diff --git a/components/_util/splitObject.tsx b/components/_util/splitObject.tsx
deleted file mode 100644
index 03b908936f..0000000000
--- a/components/_util/splitObject.tsx
+++ /dev/null
@@ -1,12 +0,0 @@
-export default function splitObject(obj, parts): Array<any> {
-  const left = {};
-  const right = {};
-  Object.keys(obj).forEach((k) => {
-    if (parts.indexOf(k) !== -1) {
-      left[k] = obj[k];
-    } else {
-      right[k] = obj[k];
-    }
-  });
-  return [left, right];
-}
diff --git a/components/badge/ScrollNumber.tsx b/components/badge/ScrollNumber.tsx
index 768dc27a48..df1485bf96 100644
--- a/components/badge/ScrollNumber.tsx
+++ b/components/badge/ScrollNumber.tsx
@@ -20,7 +20,7 @@ export interface ScrollNumberProps {
   component?: string;
   onAnimated?: Function;
   height?: number;
-  style: React.CSSProperties;
+  style?: React.CSSProperties;
 }
 
 export default class ScrollNumber extends Component<ScrollNumberProps, any> {
diff --git a/components/badge/index.tsx b/components/badge/index.tsx
index 57ef4f5f2f..1e25182eb3 100644
--- a/components/badge/index.tsx
+++ b/components/badge/index.tsx
@@ -3,7 +3,6 @@ import Animate from 'rc-animate';
 import ScrollNumber from './ScrollNumber';
 import classNames from 'classnames';
 import warning from '../_util/warning';
-import splitObject from '../_util/splitObject';
 
 export interface BadgeProps {
   /** Number to show in badge */
@@ -37,23 +36,16 @@ export default class Badge extends React.Component<BadgeProps, any> {
   };
 
   render() {
-    let [{
-      count, prefixCls, overflowCount, className, style, children, dot, status, text,
-    }, restProps] = splitObject(
-      this.props,
-      ['count', 'prefixCls', 'overflowCount', 'className', 'style', 'children', 'dot', 'status', 'text']
-    );
+    const { count, prefixCls, overflowCount, className, style, children, dot, status, text, ...restProps } = this.props;
     const isDot = dot || status;
-    const realCount = count;
-    count = count > overflowCount ? `${overflowCount}+` : count;
-
+    let displayCount = count > overflowCount ? `${overflowCount}+` : count;
     // dot mode don't need count
     if (isDot) {
-      count = '';
+      displayCount = '';
     }
 
     // null undefined "" "0" 0
-    const hidden = (!count || count === '0') && !isDot;
+    const hidden = (!displayCount || displayCount === '0') && !isDot;
     const scrollNumberCls = classNames({
       [`${prefixCls}-dot`]: isDot,
       [`${prefixCls}-count`]: !isDot,
@@ -85,7 +77,7 @@ export default class Badge extends React.Component<BadgeProps, any> {
       <ScrollNumber
         data-show={!hidden}
         className={scrollNumberCls}
-        count={count}
+        count={displayCount}
         style={style}
       />
     );
@@ -95,7 +87,7 @@ export default class Badge extends React.Component<BadgeProps, any> {
     );
 
     return (
-      <span {...restProps} className={badgeCls} title={realCount}>
+      <span {...restProps} className={badgeCls} title={count as string}>
         {children}
         <Animate
           component=""
diff --git a/components/breadcrumb/BreadcrumbItem.tsx b/components/breadcrumb/BreadcrumbItem.tsx
index 64864c1203..02b4c4f0df 100644
--- a/components/breadcrumb/BreadcrumbItem.tsx
+++ b/components/breadcrumb/BreadcrumbItem.tsx
@@ -1,7 +1,8 @@
 import React from 'react';
-import splitObject from '../_util/splitObject';
+import { PropTypes } from 'react';
 
 export interface BreadcrumbItemProps {
+  prefixCls?: string;
   separator?: React.ReactNode;
   href?: string;
 }
@@ -13,18 +14,16 @@ export default class BreadcrumbItem extends React.Component<BreadcrumbItemProps,
   };
 
   static propTypes = {
-    prefixCls: React.PropTypes.string,
-    separator: React.PropTypes.oneOfType([
-      React.PropTypes.string,
-      React.PropTypes.element,
+    prefixCls: PropTypes.string,
+    separator: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.element,
     ]),
-    href: React.PropTypes.string,
+    href: PropTypes.string,
   };
 
   render() {
-    const [{ prefixCls, separator, children }, restProps] = splitObject(
-      this.props, ['prefixCls', 'separator', 'children']
-    );
+    const { prefixCls, separator, children, ...restProps } = this.props;
     let link;
     if ('href' in this.props) {
       link = <a className={`${prefixCls}-link`} {...restProps}>{children}</a>;
diff --git a/components/button/button-group.tsx b/components/button/button-group.tsx
index a5d873c8bc..2340562d55 100644
--- a/components/button/button-group.tsx
+++ b/components/button/button-group.tsx
@@ -1,6 +1,5 @@
 import React from 'react';
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 
 export type ButtonSize = 'small' | 'large'
 
@@ -12,8 +11,7 @@ export interface ButtonGroupProps {
 }
 
 export default function ButtonGroup(props: ButtonGroupProps) {
-  const [{ prefixCls = 'ant-btn-group', size, className }, others] =
-    splitObject(props, ['prefixCls', 'size', 'className']);
+  const { prefixCls = 'ant-btn-group', size = '', className, ...others } = props;
 
   // large => lg
   // small => sm
diff --git a/components/button/button.tsx b/components/button/button.tsx
index 27a39e8e8e..4fee0ca22d 100644
--- a/components/button/button.tsx
+++ b/components/button/button.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 import classNames from 'classnames';
 import { findDOMNode } from 'react-dom';
 import Icon from '../icon';
-import splitObject from '../_util/splitObject';
+
 const rxTwoCNChar = /^[\u4e00-\u9fa5]{2}$/;
 const isTwoCNChar = rxTwoCNChar.test.bind(rxTwoCNChar);
 function isString(str) {
@@ -102,8 +102,7 @@ export default class Button extends React.Component<ButtonProps, any> {
 
   render() {
     const props = this.props;
-    const [{ type, shape, size, className, htmlType, children, icon, loading, prefixCls }, others] = splitObject(props,
-      ['type', 'shape', 'size', 'className', 'htmlType', 'children', 'icon', 'loading', 'prefixCls']);
+    const { type, shape, size = '', className, htmlType, children, icon, loading, prefixCls, ...others } = props;
 
     // large => lg
     // small => sm
diff --git a/components/card/index.tsx b/components/card/index.tsx
index be438a980c..a8b3a187cb 100644
--- a/components/card/index.tsx
+++ b/components/card/index.tsx
@@ -1,8 +1,8 @@
 import React from 'react';
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 
 export interface CardProps {
+  prefixCls?: string;
   title?: React.ReactNode;
   extra?: React.ReactNode;
   bordered?: boolean;
@@ -15,11 +15,10 @@ export interface CardProps {
 }
 
 export default (props: CardProps) => {
-  const [{
+  const {
     prefixCls = 'ant-card', className, extra, bodyStyle,
-    title, loading, bordered = true,
-  }, others] = splitObject(props,
-    ['prefixCls', 'className', 'children', 'extra', 'bodyStyle', 'title', 'loading', 'bordered']);
+    title, loading, bordered = true, ...others,
+  } = props;
   let children = props.children;
   const classString = classNames(prefixCls, className, {
     [`${prefixCls}-loading`]: loading,
diff --git a/components/cascader/index.tsx b/components/cascader/index.tsx
index 120afb6fff..fcc0a83205 100644
--- a/components/cascader/index.tsx
+++ b/components/cascader/index.tsx
@@ -5,7 +5,6 @@ import classNames from 'classnames';
 import omit from 'omit.js';
 import Input from '../input';
 import Icon from '../icon';
-import splitObject from '../_util/splitObject';
 
 export interface CascaderOptionType {
   value: string;
@@ -101,7 +100,6 @@ export default class Cascader extends React.Component<CascaderProps, any> {
     options: [],
     disabled: false,
     allowClear: true,
-    showSearch: false,
     notFoundContent: 'Not Found',
   };
 
@@ -247,10 +245,10 @@ export default class Cascader extends React.Component<CascaderProps, any> {
 
   render() {
     const { props, state } = this;
-    const [{ prefixCls, inputPrefixCls, children, placeholder, size, disabled,
-      className, style, allowClear, showSearch }, otherProps] = splitObject(props,
-      ['prefixCls', 'inputPrefixCls', 'children', 'placeholder', 'size', 'disabled',
-        'className', 'style', 'allowClear', 'showSearch']);
+    const {
+      prefixCls, inputPrefixCls, children, placeholder, size, disabled,
+      className, style, allowClear, showSearch = false, ...otherProps,
+    } = props;
     const value = state.value;
 
     const sizeCls = classNames({
@@ -311,7 +309,7 @@ export default class Cascader extends React.Component<CascaderProps, any> {
       dropdownMenuColumnStyle.height = 'auto'; // Height of one row.
     }
     // The default value of `matchInputWidth` is `true`
-    const resultListMatchInputWidth = showSearch.matchInputWidth === false ? false : true;
+    const resultListMatchInputWidth = (showSearch as ShowSearchType).matchInputWidth === false ? false : true;
     if (resultListMatchInputWidth && state.inputValue && this.refs.input) {
       dropdownMenuColumnStyle.width = this.refs.input.refs.input.offsetWidth;
     }
@@ -324,7 +322,7 @@ export default class Cascader extends React.Component<CascaderProps, any> {
         <Input
           {...inputProps}
           ref="input"
-          placeholder={value && value.length > 0 ? null : placeholder}
+          placeholder={value && value.length > 0 ? undefined : placeholder}
           className={`${prefixCls}-input ${sizeCls}`}
           value={state.inputValue}
           disabled={disabled}
diff --git a/components/checkbox/index.tsx b/components/checkbox/index.tsx
index 69703a694e..4e70217544 100644
--- a/components/checkbox/index.tsx
+++ b/components/checkbox/index.tsx
@@ -3,9 +3,9 @@ import React from 'react';
 import CheckboxGroup from './Group';
 import classNames from 'classnames';
 import PureRenderMixin from 'rc-util/lib/PureRenderMixin';
-import splitObject from '../_util/splitObject';
 
 export interface CheckboxProps {
+  prefixCls?: string;
   /** 指定当前是否选中 */
   checked?: boolean;
   /** 初始是否选中 */
@@ -14,6 +14,8 @@ export interface CheckboxProps {
   indeterminate?: boolean;
   /** 变化时回调函数 */
   onChange?: React.FormEventHandler<any>;
+  onMouseEnter?: React.MouseEventHandler<any>;
+  onMouseLeave?: React.MouseEventHandler<any>;
   style?: React.CSSProperties;
   disabled?: boolean;
   className?: string;
@@ -29,11 +31,10 @@ export default class Checkbox extends React.Component<CheckboxProps, any> {
     return PureRenderMixin.shouldComponentUpdate.apply(this, args);
   }
   render() {
-    const [{ prefixCls, style, children, className, indeterminate, onMouseEnter,
-      onMouseLeave }, restProps] = splitObject(
-      this.props, ['prefixCls', 'style', 'children', 'className', 'indeterminate',
-      'onMouseEnter', 'onMouseLeave']
-    );
+    const {
+      prefixCls, style, children, className, indeterminate,
+      onMouseEnter, onMouseLeave, ...restProps,
+     } = this.props;
     const classString = classNames(className, {
       [`${prefixCls}-wrapper`]: true,
     });
diff --git a/components/dropdown/dropdown-button.tsx b/components/dropdown/dropdown-button.tsx
index 896ee2b540..669d0255c6 100644
--- a/components/dropdown/dropdown-button.tsx
+++ b/components/dropdown/dropdown-button.tsx
@@ -4,19 +4,20 @@ import Icon from '../icon';
 import Dropdown from './dropdown';
 const ButtonGroup = Button.Group;
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 
 export interface DropdownButtonProps {
-  type?: 'primary' | 'ghost' | 'dash';
-  onClick?: React.FormEventHandler<any>;
-  trigger?: 'click' | 'hover';
+  prefixCls?: string;
+  className?: string;
+  type?: 'primary' | 'ghost' | 'dashed';
+  onClick?: React.MouseEventHandler<any>;
+  trigger?: ('click' | 'hover')[];
+  align?: any;
   overlay: React.ReactNode;
   visible?: boolean;
   disabled?: boolean;
   onVisibleChange?: (visible: boolean) => void;
   style?: React.CSSProperties;
-  prefixCls?: string;
-  children: any;
+  children?: any;
 }
 
 export default class DropdownButton extends React.Component<DropdownButtonProps, any> {
@@ -35,10 +36,10 @@ export default class DropdownButton extends React.Component<DropdownButtonProps,
   };
 
   render() {
-    const [{ type, overlay, trigger, align, children, className, onClick, prefixCls,
-      disabled, visible, onVisibleChange }, restProps] = splitObject(this.props,
-       ['type', 'overlay', 'trigger', 'align', 'children', 'className', 'onClick',
-         'prefixCls', 'disabled', 'visible', 'onVisibleChange']);
+    const {
+      type, overlay, trigger, align, children, className, onClick, prefixCls,
+      disabled, visible, onVisibleChange, ...restProps,
+    } = this.props;
     const cls = classNames(prefixCls, className);
 
     const dropdownProps = {
diff --git a/components/dropdown/dropdown.tsx b/components/dropdown/dropdown.tsx
index 3fca0f60f5..43c8baa9c6 100644
--- a/components/dropdown/dropdown.tsx
+++ b/components/dropdown/dropdown.tsx
@@ -3,7 +3,7 @@ import RcDropdown from 'rc-dropdown';
 import classNames from 'classnames';
 
 export interface DropDownProps {
-  trigger?: Array<'click' | 'hover'>;
+  trigger?: ('click' | 'hover')[];
   overlay: React.ReactNode;
   style?: React.CSSProperties;
   onVisibleChange?: (visible?: boolean) => void;
diff --git a/components/grid/col.tsx b/components/grid/col.tsx
index 9581609c35..c5585b45fb 100644
--- a/components/grid/col.tsx
+++ b/components/grid/col.tsx
@@ -2,7 +2,6 @@ import React from 'react';
 import { PropTypes } from 'react';
 import classNames from 'classnames';
 import assign from 'object-assign';
-import splitObject from '../_util/splitObject';
 
 const stringOrNumber = PropTypes.oneOfType([PropTypes.string, PropTypes.number]);
 const objectOrNumber = PropTypes.oneOfType([PropTypes.object, PropTypes.number]);
@@ -47,8 +46,7 @@ export default class Col extends React.Component<ColProps, any> {
 
   render() {
     const props = this.props;
-    const [{ span, order, offset, push, pull, className, children, prefixCls = 'ant-col' }, others] = splitObject(props,
-      ['span', 'order', 'offset', 'push', 'pull', 'className', 'children', 'prefixCls']);
+    const { span, order, offset, push, pull, className, children, prefixCls = 'ant-col', ...others } = props;
     let sizeClassObj = {};
     ['xs', 'sm', 'md', 'lg'].forEach(size => {
       let sizeProps: ColSize = {};
diff --git a/components/grid/row.tsx b/components/grid/row.tsx
index 3991f6c83f..dbf5cdaced 100644
--- a/components/grid/row.tsx
+++ b/components/grid/row.tsx
@@ -2,7 +2,6 @@ import React from 'react';
 import { Children, cloneElement } from 'react';
 import classNames from 'classnames';
 import assign from 'object-assign';
-import splitObject from '../_util/splitObject';
 
 export interface RowProps {
   className?: string;
@@ -17,7 +16,6 @@ export interface RowProps {
 export default class Row extends React.Component<RowProps, any> {
   static defaultProps = {
     gutter: 0,
-    prefixCls: 'ant-row',
   };
   static propTypes = {
     type: React.PropTypes.string,
@@ -29,8 +27,7 @@ export default class Row extends React.Component<RowProps, any> {
     prefixCls: React.PropTypes.string,
   };
   render() {
-    const [{ type, justify, align, className, gutter, style, children, prefixCls }, others] = splitObject(this.props,
-      ['type', 'justify', 'align', 'className', 'gutter', 'style', 'children', 'prefixCls']);
+    const { type, justify, align, className, gutter, style, children, prefixCls = 'ant-row', ...others } = this.props;
     const classes = classNames({
       [prefixCls]: !type,
       [`${prefixCls}-${type}`]: type,
diff --git a/components/input-number/index.tsx b/components/input-number/index.tsx
index 1cdac4cccd..72adeeb57d 100644
--- a/components/input-number/index.tsx
+++ b/components/input-number/index.tsx
@@ -1,7 +1,6 @@
 import React from 'react';
 import classNames from 'classnames';
 import RcInputNumber from 'rc-input-number';
-import splitObject from '../_util/splitObject';
 
 export interface InputNumberProps {
   prefixCls?: string;
@@ -25,8 +24,7 @@ export default class InputNumber extends React.Component<InputNumberProps, any>
   };
 
   render() {
-    const [{ className, size }, others] = splitObject(this.props,
-      ['size', 'className']);
+    const { className, size, ...others } = this.props;
     const inputNumberClass = classNames({
       [`${this.props.prefixCls}-lg`]: size === 'large',
       [`${this.props.prefixCls}-sm`]: size === 'small',
diff --git a/components/input/Search.tsx b/components/input/Search.tsx
index f6a787e3ef..a716c6e995 100644
--- a/components/input/Search.tsx
+++ b/components/input/Search.tsx
@@ -2,7 +2,6 @@ import React from 'react';
 import classNames from 'classnames';
 import Input from './Input';
 import Icon from '../icon';
-import splitObject from '../_util/splitObject';
 
 export interface SearchProps {
   className?: string;
@@ -32,9 +31,7 @@ export default class Search extends React.Component<SearchProps, any> {
     this.input.refs.input.focus();
   }
   render() {
-    const [{ className, prefixCls, style }, others] = splitObject(
-      this.props, ['className', 'prefixCls', 'style']
-    );
+    const { className, prefixCls, style, ...others } = this.props;
     delete others.onSearch;
     const wrapperCls = classNames({
       [`${prefixCls}-wrapper`]: true,
diff --git a/components/popconfirm/index.tsx b/components/popconfirm/index.tsx
index 2fa6d1501f..70abd60311 100644
--- a/components/popconfirm/index.tsx
+++ b/components/popconfirm/index.tsx
@@ -3,7 +3,6 @@ import Tooltip from '../tooltip';
 import { AbstractTooltipProps } from '../tooltip';
 import Icon from '../icon';
 import Button from '../button';
-import splitObject from '../_util/splitObject';
 
 export interface PopconfirmProps extends AbstractTooltipProps {
   title: React.ReactNode;
@@ -83,8 +82,7 @@ export default class Popconfirm extends React.Component<PopconfirmProps, any> {
 
   render() {
     const { props, context } = this;
-    const [{ prefixCls, title, placement }, restProps] =
-      splitObject(props, ['prefixCls', 'title', 'placement']);
+    const { prefixCls, title, placement, ...restProps } = props;
 
     let { okText, cancelText } = props;
     const popconfirmLocale = context.antLocale && context.antLocale.Popconfirm;
diff --git a/components/progress/progress.tsx b/components/progress/progress.tsx
index 72664fddd2..fd68dadcf0 100644
--- a/components/progress/progress.tsx
+++ b/components/progress/progress.tsx
@@ -3,7 +3,6 @@ import React from 'react';
 import Icon from '../icon';
 import { Circle } from 'rc-progress';
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 const statusColorMap = {
   normal: '#108ee9',
   exception: '#ff5500',
@@ -11,12 +10,15 @@ const statusColorMap = {
 };
 
 export interface ProgressProps {
+  prefixCls?: string;
+  className?: string;
   type?: 'line' | 'circle';
   percent?: number;
   format?: (percent: number) => string;
   status?: 'success' | 'active' | 'exception';
   showInfo?: boolean;
   strokeWidth?: number;
+  trailColor?: string;
   width?: number;
   style?: React.CSSProperties;
 }
@@ -45,14 +47,13 @@ export default class Progress extends React.Component<ProgressProps, any> {
   };
 
   render() {
-    const [{
-      prefixCls, status, format, percent, trailColor,
-      type, strokeWidth, width, className, showInfo,
-    }, restProps] = splitObject(this.props,
-      ['prefixCls', 'status', 'format', 'percent', 'trailColor', 'type', 'strokeWidth', 'width',
-        'className', 'showInfo']);
-    const progressStatus = (parseInt(percent, 10) >= 100 && !('status' in this.props))
-      ? 'success' : (status || 'normal');
+    const props = this.props;
+    const {
+      prefixCls, className, percent = 0, status, format, trailColor,
+      type, strokeWidth, width, showInfo, ...restProps,
+    } = props;
+    const progressStatus = parseInt(percent.toString(), 10) >= 100 && !('status' in props) ?
+      'success' : (status || 'normal');
     let progressInfo;
     let progress;
     const textFormatter = format || (percentNumber => `${percentNumber}%`);
diff --git a/components/spin/index.tsx b/components/spin/index.tsx
index 35d5cec908..4343f1170f 100644
--- a/components/spin/index.tsx
+++ b/components/spin/index.tsx
@@ -4,7 +4,6 @@ import { findDOMNode } from 'react-dom';
 import classNames from 'classnames';
 import Animate from 'rc-animate';
 import isCssAnimationSupported from '../_util/isCssAnimationSupported';
-import splitObject from '../_util/splitObject';
 import omit from 'omit.js';
 
 export interface SpinProps {
@@ -69,17 +68,14 @@ export default class Spin extends React.Component<SpinProps, any> {
     }
   }
   render() {
-    const [{
-      className, size, prefixCls, tip,
-    }, restProps] = splitObject(this.props,
-      ['className', 'size', 'prefixCls', 'tip']);
+    const { className, size, prefixCls, tip, ...restProps } = this.props;
     const { spinning } = this.state;
 
     const spinClassName = classNames(prefixCls, {
       [`${prefixCls}-sm`]: size === 'small',
       [`${prefixCls}-lg`]: size === 'large',
       [`${prefixCls}-spinning`]: spinning,
-      [`${prefixCls}-show-text`]: !!this.props.tip,
+      [`${prefixCls}-show-text`]: !!tip,
     }, className);
 
     // fix https://fb.me/react-unknown-prop
diff --git a/components/table/Table.tsx b/components/table/Table.tsx
index d9285a3760..c055724b3f 100755
--- a/components/table/Table.tsx
+++ b/components/table/Table.tsx
@@ -7,7 +7,6 @@ import Spin from '../spin';
 import classNames from 'classnames';
 import { flatArray, treeMap, normalizeColumns } from './util';
 import assign from 'object-assign';
-import splitObject from '../_util/splitObject';
 import warning from '../_util/warning';
 import createStore, { Store } from './createStore';
 import SelectionBox from './SelectionBox';
@@ -75,6 +74,7 @@ export interface TableProps<T> {
   childrenColumnName?: string;
   bodyStyle?: React.CSSProperties;
   className?: string;
+  style?: React.CSSProperties;
 }
 
 export interface TableContext {
@@ -823,9 +823,7 @@ export default class Table<T> extends React.Component<TableProps<T>, any> {
   }
 
   render() {
-    const [{
-      style, className, prefixCls,
-    }, restProps] = splitObject(this.props, ['style', 'className', 'prefixCls']);
+    const { style, className, prefixCls, ...restProps } = this.props;
     const data = this.getCurrentPageData();
     let columns = this.renderRowSelection();
     const expandIconAsCell = this.props.expandedRowRender && this.props.expandIconAsCell !== false;
@@ -846,7 +844,7 @@ export default class Table<T> extends React.Component<TableProps<T>, any> {
 
     let expandIconColumnIndex = (columns[0] && columns[0].key === 'selection-column') ? 1 : 0;
     if ('expandIconColumnIndex' in restProps) {
-      expandIconColumnIndex = restProps.expandIconColumnIndex;
+      expandIconColumnIndex = restProps.expandIconColumnIndex as number;
     }
 
     let table = (
diff --git a/components/tag/CheckableTag.tsx b/components/tag/CheckableTag.tsx
index 55ed63b1d4..edd8a35060 100644
--- a/components/tag/CheckableTag.tsx
+++ b/components/tag/CheckableTag.tsx
@@ -1,6 +1,5 @@
 import React from 'react';
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 
 export interface CheckableTagProps {
   prefixCls?: string;
@@ -17,15 +16,13 @@ export default class CheckableTag extends React.Component<CheckableTagProps, any
     }
   }
   render() {
-    const [{ prefixCls = 'ant-tag', className = '', checked }, restProps ] = splitObject(
-        this.props, ['prefixCls', 'className', 'checked']
-      );
+    const { prefixCls = 'ant-tag', className, checked, ...restProps } = this.props;
     const cls = classNames(prefixCls, {
       [`${prefixCls}-checkable`]: true,
       [`${prefixCls}-checkable-checked`]: checked,
     }, className);
 
-    delete restProps.onChange;
-    return <div {...restProps} className={cls} onClick={this.handleClick} />;
+    delete restProps.onChange; // TypeScript cannot check delete now.
+    return <div {...restProps as any} className={cls} onClick={this.handleClick} />;
   }
 }
diff --git a/components/tag/index.tsx b/components/tag/index.tsx
index 31e24cb725..00026221e4 100644
--- a/components/tag/index.tsx
+++ b/components/tag/index.tsx
@@ -6,10 +6,11 @@ import omit from 'omit.js';
 import assign from 'object-assign';
 import Icon from '../icon';
 import warning from '../_util/warning';
-import splitObject from '../_util/splitObject';
 import CheckableTag from './CheckableTag';
 
 export interface TagProps {
+  prefixCls?: string;
+  className?: string;
   color?: string;
   /** 标签是否可以关闭 */
   closable?: boolean;
@@ -73,12 +74,7 @@ export default class Tag extends React.Component<TagProps, any> {
   }
 
   render() {
-    const [{
-      prefixCls, closable, color, className, children, style,
-    }, otherProps] = splitObject(
-      this.props,
-      ['prefixCls', 'closable', 'color', 'className', 'children', 'style']
-    );
+    const { prefixCls, closable, color = '', className, children, style, ...otherProps } = this.props;
     const closeIcon = closable ? <Icon type="cross" onClick={this.close} /> : '';
     const classString = classNames(prefixCls, {
       [`${prefixCls}-${color}`]: !!color,
diff --git a/components/timeline/Timeline.tsx b/components/timeline/Timeline.tsx
index a4c7208125..a1ecb52396 100644
--- a/components/timeline/Timeline.tsx
+++ b/components/timeline/Timeline.tsx
@@ -1,9 +1,10 @@
 import React from 'react';
 import classNames from 'classnames';
 import TimelineItem from './TimelineItem';
-import splitObject from '../_util/splitObject';
 
 export interface TimelineProps {
+  prefixCls?: string;
+  className?: string;
   /** 指定最后一个幽灵节点是否存在或内容 */
   pending?: boolean | React.ReactNode;
   style?: React.CSSProperties;
@@ -16,17 +17,14 @@ export default class Timeline extends React.Component<TimelineProps, any> {
   };
 
   render() {
-    const [{
-      prefixCls, children, pending, className,
-    }, restProps] = splitObject(this.props,
-      ['prefixCls', 'children', 'pending', 'className']);
+    const { prefixCls, children, pending, className, ...restProps } = this.props;
     const pendingNode = typeof pending === 'boolean' ? null : pending;
     const classString = classNames(prefixCls, {
       [`${prefixCls}-pending`]: !!pending,
     }, className);
     const items = React.Children.map(children, (ele: React.ReactElement<any>, idx) =>
       React.cloneElement(ele, {
-        last: idx === children.length - 1,
+        last: idx === (children as { length: number }).length - 1,
       })
     );
     const pendingItem = (!!pending) ? (
diff --git a/components/timeline/TimelineItem.tsx b/components/timeline/TimelineItem.tsx
index 64ad8c3146..6853eafcc2 100644
--- a/components/timeline/TimelineItem.tsx
+++ b/components/timeline/TimelineItem.tsx
@@ -1,13 +1,13 @@
 import React from 'react';
 import classNames from 'classnames';
-import splitObject from '../_util/splitObject';
 
-// Timeline
 export interface TimeLineItemProps {
-  /** 指定圆圈颜色 */
+  prefixCls?: string;
+  className?: string;
   color?: string;
   dot?: React.ReactNode;
   pending?: boolean;
+  last?: boolean;
   style?: React.CSSProperties;
 }
 
@@ -20,10 +20,7 @@ export default class TimelineItem extends React.Component<TimeLineItemProps, any
   };
 
   render() {
-    const [{
-      prefixCls, color, last, children, pending, className, dot,
-    }, restProps] = splitObject(this.props,
-      ['prefixCls', 'color', 'last', 'children', 'pending', 'className', 'dot']);
+    const { prefixCls, className, color = '', last, children, pending, dot, ...restProps } = this.props;
 
     const itemClassName = classNames({
       [`${prefixCls}-item`]: true,
diff --git a/components/tooltip/index.tsx b/components/tooltip/index.tsx
index 40710bca2a..944b1b7bb0 100644
--- a/components/tooltip/index.tsx
+++ b/components/tooltip/index.tsx
@@ -27,7 +27,7 @@ export interface AbstractTooltipProps {
 }
 
 export interface TooltipProps extends AbstractTooltipProps {
-  title: React.ReactNode;
+  title?: React.ReactNode;
   overlay?: React.ReactNode;
 }