diff --git a/components/badge/ScrollNumber.tsx b/components/badge/ScrollNumber.tsx
index 91d15293b0..036126df9f 100644
--- a/components/badge/ScrollNumber.tsx
+++ b/components/badge/ScrollNumber.tsx
@@ -93,9 +93,9 @@ export default class ScrollNumber extends Component<any, any> {
   }
 
   renderNumberList(position) {
-    const childrenToReturn = [];
+    const childrenToReturn: React.ReactElement<any>[] = [];
     for (let i = 0; i < 30; i++) {
-      const currentClassName = (position === i) ? 'current' : null;
+      const currentClassName = (position === i) ? 'current' : '';
       childrenToReturn.push(<p key={i.toString()} className={currentClassName}>{i % 10}</p>);
     }
     return childrenToReturn;
diff --git a/components/breadcrumb/Breadcrumb.tsx b/components/breadcrumb/Breadcrumb.tsx
index 2a18a5f498..e0879fd4d4 100755
--- a/components/breadcrumb/Breadcrumb.tsx
+++ b/components/breadcrumb/Breadcrumb.tsx
@@ -24,19 +24,20 @@ function getBreadcrumbName(route, params) {
   return name;
 }
 
+function defaultItemRender(route, params, routes, paths) {
+  const isLastItem = routes.indexOf(route) === routes.length - 1;
+  const name = getBreadcrumbName(route, params);
+  return isLastItem
+    ? <span>{name}</span>
+    : <a href={`#/${paths.join('/')}`}>{name}</a>;
+}
+
 export default class Breadcrumb extends React.Component<BreadcrumbProps, any> {
   static Item: any;
 
   static defaultProps = {
     prefixCls: 'ant-breadcrumb',
     separator: '/',
-    itemRender: (route, params, routes, paths) => {
-      const isLastItem = routes.indexOf(route) === routes.length - 1;
-      const name = getBreadcrumbName(route, params);
-      return isLastItem
-        ? <span>{name}</span>
-        : <a href={`#/${paths.join('/')}`}>{name}</a>;
-    },
   };
 
   static propTypes = {
@@ -62,12 +63,12 @@ export default class Breadcrumb extends React.Component<BreadcrumbProps, any> {
 
   render() {
     let crumbs;
-    const { separator, prefixCls, routes, params, children, itemRender } = this.props;
+    const { separator, prefixCls, routes, params = {}, children, itemRender = defaultItemRender } = this.props;
     if (routes && routes.length > 0) {
-      const paths = [];
+      const paths: string[] = [];
       crumbs = routes.map((route) => {
         route.path = route.path || '';
-        let path = route.path.replace(/^\//, '');
+        let path: string = route.path.replace(/^\//, '');
         Object.keys(params).forEach(key => {
           path = path.replace(`:${key}`, params[key]);
         });
@@ -83,7 +84,7 @@ export default class Breadcrumb extends React.Component<BreadcrumbProps, any> {
         }
         return null;
       });
-    } else {
+    } else if (children) {
       crumbs = React.Children.map(children, (element: any, index) => {
         return cloneElement(element, {
           separator,
diff --git a/components/button/button.tsx b/components/button/button.tsx
index 137de252c9..0aeeb63a06 100644
--- a/components/button/button.tsx
+++ b/components/button/button.tsx
@@ -48,7 +48,6 @@ export default class Button extends React.Component<ButtonProps, any> {
 
   static defaultProps = {
     prefixCls: 'ant-btn',
-    onClick() {},
     loading: false,
   };
 
@@ -87,7 +86,10 @@ export default class Button extends React.Component<ButtonProps, any> {
     clearTimeout(this.timeout);
     this.timeout = setTimeout(() => this.clearButton(buttonNode), 500);
 
-    this.props.onClick(e);
+    const onClick = this.props.onClick;
+    if (onClick) {
+      onClick(e);
+    }
   }
 
   // Handle auto focus when click button in Chrome
diff --git a/components/calendar/Header.tsx b/components/calendar/Header.tsx
index 1af4080988..60811083b3 100644
--- a/components/calendar/Header.tsx
+++ b/components/calendar/Header.tsx
@@ -1,12 +1,11 @@
 import React from 'react';
 import { PropTypes } from 'react';
+import moment from 'moment';
 import { PREFIX_CLS } from './Constants';
 import Select from '../select';
 import { Group, Button } from '../radio';
 const Option = Select.Option;
 
-function noop() {}
-
 export interface HeaderProps {
   prefixCls?: string;
   locale?: any;
@@ -24,8 +23,6 @@ export default class Header extends React.Component<HeaderProps, any> {
     prefixCls: `${PREFIX_CLS}-header`,
     yearSelectOffset: 10,
     yearSelectTotal: 20,
-    onValueChange: noop,
-    onTypeChange: noop,
   };
 
   static propTypes = {
@@ -47,13 +44,13 @@ export default class Header extends React.Component<HeaderProps, any> {
     const end = start + yearSelectTotal;
     const suffix = locale.year === '年' ? '年' : '';
 
-    const options = [];
+    const options: React.ReactElement<any>[] = [];
     for (let index = start; index < end; index++) {
       options.push(<Option key={`${index}`}>{index + suffix}</Option>);
     }
     return (
       <Select
-        size={fullscreen ? null : 'small'}
+        size={fullscreen ? 'default' : 'small'}
         dropdownMatchSelectWidth={false}
         className={`${prefixCls}-year-select`}
         onChange={this.onYearChange}
@@ -64,10 +61,10 @@ export default class Header extends React.Component<HeaderProps, any> {
     );
   }
 
-  getMonthsLocale(value) {
+  getMonthsLocale(value: moment.Moment) {
     const current = value.clone();
     const localeData = value.localeData();
-    const months = [];
+    const months: any[] = [];
     for (let i = 0; i < 12; i++) {
       current.month(i);
       months.push(localeData.monthsShort(current));
@@ -78,7 +75,7 @@ export default class Header extends React.Component<HeaderProps, any> {
   getMonthSelectElement(month, months) {
     const props = this.props;
     const { prefixCls, fullscreen } = props;
-    const options = [];
+    const options: React.ReactElement<any>[] = [];
 
     for (let index = 0; index < 12; index++) {
       options.push(<Option key={`${index}`}>{months[index]}</Option>);
@@ -86,7 +83,7 @@ export default class Header extends React.Component<HeaderProps, any> {
 
     return (
       <Select
-        size={fullscreen ? null : 'small'}
+        size={fullscreen ? 'default' : 'small'}
         dropdownMatchSelectWidth={false}
         className={`${prefixCls}-month-select`}
         value={String(month)}
@@ -100,17 +97,27 @@ export default class Header extends React.Component<HeaderProps, any> {
   onYearChange = (year) => {
     const newValue = this.props.value.clone();
     newValue.year(parseInt(year, 10));
-    this.props.onValueChange(newValue);
+
+    const onValueChange = this.props.onValueChange;
+    if (onValueChange) {
+      onValueChange(newValue);
+    }
   }
 
   onMonthChange = (month) => {
     const newValue = this.props.value.clone();
     newValue.month(parseInt(month, 10));
-    this.props.onValueChange(newValue);
+    const onValueChange = this.props.onValueChange;
+    if (onValueChange) {
+      onValueChange(newValue);
+    }
   }
 
   onTypeChange = (e) => {
-    this.props.onTypeChange(e.target.value);
+    const onTypeChange = this.props.onTypeChange;
+    if (onTypeChange) {
+      onTypeChange(e.target.value);
+    }
   }
 
   render() {
diff --git a/components/calendar/index.tsx b/components/calendar/index.tsx
index dcca955339..116abdb7b0 100644
--- a/components/calendar/index.tsx
+++ b/components/calendar/index.tsx
@@ -38,12 +38,9 @@ export interface CalendarProps {
 
 export default class Calendar extends React.Component<CalendarProps, any> {
   static defaultProps = {
-    monthCellRender: noop,
-    dateCellRender: noop,
     locale: {},
     fullscreen: true,
     prefixCls: PREFIX_CLS,
-    onPanelChange: noop,
     mode: 'month',
   };
 
@@ -82,28 +79,28 @@ export default class Calendar extends React.Component<CalendarProps, any> {
   }
 
   monthCellRender = (value) => {
-    const prefixCls = this.props.prefixCls;
+    const { prefixCls, monthCellRender = noop as Function } = this.props;
     return (
       <div className={`${prefixCls}-month`}>
         <div className={`${prefixCls}-value`}>
           {value.localeData().monthsShort(value)}
         </div>
         <div className={`${prefixCls}-content`}>
-          {this.props.monthCellRender(value)}
+          {monthCellRender(value)}
         </div>
       </div>
     );
   }
 
   dateCellRender = (value) => {
-    const prefixCls = this.props.prefixCls;
+    const { prefixCls, dateCellRender = noop as Function } = this.props;
     return (
       <div className={`${prefixCls}-date`}>
         <div className={`${prefixCls}-value`}>
           {zerofixed(value.date())}
         </div>
         <div className={`${prefixCls}-content`}>
-          {this.props.dateCellRender(value)}
+          {dateCellRender(value)}
         </div>
       </div>
     );
@@ -113,14 +110,20 @@ export default class Calendar extends React.Component<CalendarProps, any> {
     if (!('value' in this.props) && this.state.value !== value) {
       this.setState({ value });
     }
-    this.props.onPanelChange(value, this.state.mode);
+    const onPanelChange = this.props.onPanelChange;
+    if (onPanelChange) {
+      onPanelChange(value, this.state.mode);
+    }
   }
 
   setType = (type) => {
     const mode = (type === 'date') ? 'month' : 'year';
     if (this.state.mode !== mode) {
       this.setState({ mode });
-      this.props.onPanelChange(this.state.value, mode);
+      const onPanelChange = this.props.onPanelChange;
+      if (onPanelChange) {
+        onPanelChange(this.state.value, mode);
+      }
     }
   }
 
diff --git a/components/cascader/index.tsx b/components/cascader/index.tsx
index 1f024fafbc..c5ac33b4bd 100644
--- a/components/cascader/index.tsx
+++ b/components/cascader/index.tsx
@@ -89,6 +89,8 @@ function defaultSortFilteredOption(a, b, inputValue) {
   return a.findIndex(callback) - b.findIndex(callback);
 }
 
+const defaultDisplayRender = label => label.join(' / ');
+
 export default class Cascader extends React.Component<CascaderProps, any> {
   static defaultProps = {
     prefixCls: 'ant-cascader',
@@ -96,14 +98,11 @@ export default class Cascader extends React.Component<CascaderProps, any> {
     placeholder: 'Please select',
     transitionName: 'slide-up',
     popupPlacement: 'bottomLeft',
-    onChange() {},
     options: [],
-    displayRender: label => label.join(' / '),
     disabled: false,
     allowClear: true,
     showSearch: false,
     notFoundContent: 'Not Found',
-    onPopupVisibleChange() {},
   };
 
   cachedOptions: CascaderOptionType[];
@@ -146,7 +145,11 @@ export default class Cascader extends React.Component<CascaderProps, any> {
       inputFocused: popupVisible,
       inputValue: popupVisible ? this.state.inputValue : '',
      });
-    this.props.onPopupVisibleChange(popupVisible);
+
+    const onPopupVisibleChange = this.props.onPopupVisibleChange;
+    if (onPopupVisibleChange) {
+      onPopupVisibleChange(popupVisible);
+    }
   }
 
   handleInputBlur = () => {
@@ -173,11 +176,14 @@ export default class Cascader extends React.Component<CascaderProps, any> {
     if (!('value' in this.props)) {
       this.setState({ value });
     }
-    this.props.onChange(value, selectedOptions);
+    const onChange = this.props.onChange;
+    if (onChange) {
+      onChange(value, selectedOptions);
+    }
   }
 
   getLabel() {
-    const { options, displayRender } = this.props;
+    const { options, displayRender = defaultDisplayRender as Function } = this.props;
     const value = this.state.value;
     const unwrappedValue = Array.isArray(value[0]) ? value[0] : value;
     const selectedOptions = arrayTreeFilter(options, (o, level) => o.value === unwrappedValue[level]);
@@ -197,7 +203,7 @@ export default class Cascader extends React.Component<CascaderProps, any> {
   }
 
   flattenTree(options, changeOnSelect, ancestor = []) {
-    let flattenOptions = [];
+    let flattenOptions: any = [];
     options.forEach((option) => {
       const path = ancestor.concat(option);
       if (changeOnSelect || !option.children) {
@@ -293,10 +299,7 @@ export default class Cascader extends React.Component<CascaderProps, any> {
       this.cachedOptions = options;
     }
 
-    const dropdownMenuColumnStyle = {
-      width: undefined,
-      height: undefined,
-    };
+    const dropdownMenuColumnStyle: { width?: number, height?: string } = {};
     const isNotFound = (options || []).length === 1 && options[0].value === 'ANT_CASCADER_NOT_FOUND';
     if (isNotFound) {
       dropdownMenuColumnStyle.height = 'auto'; // Height of one row.
@@ -330,9 +333,9 @@ export default class Cascader extends React.Component<CascaderProps, any> {
               disabled={disabled}
               readOnly={!showSearch}
               autoComplete="off"
-              onClick={showSearch ? this.handleInputClick : null}
-              onBlur={showSearch ? this.handleInputBlur : null}
-              onChange={showSearch ? this.handleInputChange : null}
+              onClick={showSearch ? this.handleInputClick : undefined}
+              onBlur={showSearch ? this.handleInputBlur : undefined}
+              onChange={showSearch ? this.handleInputChange : undefined}
             />
             <span className={`${prefixCls}-picker-label`}>
               {this.getLabel()}
diff --git a/components/checkbox/Group.tsx b/components/checkbox/Group.tsx
index a0e8582338..4e81dd1bf8 100644
--- a/components/checkbox/Group.tsx
+++ b/components/checkbox/Group.tsx
@@ -29,7 +29,6 @@ export interface CheckboxGroupState {
 export default class CheckboxGroup extends React.Component<CheckboxGroupProps, CheckboxGroupState> {
   static defaultProps = {
     options: [],
-    onChange() {},
     prefixCls: 'ant-checkbox-group',
   };
   static propTypes = {
@@ -78,7 +77,10 @@ export default class CheckboxGroup extends React.Component<CheckboxGroupProps, C
     if (!('value' in this.props)) {
       this.setState({ value });
     }
-    this.props.onChange(value);
+    const onChange = this.props.onChange;
+    if (onChange) {
+      onChange(value);
+    }
   }
   render() {
     const { prefixCls } = this.props;
diff --git a/components/date-picker/createPicker.tsx b/components/date-picker/createPicker.tsx
index 906b34fc77..fff4062f5c 100644
--- a/components/date-picker/createPicker.tsx
+++ b/components/date-picker/createPicker.tsx
@@ -123,7 +123,7 @@ export default function createPicker(TheCalendar) {
       );
 
       // default width for showTime
-      const pickerStyle = { width: undefined };
+      const pickerStyle: { width?: number } = {};
       if (props.showTime) {
         pickerStyle.width = 180;
       }
diff --git a/components/form/Form.tsx b/components/form/Form.tsx
index 92491974cf..2090d574ec 100755
--- a/components/form/Form.tsx
+++ b/components/form/Form.tsx
@@ -162,7 +162,7 @@ export default class Form extends React.Component<FormProps, any> {
   }
 
   render() {
-    const { prefixCls, className, inline, horizontal, vertical } = this.props;
+    const { prefixCls, className = '', inline, horizontal, vertical } = this.props;
     const formClassName = classNames({
       [`${prefixCls}`]: true,
       [`${prefixCls}-horizontal`]: horizontal,
diff --git a/components/form/FormItem.tsx b/components/form/FormItem.tsx
index 42cff6071f..a8c2ff5784 100644
--- a/components/form/FormItem.tsx
+++ b/components/form/FormItem.tsx
@@ -15,7 +15,7 @@ export interface FormItemLabelColOption {
 export interface FormItemProps {
   prefixCls?: string;
   id?: string;
-  label?: string | React.ReactNode;
+  label?: React.ReactNode;
   labelCol?: FormItemLabelColOption;
   wrapperCol?: FormItemLabelColOption;
   help?: React.ReactNode;
@@ -26,6 +26,7 @@ export interface FormItemProps {
   required?: boolean;
   style?: React.CSSProperties;
   colon?: boolean;
+  children: any;
 }
 
 export interface FormItemContext {
@@ -86,7 +87,7 @@ export default class FormItem extends React.Component<FormItemProps, any> {
   }
 
   getControls(children, recursively) {
-    let controls = [];
+    let controls: React.ReactElement<any>[] = [];
     const childrenArray = React.Children.toArray(children);
     for (let i = 0; i < childrenArray.length; i++) {
       if (!recursively && controls.length > 0) {
@@ -220,7 +221,7 @@ export default class FormItem extends React.Component<FormItemProps, any> {
 
     // remove user input colon
     let label = props.label;
-    if (typeof label === 'string' && label.trim() !== '') {
+    if (typeof label === 'string' && (label as string).trim() !== '') {
       label = (props.label as string).replace(/[：|:]\s*$/, '');
     }
 
diff --git a/components/input/Group.tsx b/components/input/Group.tsx
index 08a9bffd0b..098459fd25 100644
--- a/components/input/Group.tsx
+++ b/components/input/Group.tsx
@@ -10,14 +10,15 @@ export interface GroupProps {
 }
 
 const Group: React.StatelessComponent<GroupProps> = (props) => {
-  const className = classNames({
-    [props.prefixCls]: true,
+  const { prefixCls = 'ant-input-group', className = '' } = props;
+  const cls = classNames({
+    [prefixCls]: true,
     [`${props.prefixCls}-lg`]: props.size === 'large',
     [`${props.prefixCls}-sm`]: props.size === 'small',
-    [props.className]: !!props.className,
+    [className]: !!className,
   });
   return (
-    <span className={className} style={props.style}>
+    <span className={cls} style={props.style}>
       {props.children}
     </span>
   );
@@ -27,8 +28,4 @@ Group.propTypes = {
   children: React.PropTypes.any,
 };
 
-Group.defaultProps = {
-  prefixCls: 'ant-input-group',
-};
-
 export default Group;
diff --git a/components/input/Input.tsx b/components/input/Input.tsx
index 012d03cd9a..da073f3462 100644
--- a/components/input/Input.tsx
+++ b/components/input/Input.tsx
@@ -61,9 +61,6 @@ export default class Input extends Component<InputProps, any> {
     disabled: false,
     prefixCls: 'ant-input',
     type: 'text',
-    onPressEnter() {},
-    onKeyDown() {},
-    onChange() {},
     autosize: false,
   };
 
@@ -114,17 +111,23 @@ export default class Input extends Component<InputProps, any> {
   }
 
   handleKeyDown = (e) => {
-    if (e.keyCode === 13) {
-      this.props.onPressEnter(e);
+    const { onPressEnter, onKeyDown } = this.props;
+    if (e.keyCode === 13 && onPressEnter) {
+      onPressEnter(e);
+    }
+    if (onKeyDown) {
+      onKeyDown(e);
     }
-    this.props.onKeyDown(e);
   }
 
   handleTextareaChange = (e) => {
     if (!('value' in this.props)) {
       this.resizeTextarea();
     }
-    this.props.onChange(e);
+    const onChange = this.props.onChange;
+    if (onChange) {
+      onChange(e);
+    }
   }
 
   resizeTextarea = () => {
diff --git a/components/input/calculateNodeHeight.tsx b/components/input/calculateNodeHeight.tsx
index 447fb6776b..9d338489a4 100644
--- a/components/input/calculateNodeHeight.tsx
+++ b/components/input/calculateNodeHeight.tsx
@@ -87,8 +87,8 @@ function calculateNodeStyling(node, useCache = false) {
 export default function calculateNodeHeight(
   uiTextNode,
   useCache = false,
-  minRows = null,
-  maxRows = null
+  minRows: number | null = null,
+  maxRows: number | null = null
 ) {
   if (!hiddenTextarea) {
     hiddenTextarea = document.createElement('textarea');
diff --git a/components/layout/col.tsx b/components/layout/col.tsx
index f56a99e4c6..e277511317 100644
--- a/components/layout/col.tsx
+++ b/components/layout/col.tsx
@@ -30,52 +30,53 @@ export interface ColProps {
   style?: React.CSSProperties;
 }
 
-const Col: React.StatelessComponent<ColProps> = (props) => {
-  const [{ span, order, offset, push, pull, className, children, prefixCls = 'ant-col' }, others] = splitObject(props,
-    ['span', 'order', 'offset', 'push', 'pull', 'className', 'children', 'prefixCls']);
-  let sizeClassObj = {};
-  ['xs', 'sm', 'md', 'lg'].forEach(size => {
-    let sizeProps: ColSize = {};
-    if (typeof props[size] === 'number') {
-      sizeProps.span = props[size];
-    } else if (typeof props[size] === 'object') {
-      sizeProps = props[size] || {};
-    }
+export default class Col extends React.Component<ColProps, any> {
+  static propTypes = {
+    span: stringOrNumber,
+    order: stringOrNumber,
+    offset: stringOrNumber,
+    push: stringOrNumber,
+    pull: stringOrNumber,
+    className: PropTypes.string,
+    children: PropTypes.node,
+    xs: objectOrNumber,
+    sm: objectOrNumber,
+    md: objectOrNumber,
+    lg: objectOrNumber,
+  };
 
-    delete others[size];
+  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']);
+    let sizeClassObj = {};
+    ['xs', 'sm', 'md', 'lg'].forEach(size => {
+      let sizeProps: ColSize = {};
+      if (typeof props[size] === 'number') {
+        sizeProps.span = props[size];
+      } else if (typeof props[size] === 'object') {
+        sizeProps = props[size] || {};
+      }
 
-    sizeClassObj = assign({}, sizeClassObj, {
-      [`${prefixCls}-${size}-${sizeProps.span}`]: sizeProps.span !== undefined,
-      [`${prefixCls}-${size}-order-${sizeProps.order}`]: sizeProps.order,
-      [`${prefixCls}-${size}-offset-${sizeProps.offset}`]: sizeProps.offset,
-      [`${prefixCls}-${size}-push-${sizeProps.push}`]: sizeProps.push,
-      [`${prefixCls}-${size}-pull-${sizeProps.pull}`]: sizeProps.pull,
+      delete others[size];
+
+      sizeClassObj = assign({}, sizeClassObj, {
+        [`${prefixCls}-${size}-${sizeProps.span}`]: sizeProps.span !== undefined,
+        [`${prefixCls}-${size}-order-${sizeProps.order}`]: sizeProps.order,
+        [`${prefixCls}-${size}-offset-${sizeProps.offset}`]: sizeProps.offset,
+        [`${prefixCls}-${size}-push-${sizeProps.push}`]: sizeProps.push,
+        [`${prefixCls}-${size}-pull-${sizeProps.pull}`]: sizeProps.pull,
+      });
     });
-  });
-  const classes = classNames(assign({}, {
-    [`${prefixCls}-${span}`]: span !== undefined,
-    [`${prefixCls}-order-${order}`]: order,
-    [`${prefixCls}-offset-${offset}`]: offset,
-    [`${prefixCls}-push-${push}`]: push,
-    [`${prefixCls}-pull-${pull}`]: pull,
-    [className]: !!className,
-  }, sizeClassObj));
+    const classes = classNames(assign({}, {
+      [`${prefixCls}-${span}`]: span !== undefined,
+      [`${prefixCls}-order-${order}`]: order,
+      [`${prefixCls}-offset-${offset}`]: offset,
+      [`${prefixCls}-push-${push}`]: push,
+      [`${prefixCls}-pull-${pull}`]: pull,
+      [className]: !!className,
+    }, sizeClassObj));
 
-  return <div {...others} className={classes}>{children}</div>;
-};
-
-Col.propTypes = {
-  span: stringOrNumber,
-  order: stringOrNumber,
-  offset: stringOrNumber,
-  push: stringOrNumber,
-  pull: stringOrNumber,
-  className: PropTypes.string,
-  children: PropTypes.node,
-  xs: objectOrNumber,
-  sm: objectOrNumber,
-  md: objectOrNumber,
-  lg: objectOrNumber,
-};
-
-export default Col;
+    return <div {...others} className={classes}>{children}</div>;
+  }
+}
diff --git a/components/locale-provider/index.tsx b/components/locale-provider/index.tsx
index b23f858b28..5711699828 100644
--- a/components/locale-provider/index.tsx
+++ b/components/locale-provider/index.tsx
@@ -13,6 +13,7 @@ export interface LocaleProviderProps {
     Transfer?: Object,
     Select?: Object,
   };
+  children: any;
 }
 
 export default class LocaleProvider extends React.Component<LocaleProviderProps, any> {
diff --git a/components/mention/index.tsx b/components/mention/index.tsx
index 9a11dcc104..d625c56ada 100644
--- a/components/mention/index.tsx
+++ b/components/mention/index.tsx
@@ -31,7 +31,6 @@ export default class Mention extends React.Component<MentionProps, MentionState>
   static getMentions = getMentions;
   static defaultProps = {
     prefixCls: 'ant-mention',
-    suggestions: [],
     notFoundContent: '无匹配结果，轻敲空格完成输入',
     loading: false,
     multiLines: false,
@@ -65,7 +64,7 @@ export default class Mention extends React.Component<MentionProps, MentionState>
 
   defaultSearchChange(value: String): void {
     const searchValue = value.toLowerCase();
-    const filteredSuggestions = this.props.suggestions.filter(
+    const filteredSuggestions = (this.props.suggestions || []).filter(
       suggestion => suggestion.toLowerCase().indexOf(searchValue) !== -1
     );
     this.setState({
@@ -74,7 +73,7 @@ export default class Mention extends React.Component<MentionProps, MentionState>
   }
 
   render() {
-    const { className, prefixCls, style, multiLines, defaultValue } = this.props;
+    const { className = '', prefixCls, style, multiLines, defaultValue } = this.props;
     let { notFoundContent } = this.props;
 
     const { suggestions, focus } = this.state;
diff --git a/components/menu/index.tsx b/components/menu/index.tsx
index da0df7b785..36cd62273f 100644
--- a/components/menu/index.tsx
+++ b/components/menu/index.tsx
@@ -3,9 +3,6 @@ import RcMenu, { Item, Divider, SubMenu, ItemGroup } from 'rc-menu';
 import animation from '../_util/openAnimation';
 import warning from 'warning';
 
-function noop() {
-}
-
 export interface SelectParam {
   key: string;
   keyPath: Array<string>;
@@ -61,8 +58,6 @@ export default class Menu extends React.Component<MenuProps, any> {
   static ItemGroup = ItemGroup;
   static defaultProps = {
     prefixCls: 'ant-menu',
-    onClick: noop,
-    onOpenChange: noop,
     className: '',
     theme: 'light',  // or dark
   };
@@ -90,11 +85,19 @@ export default class Menu extends React.Component<MenuProps, any> {
   }
   handleClick = (e) => {
     this.setOpenKeys([]);
-    this.props.onClick(e);
+
+    const onClick = this.props.onClick;
+    if (onClick) {
+      onClick(e);
+    }
   }
   handleOpenChange = (openKeys: string[]) => {
     this.setOpenKeys(openKeys);
-    this.props.onOpenChange(openKeys);
+
+    const onOpenChange = this.props.onOpenChange;
+    if (onOpenChange) {
+      onOpenChange(openKeys);
+    }
   }
   setOpenKeys(openKeys) {
     if (!('openKeys' in this.props)) {
diff --git a/components/message/index.tsx b/components/message/index.tsx
index 0ea7ef2e9f..c3810a90cf 100755
--- a/components/message/index.tsx
+++ b/components/message/index.tsx
@@ -23,7 +23,7 @@ function notice(
   content: React.ReactNode,
   duration: number = defaultDuration,
   type: NoticeType,
-  onClose: () => void) {
+  onClose?: () => void) {
   let iconType = ({
     info: 'info-circle',
     success: 'check-circle',
@@ -64,7 +64,7 @@ export interface ConfigOptions {
 }
 
 export default {
-  info(content: ConfigContent, duration?: ConfigDuration, onClose?: () => ConfigOnClose) {
+  info(content: ConfigContent, duration?: ConfigDuration, onClose?: ConfigOnClose) {
     return notice(content, duration, 'info', onClose);
   },
   success(content: ConfigContent, duration?: ConfigDuration, onClose?: ConfigOnClose) {
@@ -85,13 +85,13 @@ export default {
   },
 
   config(options: ConfigOptions) {
-    if ('top' in options) {
+    if (options.top !== undefined) {
       defaultTop = options.top;
     }
-    if ('duration' in options) {
+    if (options.duration !== undefined) {
       defaultDuration = options.duration;
     }
-    if ('prefixCls' in options) {
+    if (options.prefixCls !== undefined) {
       prefixCls = options.prefixCls;
     }
   },
diff --git a/components/modal/Modal.tsx b/components/modal/Modal.tsx
index 93ff9c2be0..450dd1a247 100644
--- a/components/modal/Modal.tsx
+++ b/components/modal/Modal.tsx
@@ -4,8 +4,6 @@ import Dialog from 'rc-dialog';
 import addEventListener from 'rc-util/lib/Dom/addEventListener';
 import Button from '../button';
 
-function noop() {}
-
 let mousePosition;
 let mousePositionEventBinded;
 
@@ -55,8 +53,6 @@ export default class Modal extends React.Component<ModalProps, any> {
 
   static defaultProps = {
     prefixCls: 'ant-modal',
-    onOk: noop,
-    onCancel: noop,
     width: 520,
     transitionName: 'zoom',
     maskTransitionName: 'fade',
@@ -86,11 +82,17 @@ export default class Modal extends React.Component<ModalProps, any> {
   context: ModalContext;
 
   handleCancel = (e) => {
-    this.props.onCancel(e);
+    const onCancel = this.props.onCancel;
+    if (onCancel) {
+      onCancel(e);
+    }
   }
 
   handleOk = () => {
-    this.props.onOk();
+    const onOk = this.props.onOk;
+    if (onOk) {
+      onOk();
+    }
   }
 
   componentDidMount() {
diff --git a/components/modal/confirm.tsx b/components/modal/confirm.tsx
index fbe63ac816..a95a6ea39c 100644
--- a/components/modal/confirm.tsx
+++ b/components/modal/confirm.tsx
@@ -101,7 +101,7 @@ export default function confirm(config) {
     </div>
   );
 
-  let footer = null;
+  let footer: React.ReactElement<any> | null = null;
   if (props.okCancel) {
     footer = (
       <div className={`${prefixCls}-btns`}>
diff --git a/components/notification/index.tsx b/components/notification/index.tsx
index 3cc659645b..1fc630558c 100755
--- a/components/notification/index.tsx
+++ b/components/notification/index.tsx
@@ -113,10 +113,10 @@ const api: {
     }
   },
   config(options: ConfigProps) {
-    if ('top' in options) {
+    if (options.top !== undefined) {
       defaultTop = options.top;
     }
-    if ('duration' in options) {
+    if (options.duration !== undefined) {
       defaultDuration = options.duration;
     }
   },
diff --git a/components/popconfirm/index.tsx b/components/popconfirm/index.tsx
index d6af894017..4f3a412e9b 100644
--- a/components/popconfirm/index.tsx
+++ b/components/popconfirm/index.tsx
@@ -4,8 +4,6 @@ import Icon from '../icon';
 import Button from '../button';
 import splitObject from '../_util/splitObject';
 
-const noop = () => {};
-
 export interface PopconfirmProps {
   /**
    * Position of popup-container, options:`top`, `left`, `right`, `bottom`
@@ -46,9 +44,6 @@ export default class Popconfirm extends React.Component<PopconfirmProps, any> {
     transitionName: 'zoom-big',
     placement: 'top',
     trigger: 'click',
-    onConfirm: noop,
-    onCancel: noop,
-    onVisibleChange: noop,
   };
 
   static contextTypes = {
@@ -72,12 +67,20 @@ export default class Popconfirm extends React.Component<PopconfirmProps, any> {
 
   confirm = () => {
     this.setVisible(false);
-    this.props.onConfirm.call(this);
+
+    const onConfirm = this.props.onConfirm;
+    if (onConfirm) {
+      onConfirm.call(this);
+    }
   }
 
   cancel = () => {
     this.setVisible(false);
-    this.props.onCancel.call(this);
+
+    const onCancel = this.props.onCancel;
+    if (onCancel) {
+      onCancel.call(this);
+    }
   }
 
   onVisibleChange = (visible) => {
@@ -88,7 +91,11 @@ export default class Popconfirm extends React.Component<PopconfirmProps, any> {
     if (!('visible' in this.props)) {
       this.setState({ visible });
     }
-    this.props.onVisibleChange(visible);
+
+    const onVisibleChange = this.props.onVisibleChange;
+    if (onVisibleChange) {
+      onVisibleChange(visible);
+    }
   }
 
   render() {
diff --git a/components/popover/index.tsx b/components/popover/index.tsx
index 7d1f0acd91..c698e9e1e8 100644
--- a/components/popover/index.tsx
+++ b/components/popover/index.tsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import assign from 'object-assign';
 import Tooltip from '../tooltip';
 
 export interface PopoverProps {
@@ -11,7 +12,7 @@ export interface PopoverProps {
    placement?: 'top' | 'left' | 'right' | 'bottom' | 'topLeft' | 'topRight' |
    'bottomLeft' | 'bottomRight' | 'leftTop' | 'leftBottom' | 'rightTop' | 'rightBottom';
    /** title of popup-container */
-   title?: React.ReactNode | string;
+   title?: React.ReactNode;
    /** classname of popup-container */
    overlayClassName?: string;
    /** Style of overlay */
@@ -43,10 +44,12 @@ export default class Popover extends React.Component<PopoverProps, any> {
   };
 
   render() {
+    const props = assign({}, this.props);
+    delete props.title;
     return (
       <Tooltip
         ref="tooltip"
-        {...this.props}
+        {...props}
         overlay={this.getOverlay()}
       />
     );