[useRadioGroup] Convert to TypeScript (#29326)

packages/mui-material/src/RadioGroup/RadioGroupContext.ts

@@ -0,0 +1,18 @@
+import * as React from 'react';
+
+export interface RadioGroupContextValue {
+  name: string | undefined;
+  onChange: (event: React.ChangeEvent<HTMLInputElement>, value: string) => void;
+  value: any;
+}
+
+/**
+ * @ignore - internal component.
+ */
+const RadioGroupContext = React.createContext<RadioGroupContextValue | undefined>(undefined);
+
+if (process.env.NODE_ENV !== 'production') {
+  RadioGroupContext.displayName = 'RadioGroupContext';
+}
+
+export default RadioGroupContext;

packages/mui-material/src/RadioGroup/useRadioGroup.ts

@@ -0,0 +1,8 @@
+import * as React from 'react';
+import RadioGroupContext, { RadioGroupContextValue } from './RadioGroupContext';
+
+export interface RadioGroupState extends RadioGroupContextValue {}
+
+export default function useRadioGroup(): RadioGroupState | undefined {
+  return React.useContext(RadioGroupContext);
+}