[RadioGroup] Create new RadioGroup component

docs/data/base/components/radio-group/UnstyledRadioGroupIntroduction/system/index.js

@@ -0,0 +1,76 @@
+import * as React from 'react';
+import * as RadioGroup from '@base_ui/react/RadioGroup';
+import * as Radio from '@base_ui/react/Radio';
+import { styled } from '@mui/system';
+
+export default function UnstyledRadioGroupIntroduction() {
+  return (
+    <RadioGroup.Root name="root" style={{ display: 'flex', gap: 8 }}>
+      <RadioItem value="light">
+        <Indicator />
+        Light
+      </RadioItem>
+      <RadioItem value="medium">
+        <Indicator />
+        Medium
+      </RadioItem>
+      <RadioItem value="heavy">
+        <Indicator />
+        Heavy
+      </RadioItem>
+    </RadioGroup.Root>
+  );
+}
+
+const grey = {
+  100: '#E5EAF2',
+  200: '#D8E0E9',
+  300: '#CBD4E2',
+};
+
+const blue = {
+  400: '#3399FF',
+  600: '#0072E6',
+  800: '#004C99',
+};
+
+const RadioItem = styled(Radio.Root)`
+  display: flex;
+  align-items: center;
+  padding: 8px 16px;
+  border-radius: 4px;
+  border: none;
+  background-color: ${grey[100]};
+  color: black;
+  outline: none;
+  font-size: 16px;
+  cursor: default;
+
+  &:hover {
+    background-color: ${grey[100]};
+  }
+
+  &:focus-visible {
+    outline: 2px solid ${blue[400]};
+    outline-offset: 2px;
+  }
+
+  &[data-radio='checked'] {
+    background-color: ${blue[600]};
+    color: white;
+  }
+`;
+
+const Indicator = styled(Radio.Indicator)`
+  border-radius: 50%;
+  width: 8px;
+  height: 8px;
+  margin-right: 8px;
+  outline: 1px solid black;
+
+  &[data-radio='checked'] {
+    background-color: white;
+    border: none;
+    outline: none;
+  }
+`;

docs/data/base/components/radio-group/UnstyledRadioGroupIntroduction/system/index.tsx

@@ -0,0 +1,76 @@
+import * as React from 'react';
+import * as RadioGroup from '@base_ui/react/RadioGroup';
+import * as Radio from '@base_ui/react/Radio';
+import { styled } from '@mui/system';
+
+export default function UnstyledRadioGroupIntroduction() {
+  return (
+    <RadioGroup.Root name="root" style={{ display: 'flex', gap: 8 }}>
+      <RadioItem value="light">
+        <Indicator />
+        Light
+      </RadioItem>
+      <RadioItem value="medium">
+        <Indicator />
+        Medium
+      </RadioItem>
+      <RadioItem value="heavy">
+        <Indicator />
+        Heavy
+      </RadioItem>
+    </RadioGroup.Root>
+  );
+}
+
+const grey = {
+  100: '#E5EAF2',
+  200: '#D8E0E9',
+  300: '#CBD4E2',
+};
+
+const blue = {
+  400: '#3399FF',
+  600: '#0072E6',
+  800: '#004C99',
+};
+
+const RadioItem = styled(Radio.Root)`
+  display: flex;
+  align-items: center;
+  padding: 8px 16px;
+  border-radius: 4px;
+  border: none;
+  background-color: ${grey[100]};
+  color: black;
+  outline: none;
+  font-size: 16px;
+  cursor: default;
+
+  &:hover {
+    background-color: ${grey[100]};
+  }
+
+  &:focus-visible {
+    outline: 2px solid ${blue[400]};
+    outline-offset: 2px;
+  }
+
+  &[data-radio='checked'] {
+    background-color: ${blue[600]};
+    color: white;
+  }
+`;
+
+const Indicator = styled(Radio.Indicator)`
+  border-radius: 50%;
+  width: 8px;
+  height: 8px;
+  margin-right: 8px;
+  outline: 1px solid black;
+
+  &[data-radio='checked'] {
+    background-color: white;
+    border: none;
+    outline: none;
+  }
+`;

docs/data/base/components/radio-group/UnstyledRadioGroupIntroduction/system/index.tsx.preview

@@ -0,0 +1,14 @@
+<RadioGroup.Root name="root" style={{ display: 'flex', gap: 8 }}>
+  <RadioItem value="light">
+    <Indicator />
+    Light
+  </RadioItem>
+  <RadioItem value="medium">
+    <Indicator />
+    Medium
+  </RadioItem>
+  <RadioItem value="heavy">
+    <Indicator />
+    Heavy
+  </RadioItem>
+</RadioGroup.Root>

docs/data/base/components/radio-group/radio-group.md

@@ -0,0 +1,135 @@
+---
+productId: base-ui
+title: React Radio Group component
+components: RadioGroupRoot, RadioRoot, RadioIndicator
+githubLabel: 'component: radio'
+waiAria: https://www.w3.org/WAI/ARIA/apg/patterns/radio/
+---
+
+# Radio Group
+
+<p class="description">Radio Groups contain a set of checkable buttons where only one of the buttons can be checked at a time.</p>
+
+{{"component": "@mui/docs/ComponentLinkHeader", "design": false}}
+
+{{"component": "modules/components/ComponentPageTabs.js"}}
+
+## Introduction
+
+{{"demo": "UnstyledRadioGroupIntroduction", "defaultCodeOpen": false, "bg": "gradient"}}
+
+## Installation
+
+Base UI components are all available as a single package.
+
+<codeblock storageKey="package-manager">
+
+```bash npm
+npm install @base_ui/react
+```
+
+```bash yarn
+yarn add @base_ui/react
+```
+
+```bash pnpm
+pnpm add @base_ui/react
+```
+
+</codeblock>
+
+Once you have the package installed, import the components.
+
+```ts
+import * as RadioGroup from '@base_ui/react/RadioGroup';
+import * as Radio from '@base_ui/react/Radio';
+```
+
+## Anatomy
+
+Radio Group is composed of a `Root` and `Radio` components:
+
+- `<RadioGroup.Root />` is a top-level element that wraps the other components.
+- `<Radio.Root />` renders an individual `<button>` radio item.
+- `<Radio.Indicator />` renders a `<span>` for providing a visual indicator. You can style this itself and/or place an icon inside.
+
+```jsx
+<RadioGroup.Root>
+  <Radio.Root>
+    <Radio.Indicator />
+  </Radio.Root>
+</RadioGroup.Root>
+```
+
+## Identifying items
+
+The `value` prop is required on `Radio.Root` to identify it in the Radio Group:
+
+```jsx
+<RadioGroup.Root>
+  <Radio.Root value="a">
+    <Radio.Indicator />
+  </Radio.Root>
+  <Radio.Root value="b">
+    <Radio.Indicator />
+  </Radio.Root>
+</RadioGroup.Root>
+```
+
+## Default value
+
+The `defaultValue` prop determines the initial value of the component when uncontrolled, linked to the `value` prop on an individual Radio item:
+
+```jsx
+<RadioGroup.Root defaultValue="a">
+  <Radio.Root value="a" />
+  <Radio.Root value="b" />
+</RadioGroup.Root>
+```
+
+## Controlled
+
+The `value` and `onValueChange` props contain the `value` string of the currently selected Radio item in the Radio Group:
+
+```jsx
+const [value, setValue] = React.useState('a');
+
+return (
+  <RadioGroup.Root value={value} onValueChange={setValue}>
+    <Radio.Root value="a" />
+    <Radio.Root value="b" />
+  </RadioGroup.Root>
+);
+```
+
+## Styling
+
+The `Radio` components have a `[data-radio]` attribute with values `"checked"` or `"unchecked"` to style based on the checked state:
+
+```jsx
+<Radio.Root className="Radio">
+  <Radio.Indicator className="RadioIndicator" />
+</Radio.Root>
+```
+
+```css
+.Radio {
+  border: 1px solid black;
+}
+
+.RadioIndicator {
+  width: 20px;
+  height: 20px;
+  border-radius: 50%;
+  border: 1px solid black;
+}
+
+.Radio[data-radio='checked'] {
+  background: black;
+  color: white;
+}
+
+.RadioIndicator[data-radio='checked'] {
+  background: white;
+}
+```

docs/data/base/pages.ts

@@ -24,7 +24,7 @@ const pages: readonly MuiPage[] = [
           // { pathname: '/base-ui/react-autocomplete', title: 'Autocomplete' },
           { pathname: '/base-ui/react-checkbox', title: 'Checkbox' },
           { pathname: '/base-ui/react-number-field', title: 'Number Field' },
-          // { pathname: '/base-ui/react-radio-group', title: 'Radio Group', planned: true },
+          { pathname: '/base-ui/react-radio-group', title: 'Radio Group' },
           // { pathname: '/base-ui/react-select', title: 'Select' },
           { pathname: '/base-ui/react-slider', title: 'Slider' },
           { pathname: '/base-ui/react-switch', title: 'Switch' },

docs/data/base/pagesApi.js

@@ -229,6 +229,18 @@ module.exports = [
     pathname: '/base-ui/react-progress/components-api/#progress-track',
     title: 'ProgressTrack',
   },
+  {
+    pathname: '/base-ui/react-radio-group/components-api/#radio-group-root',
+    title: 'RadioGroupRoot',
+  },
+  {
+    pathname: '/base-ui/react-radio-group/components-api/#radio-indicator',
+    title: 'RadioIndicator',
+  },
+  {
+    pathname: '/base-ui/react-radio-group/components-api/#radio-root',
+    title: 'RadioRoot',
+  },
   { pathname: '/base-ui/react-select/components-api/#select', title: 'Select' },
   {
     pathname: '/base-ui/react-slider/components-api/#slider-control',

docs/pages/base-ui/api/radio-group-root.json

@@ -0,0 +1,26 @@
+{
+  "props": {
+    "className": { "type": { "name": "union", "description": "func<br>&#124;&nbsp;string" } },
+    "defaultValue": { "type": { "name": "union", "description": "number<br>&#124;&nbsp;string" } },
+    "disabled": { "type": { "name": "bool" }, "default": "false" },
+    "name": { "type": { "name": "string" } },
+    "onValueChange": { "type": { "name": "func" } },
+    "readOnly": { "type": { "name": "bool" }, "default": "false" },
+    "render": { "type": { "name": "union", "description": "element<br>&#124;&nbsp;func" } },
+    "required": { "type": { "name": "bool" }, "default": "false" },
+    "value": { "type": { "name": "union", "description": "number<br>&#124;&nbsp;string" } }
+  },
+  "name": "RadioGroupRoot",
+  "imports": [
+    "import * as RadioGroup from '@base_ui/react/RadioGroup';\nconst RadioGroupRoot = RadioGroup.Root;"
+  ],
+  "classes": [],
+  "spread": true,
+  "themeDefaultProps": true,
+  "muiName": "RadioGroupRoot",
+  "forwardsRefTo": "HTMLDivElement",
+  "filename": "/packages/mui-base/src/RadioGroup/Root/RadioGroupRoot.tsx",
+  "inheritance": null,
+  "demos": "<ul><li><a href=\"/base-ui/react-radio-group/\">Radio Group</a></li></ul>",
+  "cssComponent": false
+}

docs/pages/base-ui/api/radio-indicator.json

@@ -0,0 +1,19 @@
+{
+  "props": {
+    "className": { "type": { "name": "union", "description": "func<br>&#124;&nbsp;string" } },
+    "render": { "type": { "name": "union", "description": "element<br>&#124;&nbsp;func" } }
+  },
+  "name": "RadioIndicator",
+  "imports": [
+    "import * as Radio from '@base_ui/react/Radio';\nconst RadioIndicator = Radio.Indicator;"
+  ],
+  "classes": [],
+  "spread": true,
+  "themeDefaultProps": true,
+  "muiName": "RadioIndicator",
+  "forwardsRefTo": "HTMLSpanElement",
+  "filename": "/packages/mui-base/src/Radio/Indicator/RadioIndicator.tsx",
+  "inheritance": null,
+  "demos": "<ul><li><a href=\"/base-ui/react-radio-group/\">Radio Group</a></li></ul>",
+  "cssComponent": false
+}