Add tabBarStyle, close #4966 (#4970)

components/tabs/index.en-US.md

@@ -25,6 +25,7 @@ Ant Design has 3 types Tabs for different situation.
 | onChange     | Callback when tab is switched | Function | - |
 | onTabClick   | Callback when tab is clicked | Function | - |
 | tabBarExtraContent | Extra element in tab bar | React.ReactNode | - |
+| tabBarStyle  | tar bar style object           | object   | -        |
 | type         | Basic style of tabs. Options: line, card & editable-card | string | line |
 | size         | Tab bar size. Options: default, small. Only works while `type="line"`. | string | default |
 | tabPosition  | Position of tabs. Options: top, right, bottom & left | string | top |

components/tabs/index.tsx

@@ -19,6 +19,7 @@ export interface TabsProps {
   onChange?: (activeKey: string) => void;
   onTabClick?: Function;
   tabBarExtraContent?: React.ReactNode | null;
+  tabBarStyle?: React.CSSProperties;
   type?: TabsType;
   tabPosition?: TabsPosition;
   onEdit?: (targetKey: string, action: any) => void;
@@ -91,6 +92,7 @@ export default class Tabs extends React.Component<TabsProps, any> {
       tabPosition,
       children,
       tabBarExtraContent,
+      tabBarStyle,
       hideAdd,
       onTabClick,
       animated,
@@ -150,6 +152,7 @@ export default class Tabs extends React.Component<TabsProps, any> {
       <ScrollableInkTabBar
         extraContent={tabBarExtraContent}
         onTabClick={onTabClick}
+        style={tabBarStyle}
       />
     );
 

components/tabs/index.zh-CN.md

@@ -28,6 +28,7 @@ Ant Design 依次提供了三级选项卡，分别用于不同的场景。
 | onChange         | 切换面板的回调                               | Function | 无            |
 | onTabClick       | tab 被点击的回调                             | Function | 无            |
 | tabBarExtraContent | tab bar 上额外的元素                       | React.ReactNode | 无          |
+| tabBarStyle      | tar bar 的样式对象                           | object   | -             |
 | type | 页签的基本样式，可选 `line`、`card` `editable-card` 类型   | string   | 'line'      |
 | size | 大小，提供 `default` 和 `small` 两种大小，仅当 `type="line"` 时生效。  | string   | 'default'      |
 | tabPosition | 页签位置，可选值有 `top` `right` `bottom` `left`  | string   | 'top'      |