Add typings for EuiBadge (#1034)

* Add typings for EuiBadge.

* Add PR info to CHANGELOG.md

* Fix typo in changelog.

* Update EuiBadge SFC annotation based on PR feedback.

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## [`master`](https://github.com/elastic/eui/tree/master)
 
+- Added typings for 'EuiBadge' ([#1034](https://github.com/elastic/eui/pull/1034))
 - Added a visual pattern for Kibana's Global Date Picker ([#1026](https://github.com/elastic/eui/pull/1026))
 - Added `responsive` prop to `EuiFlexGrid` ([#1026](https://github.com/elastic/eui/pull/1026))
 - Added `expand` prop to `EuiTabs` and `EuiTabbedContent` ([#1026](https://github.com/elastic/eui/pull/1026))
@@ -13,7 +14,6 @@
 
 - To make it more accessible, added a random id to `EuiSwitch`'s id prop if none is passed.  ([#779](https://github.com/elastic/eui/pull/779))
 
-
 ## [`3.1.0`](https://github.com/elastic/eui/tree/v3.1.0)
 
 - Added `EuiMutationObserver` to expose Mutation Observer API to React components ([#966](https://github.com/elastic/eui/pull/966))

src/components/badge/index.d.ts

@@ -0,0 +1,23 @@
+/// <reference path="../icon/index.d.ts" />
+
+import { HTMLAttributes, MouseEventHandler } from 'react';
+
+declare module '@elastic/eui' {
+
+  type IconSide = 'left';
+
+  export interface EuiBadgeProps {
+    iconType?: IconType;
+    iconSide?: IconSide;
+    iconOnClick?: MouseEventHandler<HTMLButtonElement>;
+    iconOnClickAriaLabel?: string;
+    onClick?: MouseEventHandler<HTMLButtonElement>;
+    onClickAriaLabel?: string;
+    color?: string;
+    closeButtonProps?: Object;
+  }
+
+  export const EuiBadge: SFC<
+    CommonProps & HTMLAttributes<HTMLSpanElement> & HTMLAttributes<HTMLButtonElement> & EuiBadgeProps
+  >;
+}

src/components/index.d.ts

@@ -24,3 +24,4 @@
 /// <reference path="./empty_prompt/index.d.ts" />
 /// <reference path="./code/index.d.ts" />
 /// <reference path="./call_out/index.d.ts" />
+/// <reference path="./badge/index.d.ts" />