[EuiRadio] Make id required if label is present

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 **Bug Fixes**
 
+- Added need of `id` if `lable` is passed to issue in `EuiRadio` ([#3382](https://github.com/elastic/eui/pull/3382))
 - Fixed z-index issue in `EuiDatePicker` where it's popover would sit beneath other DOM siblings that had z-index applied ([#3376](https://github.com/elastic/eui/pull/3376))
 - Added `download` glyph to `EuiIcon` ([#3364](https://github.com/elastic/eui/pull/3364))
 - Applies `max-width: 100%` to `EuiPageBody` so inner flex-based items don't overflow their containers  ([#3375](https://github.com/elastic/eui/pull/3375))

src/components/form/radio/radio.tsx

@@ -24,26 +24,33 @@ import React, {
   ReactNode,
 } from 'react';
 import classNames from 'classnames';
-import { CommonProps } from '../../common';
+import { CommonProps, ExclusiveUnion } from '../../common';
 
 export interface RadioProps {
   autoFocus?: boolean;
   /**
    * When `true` creates a shorter height radio row
    */
   compressed?: boolean;
-  label?: ReactNode;
   name?: string;
   value?: string;
   checked?: boolean;
   disabled?: boolean;
   onChange: ChangeEventHandler<HTMLInputElement>;
 }
 
-export interface EuiRadioProps
-  extends CommonProps,
-    Omit<HTMLAttributes<HTMLDivElement>, 'onChange'>,
-    RadioProps {}
+interface idWithLable extends RadioProps {
+  label: ReactNode;
+  id: string;
+}
+
+interface withId extends RadioProps {
+  id: string;
+}
+
+export type EuiRadioProps = CommonProps &
+  Omit<HTMLAttributes<HTMLDivElement>, 'onChange'> &
+  ExclusiveUnion<ExclusiveUnion<RadioProps, idWithLable>, withId>;
 
 export const EuiRadio: FunctionComponent<EuiRadioProps> = ({
   className,

src/components/form/radio/radio_group.tsx

@@ -86,7 +86,7 @@ export const EuiRadioGroup: FunctionComponent<EuiRadioGroupProps> = ({
         disabled={disabled || isOptionDisabled}
         onChange={onChange.bind(null, option.id, option.value)}
         compressed={compressed}
-        {...optionRest}
+        {...optionRest as EuiRadioProps}
       />
     );
   });