- 🌟 Add `showArrow` for disabling arrow icon in collapse panel. [#8536](https://github.com/ant-design/ant-design/pull/8536) [@apieceofbart](https://github.com/apieceofbart)
- 🌟 Rate add `allowClear` for reset when click again. [#8627](https://github.com/ant-design/ant-design/issues/8627)
- 🌟 Add responsive for BackTop. [#8719](https://github.com/ant-design/ant-design/issues/8719) [@JetRunner](https://github.com/JetRunner)
- 🌟 Add `destroyOnClose` to Modal component to support unmount child compenents on onClose. [#8769](https://github.com/ant-design/ant-design/pull/8769) [@Rohanhacker](https://github.com/Rohanhacker)
- 🌟 Pagination add `hideOnSinglePage` for support hide it when only one page. [#8615](https://github.com/ant-design/ant-design/pull/8615) [@camsong](https://github.com/camsong)
- 🌟 Optimize notification display in small screen. [#8631](https://github.com/ant-design/ant-design/issues/8631)
- 🌟 Optimize Pagination design and fix some issues of alignment and margin.
- 🐞 Upgrade to `react-slick@0.16.0` for peerDependencies warning. [#8455](https://github.com/ant-design/ant-design/issues/8455)
- 🐞 Fix not working `size` property in fixed-header Table. [#8577](https://github.com/ant-design/ant-design/issues/8577)
- 🐞 Fix not working `locale` property of DatePicker/RangePicker. [#8635](https://github.com/ant-design/ant-design/issues/8635)
- 🐞 Fix Popover arrow position and size cannot be overrided by less variable. [#8548](https://github.com/ant-design/ant-design/issues/8548) [#8549](https://github.com/ant-design/ant-design/issues/8549)
- 🐞 Fix not working `notFoundContent` of AutoComponent. [#8553](https://github.com/ant-design/ant-design/issues/8553)
- 🐞 Tweak RangePicker vertical align position.
- 🐞 Layout.Sider breakpoints is same as Grid's now. [#8620](https://github.com/ant-design/ant-design/issues/8620)
- 🐞 Fix submenu still showing in a collapsed menu when collapsedWidth is `0`. [#8587](https://github.com/ant-design/ant-design/issues/8587)
- 🐞 Fix Card's `Meta.title` text overflow not working. [#8597](https://github.com/ant-design/ant-design/issues/8597)
- 🐞 Fix pagination margin problem of bordered List. [#8562](https://github.com/ant-design/ant-design/issues/8562)
- 🐞 Fix Menu's submenu cannot open when specified non-existed `defaultOpenKeys`. [#8475](https://github.com/ant-design/ant-design/issues/8475)
- 🐞 Fix type name collisions of `InputProps` and `SearchProps` in Input, AutoComplete, Transfer. [#8478](https://github.com/ant-design/ant-design/issues/8478)
* Remove useless DOM wrapper of Card, so that Card's DOM structure will be the same as Card of 2.x.
* Fix that missing `antd/lib/style/v2-compatible-reset.css`. [28d13e2](https://github.com/ant-design/ant-design/commit/28d13e2539817f87b8a2029ea22d9c30b377167f)
* Fix that Affix will be overlap when it is heigher than viewport. [31a0654](https://github.com/ant-design/ant-design/commit/31a0654ef990eb7bae2b18095fa0d5230b9be1da)
* Fix the open animation of Collapse. [edd592c](https://github.com/ant-design/ant-design/commit/edd592cb9dd79d534853e7a0c1b648382e3f1a12)
* Fix the aligment of large size Input and Button in Form. [#8459](https://github.com/ant-design/ant-design/issues/8459)
* Menu
* Fix the popup will disappear unexpectly in Safari. [#8453](https://github.com/ant-design/ant-design/issues/8453)
* Fix the open animation. [edd592c](https://github.com/ant-design/ant-design/commit/edd592cb9dd79d534853e7a0c1b648382e3f1a12)
* Fix compile error of style of Notification. [#8437](https://github.com/ant-design/ant-design/issues/8437)
* Fix the background color of mini Pagination. [e13c6d8](https://github.com/ant-design/ant-design/commit/e13c6d87fa6bf7d5cf4b2d5154a85b4793997de5)
* Table
* Fix broken style in mobile. [#8465](https://github.com/ant-design/ant-design/issues/8465)
* Fix broken style when use size and nested Table together. [#8525](https://github.com/ant-design/ant-design/issues/8525)
* TypeScript
* Fix TypeScript definition of AutoComplete. [#8383](https://github.com/ant-design/ant-design/pull/8383) [@nidhi-ag](https://github.com/nidhi-ag)
* Fix TypeScript definition of Divider. [#8504](https://github.com/ant-design/ant-design/pull/8504) [@cyyyu](https://github.com/cyyyu)
* Fix TypeScript definition of Dropdown. [#8444](https://github.com/ant-design/ant-design/issues/8444)
* Fix TypeScript definition of List. [e27061e](https://github.com/ant-design/ant-design/commit/e27061ea5b2f2d3273b45862d9b87285448f0998) [1b2a955](https://github.com/ant-design/ant-design/commit/1b2a9550d9595dd2f31f79d1bdd52695ec792692)
* Fix TypeScript definition of Table. [#8507](https://github.com/ant-design/ant-design/issues/8507) [#8515](https://github.com/ant-design/ant-design/pull/8515) [@danedavid](https://github.com/danedavid)
- New [color system](https://ant.design/docs/spec/colors#Color-Palettes), We changed our primary color from 『`#108EE9`』 to 『`#1890FF`』, we called the new primary color "拂晓蓝 (Daybreak Blue)" which means the color of the sky at daybreak.
- 🌟 Added new `hourStep`, `minuteStep`, `secondStep` props to allow customizing time setps. [Demo](https://ant.design/components/time-picker/#components-time-picker-demo-interval-options)
- Don't need set `allowSyntheticDefaultImports` when using in TypeScript.
- We removed `react@0.14` and `react@15` from `peerDependencies`, though `antd@3.0` still works on old React versions, but we highly recommend you upgrading to React 16 since we may use the new features only exists in React 16 in the future. See [React 16](https://reactjs.org/blog/2017/09/26/react-v16.0.html)