPointerCaptureCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseDown | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseDownCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseEnter | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseLeave | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseMove | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseMoveCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseOut | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseOutCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseOver | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseOverCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseUp | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onMouseUpCapture | MouseEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerCancel | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerCancelCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerDown | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerDownCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerEnter | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerLeave | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerMove | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerMoveCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerOut | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerOutCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerOver | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerOverCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerUp | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onPointerUpCapture | PointerEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onScroll | UIEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onScrollCapture | UIEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchCancel | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchCancelCapture | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchEnd | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchEndCapture | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchMove | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchMoveCapture | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchStart | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTouchStartCapture | TouchEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionCancel | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionCancelCapture | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionEnd | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionEndCapture | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionRun | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionRunCapture | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionStart | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onTransitionStartCapture | TransitionEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onWheel | WheelEventHandler<HTMLDivElement> \| undefined | no |  |  |
| onWheelCapture | WheelEventHandler<HTMLDivElement> \| undefined | no |  |  |
| render | DOMRenderFunction<"div", RadioGroupRenderProps> \| undefined | no |  | Overrides the default DOM element with a custom render function. This allows rendering existing components with built-in styles and behaviors such as router links, animation libraries, and pre-styled components.  Requirements:  - You must render the expected element type (e.g. if `<button>` is expected, you cannot render an   `<a>`). - Only a single root DOM element can be rendered (no fragments). - You must pass through props and ref to the underlying DOM element, merging with your own prop   as appropriate. |
| slot | string \| null \| undefined | no |  | A slot name for the component. Slots allow the component to receive props from a parent component. An explicit `null` value indicates that the local props completely override all props received from a parent. |
| style | StyleOrFunction<RadioGroupRenderProps> \| undefined | no |  | The inline [style](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/style) for the element. A function may be provided to compute the style based on component state. |
| translate | "yes" \| "no" \| undefined | no |  |  |
| validate | ((value: string) => true \| ValidationError \| null \| undefined) \| undefined | no |  | A function that returns an error message if a given value is invalid. Validation errors are displayed to the user when the form is submitted if `validationBehavior="native"`. For realtime validation, use the `isInvalid` prop instead. |
| validationBehavior | "native" \| "aria" \| undefined | no | 'native' | Whether to use native HTML form validation to prevent form submission when the value is missing or invalid, or mark the field as required or invalid via ARIA. |
| value | string \| null \| undefined | no |  | The current value (controlled). |
| orientation | Orientation \| undefined | no | 'vertical' | The axis the Radio Button(s) should align with. |

## Accessibility

Built on React Aria Components where applicable.