diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index a628b70c30..59eff5965a 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,22 +1,42 @@
-First of all, thank you for your contribution! :-)
+First of all, thank you for your contribution! 😄
 
-Please makes sure that these checkboxes are checked before submitting your pull request, thank you!
+Please makes sure that these form are filled before submitting your pull request, thank you!
 
-* [ ] Make sure that you propose pull request to right branch: bugfix for `master`, feature for branch `feature`.
-* [ ] Make sure that you follow antd's [code convention](https://github.com/ant-design/ant-design/wiki/Code-convention-for-antd).
-* [ ] Run `npm run lint` and fix those errors before submitting in order to keep consistent code style.
-* [ ] Rebase before creating a pull request to keep commit history clear.
-* [ ] Add some descriptions and refer relative issues for you pull request.
+[[中文版](https://github.com/ant-design/ant-design/blob/master/.github/PULL_REQUEST_TEMPLATE/pr_cn.md)]
 
-Extra checklist:
+### This is a ...
 
-**if** *isBugFix* **:**
+- [ ] New feature
+- [ ] Bug fix
+- [ ] Site / document update
+- [ ] Branch merge
+- [ ] Other (about what?)
 
-  * [ ] Make sure that you add at least one unit test for the bug which you had fixed.
+### What's the background?
+  
+> 1. Describe the source of requirement.
+> 2. Resolve what problem.
+> 3. Related issue link.
+  
+### API Realization (Optional if not new feature)
+  
+> 1. Basic thought of solution and other optional proposal.
+> 2. List final API realization and usage sample.
+> 3. GIF or snapshot should be provided if includes UI/interactive modification.
+  
+### What's the effect? (Optional if not new feature)
 
-**elif** *isNewFeature* **:**
+> 1. Does this PR affect user? Which part will be affected?
+> 2. What will say in changelog?
+> 3. Does this PR contains potential break change or other risk?
 
-  * [ ] Update API docs for the component.
-  * [ ] Update/Add demo to demonstrate new feature.
-  * [ ] Update TypeScript definition for the component.
-  * [ ] Add unit tests for the feature.
+### Self Check before Merge
+
+- [ ] Doc is updated/provided or not needed
+- [ ] Demo is updated/provided or not needed
+- [ ] TypeScript definition is updated/provided or not needed
+- [ ] Changelog provided
+
+### Additional Plan? (Optional if not new feature)
+
+> If this PR related with other PR or following info. You can type here.
diff --git a/.github/PULL_REQUEST_TEMPLATE/collaborator.md b/.github/PULL_REQUEST_TEMPLATE/collaborator.md
deleted file mode 100644
index 258332b2bb..0000000000
--- a/.github/PULL_REQUEST_TEMPLATE/collaborator.md
+++ /dev/null
@@ -1,33 +0,0 @@
-### This is a ...
-
-- [ ] New feature
-- [ ] Other
-
-### What's the background?
-  
-> 1. Describe the source of requirement.
-> 2. Resolve what problem.
-> 3. Related issue link.
-  
-### API Realization
-  
-> 1. Basic thought of solution and other optional proposal.
-> 2. List final API realization and usage sample.
-> 3. GIF or snapshot should be provided if includes UI/interactive modification.
-  
-### What's the affect?
-
-> 1. Does this PR affect user? Which part will be affected?
-> 2. What will say in changelog?
-> 3. Does this PR contains potential break change or other risk?
-
-### Self Check before Merge
-
-- [ ] Doc is ready or not need
-- [ ] Demo is provided or not need
-- [ ] TypeScript definition is ready or not need
-- [ ] Changelog provided
-
-### Additional Plan?
-
-> If this PR related with other PR or following info. You can type here.
diff --git a/.github/PULL_REQUEST_TEMPLATE/pr_cn.md b/.github/PULL_REQUEST_TEMPLATE/pr_cn.md
new file mode 100644
index 0000000000..949d22d389
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE/pr_cn.md
@@ -0,0 +1,42 @@
+首先，感谢你的贡献！😄
+
+请确保填写以下 pull request 的信息，谢谢！~
+
+[[English Version](?expand=1)]
+
+### 这个变动的性质是
+
+- [ ] 新特性提交
+- [ ] 日常 bug 修复
+- [ ] 站点、文档改进
+- [ ] 分支合
+- [ ] 其他改动（是关于什么的改动？）
+
+### 需求背景
+  
+> 1. 描述相关需求的来源。
+> 2. 要解决的问题。
+> 3. 相关的 issue 讨论链接。
+  
+### 实现方案和 API
+  
+> 1. 基本的解决思路和其他可选方案。
+> 2. 列出最终的 API 实现和用法。
+> 3. 涉及UI/交互变动需要有截图或 GIF。
+  
+### 对用户的影响和可能的风险
+
+> 1. 这个改动对用户端是否有影响？影响的方面有哪些？
+> 2. 预期的 changelog 要怎么写？
+> 3. 是否有可能隐含的 break change 和其他风险？
+
+### 请求合并前的自查清单
+
+- [ ] 文档已补充或无须补充
+- [ ] 代码演示已提供或无须提供
+- [ ] TypeScript 定义已补充或无须补充
+- [ ] Changelog 已提供或无须提供
+
+### 后续计划
+
+> 如果这个提交后面还有相关的其他提交和跟进信息，可以写在这里。
diff --git a/components/_util/raf.ts b/components/_util/raf.ts
index 7d3e12dc8b..a0138e4239 100644
--- a/components/_util/raf.ts
+++ b/components/_util/raf.ts
@@ -28,7 +28,7 @@ export default function wrapperRaf(callback: () => void, delayFrames: number = 1
   return myId;
 }
 
-wrapperRaf.cancel = function(id: number) {
-  raf.cancel(ids[id]);
-  delete ids[id];
+wrapperRaf.cancel = function(pid: number) {
+  raf.cancel(ids[pid]);
+  delete ids[pid];
 };
diff --git a/components/affix/index.tsx b/components/affix/index.tsx
index c7e96f742d..7770ba71b8 100644
--- a/components/affix/index.tsx
+++ b/components/affix/index.tsx
@@ -98,6 +98,7 @@ export default class Affix extends React.Component<AffixProps, AffixState> {
     if (shallowequal(affixStyle, originalAffixStyle)) {
       return;
     }
+
     this.setState({ affixStyle: affixStyle as React.CSSProperties }, () => {
       const affixed = !!this.state.affixStyle;
       if ((affixStyle && !originalAffixStyle) || (!affixStyle && originalAffixStyle)) {
@@ -163,7 +164,8 @@ export default class Affix extends React.Component<AffixProps, AffixState> {
     const targetRect = getTargetRect(targetNode);
     const targetInnerHeight =
       (targetNode as Window).innerHeight || (targetNode as HTMLElement).clientHeight;
-    if (scrollTop > elemOffset.top - (offsetTop as number) && offsetMode.top) {
+    // ref: https://github.com/ant-design/ant-design/issues/13662
+    if (scrollTop >= elemOffset.top - (offsetTop as number) && offsetMode.top) {
       // Fixed Top
       const width = elemOffset.width;
       const top = targetRect.top + (offsetTop as number);
@@ -178,7 +180,8 @@ export default class Affix extends React.Component<AffixProps, AffixState> {
         height: elemSize.height,
       });
     } else if (
-      scrollTop < elemOffset.top + elemSize.height + (offsetBottom as number) - targetInnerHeight &&
+      scrollTop <=
+        elemOffset.top + elemSize.height + (offsetBottom as number) - targetInnerHeight &&
       offsetMode.bottom
     ) {
       // Fixed Bottom
diff --git a/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap b/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
index 629b751ab9..ac7b6978fd 100644
--- a/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/auto-complete/__tests__/__snapshots__/demo.test.js.snap
@@ -7,7 +7,7 @@ exports[`renders ./components/auto-complete/demo/basic.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -83,7 +83,7 @@ exports[`renders ./components/auto-complete/demo/certain-category.md correctly 1
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -181,7 +181,7 @@ exports[`renders ./components/auto-complete/demo/custom.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -246,7 +246,7 @@ exports[`renders ./components/auto-complete/demo/non-case-sensitive.md correctly
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -318,7 +318,7 @@ exports[`renders ./components/auto-complete/demo/options.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -394,7 +394,7 @@ exports[`renders ./components/auto-complete/demo/uncertain-category.md correctly
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
diff --git a/components/badge/style/index.less b/components/badge/style/index.less
index d14ba5331a..2fe7fd496e 100644
--- a/components/badge/style/index.less
+++ b/components/badge/style/index.less
@@ -24,7 +24,7 @@
     font-weight: @badge-font-weight;
     white-space: nowrap;
     box-shadow: 0 0 0 1px @shadow-color-inverse;
-    z-index: 10;
+    z-index: @zindex-badge;
     a,
     a:hover {
       color: @badge-text-color;
@@ -40,8 +40,8 @@
     width: @badge-dot-size;
     border-radius: 100%;
     background: @highlight-color;
-    z-index: 10;
     box-shadow: 0 0 0 1px @shadow-color-inverse;
+    z-index: @zindex-badge;
   }
 
   &-count,
diff --git a/components/button/style/mixin.less b/components/button/style/mixin.less
index e2c5d5b2fa..3eee51e936 100644
--- a/components/button/style/mixin.less
+++ b/components/button/style/mixin.less
@@ -8,6 +8,7 @@
 }
 
 .button-disabled() {
+  &-disabled,
   &.disabled,
   &[disabled] {
     &,
@@ -54,7 +55,6 @@
         `
     );
   }
-
   &:active,
   &.active {
     .button-color(
@@ -62,52 +62,41 @@
         `
     );
   }
-
   .button-disabled();
 }
-
 .button-variant-danger(@color; @background; @border) {
   .button-color(@color; @background; @border);
-
   &:hover {
     .button-color(
       @btn-primary-color; ~`colorPalette('@{color}', 5) `; ~`colorPalette('@{color}', 5) `
     );
   }
-
   &:focus {
     .button-color(
       ~`colorPalette('@{color}', 5) `; @component-background; ~`colorPalette('@{color}', 5) `
     );
   }
-
   &:active,
   &.active {
     .button-color(
       @btn-primary-color; ~`colorPalette('@{color}', 7) `; ~`colorPalette('@{color}', 7) `
     );
   }
-
   .button-disabled();
 }
-
 .button-variant-ghost(@color) {
   .button-color(@color; transparent; @color);
   text-shadow: none;
-
   &:hover,
   &:focus {
     .button-color(~`colorPalette('@{color}', 5) `; transparent; ~`colorPalette('@{color}', 5) `);
   }
-
   &:active,
   &.active {
     .button-color(~`colorPalette('@{color}', 7) `; transparent; ~`colorPalette('@{color}', 7) `);
   }
-
   .button-disabled();
 }
-
 .button-color(@color; @background; @border) {
   color: @color;
   background-color: @background;
@@ -127,33 +116,28 @@
     }
   }
 }
-
 .button-group-base(@btnClassName) {
   position: relative;
   display: inline-block;
   > .@{btnClassName},
   > span > .@{btnClassName} {
     position: relative;
-
     &:hover,
     &:focus,
     &:active,
     &.active {
       z-index: 2;
     }
-
     &:disabled {
       z-index: 0;
     }
   }
-
   // size
   &-lg > .@{btnClassName},
   &-lg > span > .@{btnClassName} {
     .button-size(@btn-height-lg; @btn-padding-lg; @btn-font-size-lg; 0);
     line-height: @btn-height-lg - 2px;
   }
-
   &-sm > .@{btnClassName},
   &-sm > span > .@{btnClassName} {
     .button-size(@btn-height-sm; @btn-padding-sm; @font-size-base; 0);
@@ -163,7 +147,6 @@
     }
   }
 }
-
 // Base styles of buttons
 // --------------------------------------------------
 .btn() {
@@ -180,26 +163,21 @@
   transition: all 0.3s @ease-in-out;
   position: relative;
   box-shadow: 0 2px 0 rgba(0, 0, 0, 0.015);
-
   > .@{iconfont-css-prefix} {
     line-height: 1;
   }
-
   &,
   &:active,
   &:focus {
     outline: 0;
   }
-
   &:not([disabled]):hover {
     text-decoration: none;
   }
-
   &:not([disabled]):active {
     outline: 0;
     box-shadow: none;
   }
-
   &.disabled,
   &[disabled] {
     cursor: not-allowed;
@@ -207,21 +185,17 @@
       pointer-events: none;
     }
   }
-
   &-lg {
     .button-size(@btn-height-lg; @btn-padding-lg; @btn-font-size-lg; @btn-border-radius-base);
   }
-
   &-sm {
     .button-size(@btn-height-sm; @btn-padding-sm; @btn-font-size-sm; @btn-border-radius-sm);
   }
 }
-
 // primary button style
 .btn-primary() {
   .button-variant-primary(@btn-primary-color; @btn-primary-bg);
 }
-
 // default button style
 .btn-default() {
   .button-variant-other(@btn-default-color; @btn-default-bg; @btn-default-border);
@@ -233,44 +207,36 @@
     text-decoration: none;
   }
 }
-
 // ghost button style
 .btn-ghost() {
   .button-variant-other(@btn-ghost-color, @btn-ghost-bg, @btn-ghost-border);
 }
-
 // dashed button style
 .btn-dashed() {
   .button-variant-other(@btn-default-color, @btn-default-bg, @btn-default-border);
   border-style: dashed;
 }
-
 // danger button style
 .btn-danger() {
   .button-variant-danger(@btn-danger-color, @btn-danger-bg, @btn-danger-border);
 }
-
 // circle button: the content only contains icon
 .btn-circle(@btnClassName: btn) {
   .square(@btn-circle-size);
   .button-size(@btn-circle-size; 0; @font-size-base + 2px; 50%);
-
   &.@{btnClassName}-lg {
     .square(@btn-circle-size-lg);
     .button-size(@btn-circle-size-lg; 0; @btn-font-size-lg + 2px; 50%);
   }
-
   &.@{btnClassName}-sm {
     .square(@btn-circle-size-sm);
     .button-size(@btn-circle-size-sm; 0; @font-size-base; 50%);
   }
 }
-
 // Horizontal button groups styl
 // --------------------------------------------------
 .btn-group(@btnClassName: btn) {
   .button-group-base(@btnClassName);
-
   .@{btnClassName} + .@{btnClassName},
   .@{btnClassName} + &,
   span + .@{btnClassName},
@@ -280,15 +246,12 @@
   & + & {
     margin-left: -1px;
   }
-
   .@{btnClassName}-primary + .@{btnClassName}:not(.@{btnClassName}-primary):not([disabled]) {
     border-left-color: transparent;
   }
-
   .@{btnClassName} {
     border-radius: 0;
   }
-
   > .@{btnClassName}:first-child,
   > span:first-child > .@{btnClassName} {
     margin-left: 0;
@@ -299,19 +262,16 @@
   > span:only-child > .@{btnClassName} {
     border-radius: @btn-border-radius-base;
   }
-
   > .@{btnClassName}:first-child:not(:last-child),
   > span:first-child:not(:last-child) > .@{btnClassName} {
     border-bottom-left-radius: @btn-border-radius-base;
     border-top-left-radius: @btn-border-radius-base;
   }
-
   > .@{btnClassName}:last-child:not(:first-child),
   > span:last-child:not(:first-child) > .@{btnClassName} {
     border-bottom-right-radius: @btn-border-radius-base;
     border-top-right-radius: @btn-border-radius-base;
   }
-
   &-sm {
     > .@{btnClassName}:only-child {
       border-radius: @btn-border-radius-sm;
@@ -330,15 +290,12 @@
       border-top-right-radius: @btn-border-radius-sm;
     }
   }
-
   & > & {
     float: left;
   }
-
   & > &:not(:first-child):not(:last-child) > .@{btnClassName} {
     border-radius: 0;
   }
-
   & > &:first-child:not(:last-child) {
     > .@{btnClassName}:last-child {
       border-bottom-right-radius: 0;
@@ -346,7 +303,6 @@
       padding-right: 8px;
     }
   }
-
   & > &:last-child:not(:first-child) > .@{btnClassName}:first-child {
     border-bottom-left-radius: 0;
     border-top-left-radius: 0;
diff --git a/components/calendar/Header.tsx b/components/calendar/Header.tsx
index 491e2d4200..b4f07c775d 100644
--- a/components/calendar/Header.tsx
+++ b/components/calendar/Header.tsx
@@ -74,7 +74,8 @@ export default class Header extends React.Component<HeaderProps, any> {
       const currentYear = value.get('year');
       if (rangeEnd.get('year') === currentYear) {
         end = rangeEnd.get('month') + 1;
-      } else if (rangeStart.get('year') === currentYear) {
+      }
+      if (rangeStart.get('year') === currentYear) {
         start = rangeStart.get('month');
       }
     }
diff --git a/components/calendar/__tests__/__snapshots__/demo.test.js.snap b/components/calendar/__tests__/__snapshots__/demo.test.js.snap
index 67bbd53cd6..35f48df89a 100644
--- a/components/calendar/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/calendar/__tests__/__snapshots__/demo.test.js.snap
@@ -12,7 +12,7 @@ exports[`renders ./components/calendar/demo/basic.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -61,7 +61,7 @@ exports[`renders ./components/calendar/demo/basic.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -1055,7 +1055,7 @@ exports[`renders ./components/calendar/demo/card.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -1104,7 +1104,7 @@ exports[`renders ./components/calendar/demo/card.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -2096,7 +2096,7 @@ exports[`renders ./components/calendar/demo/notice-calendar.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -2145,7 +2145,7 @@ exports[`renders ./components/calendar/demo/notice-calendar.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -3547,7 +3547,7 @@ exports[`renders ./components/calendar/demo/select.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -3596,7 +3596,7 @@ exports[`renders ./components/calendar/demo/select.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
diff --git a/components/cascader/index.tsx b/components/cascader/index.tsx
index 12c6a900f1..eb62a95e79 100644
--- a/components/cascader/index.tsx
+++ b/components/cascader/index.tsx
@@ -188,7 +188,7 @@ function flattenTree(
   ancestor: CascaderOptionType[] = [],
 ) {
   const names: FilledFieldNamesType = getFilledFieldNames(props);
-  let flattenOptions = [] as CascaderOptionType[][];
+  let flattenOptions: CascaderOptionType[][] = [];
   const childrenName = names.children;
   options.forEach(option => {
     const path = ancestor.concat(option);
diff --git a/components/config-provider/__tests__/__snapshots__/index.test.js.snap b/components/config-provider/__tests__/__snapshots__/index.test.js.snap
index 850b7950c2..4c52148da1 100644
--- a/components/config-provider/__tests__/__snapshots__/index.test.js.snap
+++ b/components/config-provider/__tests__/__snapshots__/index.test.js.snap
@@ -162,7 +162,7 @@ exports[`ConfigProvider components AutoComplete configProvider 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="config-select-selection
@@ -226,7 +226,7 @@ exports[`ConfigProvider components AutoComplete normal 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -290,7 +290,7 @@ exports[`ConfigProvider components AutoComplete prefixCls 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="prefix-AutoComplete-selection
@@ -1165,7 +1165,7 @@ exports[`ConfigProvider components Calendar configProvider 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="config-select-selection
@@ -1214,7 +1214,7 @@ exports[`ConfigProvider components Calendar configProvider 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="config-select-selection
@@ -2202,7 +2202,7 @@ exports[`ConfigProvider components Calendar configProvider 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="config-select-selection
@@ -2558,7 +2558,7 @@ exports[`ConfigProvider components Calendar normal 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -2607,7 +2607,7 @@ exports[`ConfigProvider components Calendar normal 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -3595,7 +3595,7 @@ exports[`ConfigProvider components Calendar normal 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -3951,7 +3951,7 @@ exports[`ConfigProvider components Calendar prefixCls 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -4000,7 +4000,7 @@ exports[`ConfigProvider components Calendar prefixCls 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -4988,7 +4988,7 @@ exports[`ConfigProvider components Calendar prefixCls 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -8387,7 +8387,7 @@ exports[`ConfigProvider components Pagination configProvider 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="config-select-selection
@@ -8517,7 +8517,7 @@ exports[`ConfigProvider components Pagination configProvider 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="config-select-selection
@@ -8652,7 +8652,7 @@ exports[`ConfigProvider components Pagination normal 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -8782,7 +8782,7 @@ exports[`ConfigProvider components Pagination normal 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -8917,7 +8917,7 @@ exports[`ConfigProvider components Pagination prefixCls 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -9047,7 +9047,7 @@ exports[`ConfigProvider components Pagination prefixCls 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -10516,7 +10516,7 @@ Array [
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="true"
       aria-haspopup="true"
       class="config-select-selection
@@ -10557,7 +10557,7 @@ Array [
       class="config-select-dropdown config-select-dropdown--single config-select-dropdown-placement-bottomLeft "
     >
       <div
-        id="test-uuid"
+        id=""
         style="overflow:auto;transform:translateZ(0)"
       >
         <ul
@@ -10602,7 +10602,7 @@ Array [
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="true"
       aria-haspopup="true"
       class="ant-select-selection
@@ -10643,7 +10643,7 @@ Array [
       class="ant-select-dropdown ant-select-dropdown--single ant-select-dropdown-placement-bottomLeft "
     >
       <div
-        id="test-uuid"
+        id=""
         style="overflow:auto;transform:translateZ(0)"
       >
         <ul
@@ -10688,7 +10688,7 @@ Array [
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="true"
       aria-haspopup="true"
       class="prefix-Select-selection
@@ -10729,7 +10729,7 @@ Array [
       class="prefix-Select-dropdown prefix-Select-dropdown--single prefix-Select-dropdown-placement-bottomLeft "
     >
       <div
-        id="test-uuid"
+        id=""
         style="overflow:auto;transform:translateZ(0)"
       >
         <ul
diff --git a/components/date-picker/style/Calendar.less b/components/date-picker/style/Calendar.less
index c80b11d0e2..63a534090e 100644
--- a/components/date-picker/style/Calendar.less
+++ b/components/date-picker/style/Calendar.less
@@ -331,12 +331,6 @@
     .button-size(@btn-height-sm; @btn-padding-sm; @font-size-base; @border-radius-base);
     line-height: @btn-height-sm - 2px;
 
-    &-disabled {
-      .button-color(@btn-disable-color; @btn-disable-bg; @btn-disable-border);
-      cursor: not-allowed;
-      &:hover {
-        .button-color(@btn-disable-color; @btn-disable-bg; @btn-disable-border);
-      }
-    }
+    .button-disabled();
   }
 }
diff --git a/components/date-picker/style/DecadePanel.less b/components/date-picker/style/DecadePanel.less
index 063785124e..f2b4fa1ab5 100644
--- a/components/date-picker/style/DecadePanel.less
+++ b/components/date-picker/style/DecadePanel.less
@@ -6,7 +6,7 @@
   right: 0;
   bottom: 0;
   left: 0;
-  z-index: 10;
+  z-index: @zindex-picker-panel;
   background: @component-background;
   border-radius: @border-radius-base;
   outline: none;
diff --git a/components/date-picker/style/MonthPanel.less b/components/date-picker/style/MonthPanel.less
index b97c859d4f..e299e9d125 100644
--- a/components/date-picker/style/MonthPanel.less
+++ b/components/date-picker/style/MonthPanel.less
@@ -4,7 +4,7 @@
   right: 0;
   bottom: 0;
   left: 0;
-  z-index: 10;
+  z-index: @zindex-picker-panel;
   border-radius: @border-radius-base;
   background: @component-background;
   outline: none;
diff --git a/components/date-picker/style/YearPanel.less b/components/date-picker/style/YearPanel.less
index 63f49935ab..93424a7fcc 100644
--- a/components/date-picker/style/YearPanel.less
+++ b/components/date-picker/style/YearPanel.less
@@ -4,7 +4,7 @@
   right: 0;
   bottom: 0;
   left: 0;
-  z-index: 10;
+  z-index: @zindex-picker-panel;
   border-radius: @border-radius-base;
   background: @component-background;
   outline: none;
diff --git a/components/drawer/style/drawer.less b/components/drawer/style/drawer.less
index cce8c931c1..c4db387bd6 100644
--- a/components/drawer/style/drawer.less
+++ b/components/drawer/style/drawer.less
@@ -120,7 +120,7 @@
     position: absolute;
     right: 0;
     top: 0;
-    z-index: 10;
+    z-index: @zindex-popup-close;
     font-weight: 700;
     text-decoration: none;
     transition: color @animation-duration-slow;
diff --git a/components/empty/__tests__/__snapshots__/demo.test.js.snap b/components/empty/__tests__/__snapshots__/demo.test.js.snap
index 8c559ae1d2..d710756cfb 100644
--- a/components/empty/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/empty/__tests__/__snapshots__/demo.test.js.snap
@@ -49,7 +49,7 @@ exports[`renders ./components/empty/demo/config-provider.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
diff --git a/components/form/__tests__/__snapshots__/demo.test.js.snap b/components/form/__tests__/__snapshots__/demo.test.js.snap
index 3390bf5aa4..0230e577d2 100644
--- a/components/form/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/form/__tests__/__snapshots__/demo.test.js.snap
@@ -545,7 +545,7 @@ exports[`renders ./components/form/demo/coordinated.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -662,7 +662,7 @@ exports[`renders ./components/form/demo/customized-form-controls.md correctly 1`
             >
               <div
                 aria-autocomplete="list"
-                aria-controls="test-uuid"
+                aria-controls=""
                 aria-expanded="false"
                 aria-haspopup="true"
                 class="ant-select-selection
@@ -1784,7 +1784,7 @@ exports[`renders ./components/form/demo/register.md correctly 1`] = `
                 >
                   <div
                     aria-autocomplete="list"
-                    aria-controls="test-uuid"
+                    aria-controls=""
                     aria-expanded="false"
                     aria-haspopup="true"
                     class="ant-select-selection
@@ -1874,7 +1874,7 @@ exports[`renders ./components/form/demo/register.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -2551,7 +2551,7 @@ exports[`renders ./components/form/demo/validate-other.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -2630,7 +2630,7 @@ exports[`renders ./components/form/demo/validate-other.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -4179,7 +4179,7 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
diff --git a/components/input/__tests__/__snapshots__/demo.test.js.snap b/components/input/__tests__/__snapshots__/demo.test.js.snap
index ec4c661960..0b42e4b651 100644
--- a/components/input/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/input/__tests__/__snapshots__/demo.test.js.snap
@@ -47,7 +47,7 @@ exports[`renders ./components/input/demo/addon.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -106,7 +106,7 @@ exports[`renders ./components/input/demo/addon.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -286,7 +286,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -346,7 +346,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -517,7 +517,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -566,7 +566,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -620,7 +620,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -696,7 +696,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -746,7 +746,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -820,7 +820,7 @@ exports[`renders ./components/input/demo/group.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
diff --git a/components/locale-provider/__tests__/__snapshots__/demo.test.js.snap b/components/locale-provider/__tests__/__snapshots__/demo.test.js.snap
index 3fb2a41907..378f8f4d5a 100644
--- a/components/locale-provider/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/locale-provider/__tests__/__snapshots__/demo.test.js.snap
@@ -171,7 +171,7 @@ exports[`renders ./components/locale-provider/demo/all.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -227,7 +227,7 @@ exports[`renders ./components/locale-provider/demo/all.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
@@ -687,7 +687,7 @@ exports[`renders ./components/locale-provider/demo/all.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -736,7 +736,7 @@ exports[`renders ./components/locale-provider/demo/all.md correctly 1`] = `
           >
             <div
               aria-autocomplete="list"
-              aria-controls="test-uuid"
+              aria-controls=""
               aria-expanded="false"
               aria-haspopup="true"
               class="ant-select-selection
@@ -1930,7 +1930,7 @@ exports[`renders ./components/locale-provider/demo/basic.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
diff --git a/components/modal/style/modal.less b/components/modal/style/modal.less
index b1f8558451..63276faad1 100644
--- a/components/modal/style/modal.less
+++ b/components/modal/style/modal.less
@@ -45,7 +45,7 @@
     position: absolute;
     right: 0;
     top: 0;
-    z-index: 10;
+    z-index: @zindex-popup-close;
     font-weight: 700;
     line-height: 1;
     text-decoration: none;
diff --git a/components/notification/__tests__/__snapshots__/demo.test.js.snap b/components/notification/__tests__/__snapshots__/demo.test.js.snap
index bd359b8447..9ed34d2877 100644
--- a/components/notification/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/notification/__tests__/__snapshots__/demo.test.js.snap
@@ -52,7 +52,7 @@ exports[`renders ./components/notification/demo/placement.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
diff --git a/components/notification/index.tsx b/components/notification/index.tsx
index b20ab2ed3e..9134f11cdb 100755
--- a/components/notification/index.tsx
+++ b/components/notification/index.tsx
@@ -20,6 +20,7 @@ export interface ConfigProps {
   placement?: NotificationPlacement;
   getContainer?: () => HTMLElement;
 }
+
 function setNotificationConfig(options: ConfigProps) {
   const { duration, placement, bottom, top, getContainer } = options;
   if (duration !== undefined) {
@@ -121,6 +122,7 @@ export interface ArgsProps {
   readonly type?: IconType;
   onClick?: () => void;
 }
+
 function notice(args: ArgsProps) {
   const outerPrefixCls = args.prefixCls || 'ant-notification';
   const prefixCls = `${outerPrefixCls}-notice`;
@@ -206,4 +208,5 @@ export interface NotificationApi {
   config(options: ConfigProps): void;
   destroy(): void;
 }
+
 export default api as NotificationApi;
diff --git a/components/pagination/__tests__/__snapshots__/demo.test.js.snap b/components/pagination/__tests__/__snapshots__/demo.test.js.snap
index 4b10209398..c25144713d 100644
--- a/components/pagination/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/pagination/__tests__/__snapshots__/demo.test.js.snap
@@ -267,7 +267,7 @@ exports[`renders ./components/pagination/demo/changer.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
@@ -927,7 +927,7 @@ exports[`renders ./components/pagination/demo/mini.md correctly 1`] = `
       >
         <div
           aria-autocomplete="list"
-          aria-controls="test-uuid"
+          aria-controls=""
           aria-expanded="false"
           aria-haspopup="true"
           class="ant-select-selection
diff --git a/components/popover/style/index.less b/components/popover/style/index.less
index 20b07c682f..b454a6e62d 100644
--- a/components/popover/style/index.less
+++ b/components/popover/style/index.less
@@ -55,6 +55,14 @@
     background-clip: padding-box;
     border-radius: @border-radius-base;
     box-shadow: @box-shadow-base;
+    box-shadow: ~'0 0 8px @{shadow-color} \9';
+  }
+
+  @media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
+    /* IE10+ */
+    &-inner {
+      box-shadow: @box-shadow-base;
+    }
   }
 
   &-title {
diff --git a/components/select/__tests__/__snapshots__/demo.test.js.snap b/components/select/__tests__/__snapshots__/demo.test.js.snap
index eac74828b3..19c80015a2 100644
--- a/components/select/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/select/__tests__/__snapshots__/demo.test.js.snap
@@ -7,7 +7,7 @@ exports[`renders ./components/select/demo/automatic-tokenization.md correctly 1`
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -50,7 +50,7 @@ exports[`renders ./components/select/demo/basic.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -100,7 +100,7 @@ exports[`renders ./components/select/demo/basic.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -150,7 +150,7 @@ exports[`renders ./components/select/demo/basic.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -205,7 +205,7 @@ exports[`renders ./components/select/demo/coordinate.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -255,7 +255,7 @@ exports[`renders ./components/select/demo/coordinate.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -309,7 +309,7 @@ exports[`renders ./components/select/demo/custom-dropdown-menu.md correctly 1`]
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -362,7 +362,7 @@ exports[`renders ./components/select/demo/hide-selected.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -411,7 +411,7 @@ exports[`renders ./components/select/demo/label-in-value.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -464,7 +464,7 @@ exports[`renders ./components/select/demo/multiple.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -581,7 +581,7 @@ exports[`renders ./components/select/demo/optgroup.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -634,7 +634,7 @@ exports[`renders ./components/select/demo/search.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -706,7 +706,7 @@ exports[`renders ./components/select/demo/search-box.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -755,7 +755,7 @@ exports[`renders ./components/select/demo/select-users.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
@@ -869,7 +869,7 @@ exports[`renders ./components/select/demo/size.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -920,7 +920,7 @@ exports[`renders ./components/select/demo/size.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1035,7 +1035,7 @@ exports[`renders ./components/select/demo/size.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1154,7 +1154,7 @@ exports[`renders ./components/select/demo/suffix.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1204,7 +1204,7 @@ exports[`renders ./components/select/demo/suffix.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1258,7 +1258,7 @@ exports[`renders ./components/select/demo/tags.md correctly 1`] = `
 >
   <div
     aria-autocomplete="list"
-    aria-controls="test-uuid"
+    aria-controls=""
     aria-expanded="false"
     aria-haspopup="true"
     class="ant-select-selection
diff --git a/components/spin/__tests__/index.test.js b/components/spin/__tests__/index.test.js
index 38ca807a4e..354b2a6ce2 100644
--- a/components/spin/__tests__/index.test.js
+++ b/components/spin/__tests__/index.test.js
@@ -29,14 +29,45 @@ describe('Spin', () => {
     expect(wrapper).toMatchSnapshot();
   });
 
-  it("should render with delay when it's mounted with spinning=true and delay", () => {
-    const wrapper = mount(<Spin spinning delay={500} />);
-    expect(
-      wrapper
-        .find('.ant-spin')
-        .at(0)
-        .hasClass('ant-spin-spinning'),
-    ).toEqual(false);
+  describe('delay spinning', () => {
+    beforeAll(() => {
+      jest.useFakeTimers();
+    });
+
+    afterAll(() => {
+      jest.useRealTimers();
+    });
+
+    it("should render with delay when it's mounted with spinning=true and delay", () => {
+      const wrapper = mount(<Spin spinning delay={500} />);
+      expect(
+        wrapper
+          .find('.ant-spin')
+          .at(0)
+          .hasClass('ant-spin-spinning'),
+      ).toEqual(false);
+    });
+
+    it('should render when delay is init set', () => {
+      const wrapper = mount(<Spin spinning delay={100} />);
+
+      expect(
+        wrapper
+          .find('.ant-spin')
+          .at(0)
+          .hasClass('ant-spin-spinning'),
+      ).toEqual(false);
+
+      jest.runAllTimers();
+      wrapper.update();
+
+      expect(
+        wrapper
+          .find('.ant-spin')
+          .at(0)
+          .hasClass('ant-spin-spinning'),
+      ).toEqual(true);
+    });
   });
 
   it('should be controlled by spinning', () => {
diff --git a/components/spin/index.tsx b/components/spin/index.tsx
index 047b39adbc..560d408254 100644
--- a/components/spin/index.tsx
+++ b/components/spin/index.tsx
@@ -94,6 +94,10 @@ class Spin extends React.Component<SpinProps, SpinState> {
     return !!(this.props && this.props.children);
   }
 
+  componentDidMount() {
+    this.componentDidUpdate();
+  }
+
   componentWillUnmount() {
     if (this.debounceTimeout) {
       clearTimeout(this.debounceTimeout);
diff --git a/components/steps/style/compatibility.less b/components/steps/style/compatibility.less
new file mode 100644
index 0000000000..8e71d4fcb5
--- /dev/null
+++ b/components/steps/style/compatibility.less
@@ -0,0 +1,50 @@
+.@{steps-prefix-cls}-flex-not-supported {
+  &.@{steps-prefix-cls}-horizontal.@{steps-prefix-cls}-label-horizontal {
+    .@{steps-prefix-cls}-item {
+      background: @steps-background;
+      padding-left: 16px;
+      margin-left: -16px;
+    }
+
+    &.@{steps-prefix-cls}-small .@{steps-prefix-cls}-item {
+      padding-left: 12px;
+      margin-left: -12px;
+    }
+  }
+
+  &.@{steps-prefix-cls}-dot {
+    .@{steps-prefix-cls}-item {
+      &:last-child {
+        overflow: hidden;
+
+        .@{steps-prefix-cls}-icon-dot:after {
+          width: 200px;
+          right: -200px;
+        }
+      }
+
+      .@{steps-prefix-cls}-icon-dot:before,
+      .@{steps-prefix-cls}-icon-dot:after {
+        content: '';
+        position: absolute;
+        background: @steps-background;
+        width: 10px;
+        height: 8px;
+        top: 0;
+        left: -10px;
+      }
+
+      .@{steps-prefix-cls}-icon-dot:after {
+        left: auto;
+        right: -10px;
+      }
+    }
+
+    .@{steps-prefix-cls}-item-wait
+      .@{steps-prefix-cls}-item-icon
+      > .@{steps-prefix-cls}-icon
+      .@{steps-prefix-cls}-icon-dot {
+      background: #ccc;
+    }
+  }
+}
diff --git a/components/steps/style/index.less b/components/steps/style/index.less
index 61f689bc72..aa015212e5 100644
--- a/components/steps/style/index.less
+++ b/components/steps/style/index.less
@@ -186,3 +186,4 @@
 @import 'vertical';
 @import 'label-placement';
 @import 'progress-dot';
+@import 'compatibility';
diff --git a/components/style/themes/default.less b/components/style/themes/default.less
index 3c1808e33e..c06dfb2dd8 100644
--- a/components/style/themes/default.less
+++ b/components/style/themes/default.less
@@ -237,16 +237,20 @@
 @layout-trigger-background-light: #fff;
 @layout-trigger-color-light : @text-color;
 
-// z-index list
+// z-index list, order by `z-index`
 @zindex-affix : 10;
 @zindex-back-top : 10;
-@zindex-modal-mask : 1000;
+@zindex-badge : 10;
+@zindex-picker-panel : 10;
+@zindex-popup-close : 10;
+@zindex-table-fixed : 20;
 @zindex-modal : 1000;
-@zindex-notification : 1010;
+@zindex-modal-mask : 1000;
 @zindex-message : 1010;
+@zindex-notification : 1010;
 @zindex-popover : 1030;
-@zindex-picker : 1050;
 @zindex-dropdown : 1050;
+@zindex-picker : 1050;
 @zindex-tooltip : 1060;
 
 // Animation
diff --git a/components/table/Table.tsx b/components/table/Table.tsx
index bf2c07f2a3..9578b3b47d 100755
--- a/components/table/Table.tsx
+++ b/components/table/Table.tsx
@@ -64,6 +64,8 @@ const defaultPagination = {
   onShowSizeChange: noop,
 };
 
+const ROW_SELECTION_COLUMN_WIDTH = '62px';
+
 /**
  * Avoid creating new object, so that parent component's shouldComponentUpdate
  * can works appropriately。
@@ -745,7 +747,7 @@ export default class Table<T> extends React.Component<TableProps<T>, TableState<
         render: this.renderSelectionBox(rowSelection.type),
         className: selectionColumnClass,
         fixed: rowSelection.fixed,
-        width: rowSelection.columnWidth,
+        width: rowSelection.columnWidth || ROW_SELECTION_COLUMN_WIDTH,
         title: rowSelection.columnTitle,
       };
       if (rowSelection.type !== 'radio') {
diff --git a/components/table/__tests__/__snapshots__/Table.rowSelection.test.js.snap b/components/table/__tests__/__snapshots__/Table.rowSelection.test.js.snap
index a5fc17562a..b7e04f6afe 100644
--- a/components/table/__tests__/__snapshots__/Table.rowSelection.test.js.snap
+++ b/components/table/__tests__/__snapshots__/Table.rowSelection.test.js.snap
@@ -26,7 +26,9 @@ exports[`Table.rowSelection fix selection column on the left 1`] = `
                 class=""
               >
                 <colgroup>
-                  <col />
+                  <col
+                    style="width:62px;min-width:62px"
+                  />
                   <col />
                 </colgroup>
                 <thead
@@ -228,7 +230,9 @@ exports[`Table.rowSelection fix selection column on the left 1`] = `
                   class="ant-table-fixed"
                 >
                   <colgroup>
-                    <col />
+                    <col
+                      style="width:62px;min-width:62px"
+                    />
                   </colgroup>
                   <thead
                     class="ant-table-thead"
diff --git a/components/table/__tests__/__snapshots__/demo.test.js.snap b/components/table/__tests__/__snapshots__/demo.test.js.snap
index 8a5df56d8e..ea820dc37e 100755
--- a/components/table/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/table/__tests__/__snapshots__/demo.test.js.snap
@@ -2080,7 +2080,9 @@ exports[`renders ./components/table/demo/dynamic-settings.md correctly 1`] = `
                   <col
                     class="ant-table-expand-icon-col"
                   />
-                  <col />
+                  <col
+                    style="width:62px;min-width:62px"
+                  />
                   <col
                     style="width:150px;min-width:150px"
                   />
@@ -4288,7 +4290,9 @@ exports[`renders ./components/table/demo/expand-children.md correctly 1`] = `
               class=""
             >
               <colgroup>
-                <col />
+                <col
+                  style="width:62px;min-width:62px"
+                />
                 <col />
                 <col
                   style="width:12%;min-width:12%"
@@ -10934,7 +10938,9 @@ exports[`renders ./components/table/demo/row-selection.md correctly 1`] = `
               class=""
             >
               <colgroup>
-                <col />
+                <col
+                  style="width:62px;min-width:62px"
+                />
                 <col />
                 <col />
                 <col />
@@ -11313,7 +11319,9 @@ exports[`renders ./components/table/demo/row-selection-and-operation.md correctl
                 class=""
               >
                 <colgroup>
-                  <col />
+                  <col
+                    style="width:62px;min-width:62px"
+                  />
                   <col />
                   <col />
                   <col />
@@ -11962,7 +11970,9 @@ exports[`renders ./components/table/demo/row-selection-custom.md correctly 1`] =
               class=""
             >
               <colgroup>
-                <col />
+                <col
+                  style="width:62px;min-width:62px"
+                />
                 <col />
                 <col />
                 <col />
diff --git a/components/table/demo/fixed-columns-header.md b/components/table/demo/fixed-columns-header.md
index 891b90fa55..52e61fe93a 100644
--- a/components/table/demo/fixed-columns-header.md
+++ b/components/table/demo/fixed-columns-header.md
@@ -9,7 +9,7 @@ title:
 
 适合同时展示有大量数据和数据列。
 
-> 若列头与内容不对齐或出现列重复，请指定列的宽度 `width`。
+> 若列头与内容不对齐或出现列重复，请指定**固定列**的宽度 `width`。
 >
 > 建议指定 `scroll.x` 为大于表格宽度的固定值或百分比。注意，且非固定列宽度之和不要超过 `scroll.x`。
 
@@ -17,7 +17,7 @@ title:
 
 A Solution for displaying large amounts of data with long columns.
 
-> Specify the width of columns if header and cell do not align properly.
+> Specify the width of columns if header and cell do not align properly. (Leave one column at least without width to fit fluid layout)
 >
 > A fixed value which is greater than table width for `scroll.x` is recommended. The sum of unfixed columns should not greater than `scroll.x`.
 
diff --git a/components/table/demo/fixed-columns.md b/components/table/demo/fixed-columns.md
index 49812d2fcb..f15cdbb084 100644
--- a/components/table/demo/fixed-columns.md
+++ b/components/table/demo/fixed-columns.md
@@ -9,7 +9,7 @@ title:
 
 对于列数很多的数据，可以固定前后的列，横向滚动查看其它数据，需要和 `scroll.x` 配合使用。
 
-> 若列头与内容不对齐或出现列重复，请指定列的宽度 `width`。
+> 若列头与内容不对齐或出现列重复，请指定**固定列**的宽度 `width`。
 >
 > 建议指定 `scroll.x` 为大于表格宽度的固定值或百分比。注意，且非固定列宽度之和不要超过 `scroll.x`。
 
@@ -17,7 +17,7 @@ title:
 
 To fix some columns and scroll inside other columns, and you must set `scroll.x` meanwhile.
 
-> Specify the width of columns if header and cell do not align properly.
+> Specify the width of columns if header and cell do not align properly. (Leave one column at least without width to fit fluid layout)
 >
 > A fixed value which is greater than table width for `scroll.x` is recommended. The sum of unfixed columns should not greater than `scroll.x`.
 
diff --git a/components/table/demo/fixed-header.md b/components/table/demo/fixed-header.md
index 174a63c197..5f3bf6acdb 100644
--- a/components/table/demo/fixed-header.md
+++ b/components/table/demo/fixed-header.md
@@ -9,13 +9,13 @@ title:
 
 方便一页内展示大量数据。
 
-需要指定 column 的 `width` 属性，否则列头和内容可能不对齐。
+需要指定 column 的 `width` 属性，否则列头和内容可能不对齐。（建议留一列不设宽度以适应弹性布局）
 
 ## en-US
 
 Display large amounts of data in scrollable view.
 
-> Specify the width of each column if header and cell do not align properly.
+> Specify width of columns if header and cell do not align properly. (Leave one column at least without width to fit fluid layout)
 
 ````jsx
 import { Table } from 'antd';
diff --git a/components/table/index.zh-CN.md b/components/table/index.zh-CN.md
index bb83332aee..4c3f0dedfa 100644
--- a/components/table/index.zh-CN.md
+++ b/components/table/index.zh-CN.md
@@ -78,7 +78,7 @@ const columns = [{
 | rowSelection | 表格行是否可选择，[配置项](#rowSelection) | object | null |
 | scroll | 设置横向或纵向滚动，也可用于指定滚动区域的宽和高，建议为 `x` 设置一个数字，如果要设置为 `true`，需要配合样式 `.ant-table td { white-space: nowrap; }` | { x: number \| true, y: number } | - |
 | showHeader | 是否显示表头 | boolean | true |
-| size | 正常或迷你类型，`default` \| `middle` \| `small` | string | default |
+| size | 表格大小 | default \| middle \| small | default |
 | title | 表格标题 | Function(currentPageData) |  |
 | onChange | 分页、排序、筛选变化时触发 | Function(pagination, filters, sorter, extra: { currentDataSource: [] }) |  |
 | onExpand | 点击展开图标时触发 | Function(expanded, record) |  |
diff --git a/components/table/style/index.less b/components/table/style/index.less
index 63cd6e1654..74611ee9a1 100644
--- a/components/table/style/index.less
+++ b/components/table/style/index.less
@@ -294,8 +294,6 @@
   &-thead > tr > th.@{table-prefix-cls}-selection-column,
   &-tbody > tr > td.@{table-prefix-cls}-selection-column {
     text-align: center;
-    min-width: 62px;
-    width: 62px;
     .@{ant-prefix}-radio-wrapper {
       margin-right: 0;
     }
@@ -596,6 +594,7 @@
     overflow: hidden;
     transition: box-shadow 0.3s ease;
     border-radius: 0;
+    z-index: @zindex-table-fixed;
     table {
       width: auto;
       background: @component-background;
diff --git a/components/tabs/__tests__/__snapshots__/demo.test.js.snap b/components/tabs/__tests__/__snapshots__/demo.test.js.snap
index 9579ea7b79..18ab77b4d2 100644
--- a/components/tabs/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/tabs/__tests__/__snapshots__/demo.test.js.snap
@@ -1534,7 +1534,7 @@ exports[`renders ./components/tabs/demo/nest.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1576,7 +1576,7 @@ exports[`renders ./components/tabs/demo/nest.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1618,7 +1618,7 @@ exports[`renders ./components/tabs/demo/nest.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -1660,7 +1660,7 @@ exports[`renders ./components/tabs/demo/nest.md correctly 1`] = `
   >
     <div
       aria-autocomplete="list"
-      aria-controls="test-uuid"
+      aria-controls=""
       aria-expanded="false"
       aria-haspopup="true"
       class="ant-select-selection
@@ -2216,7 +2216,7 @@ exports[`renders ./components/tabs/demo/position.md correctly 1`] = `
     >
       <div
         aria-autocomplete="list"
-        aria-controls="test-uuid"
+        aria-controls=""
         aria-expanded="false"
         aria-haspopup="true"
         class="ant-select-selection
diff --git a/components/time-picker/style/index.less b/components/time-picker/style/index.less
index b31cab2f9c..64925aefa7 100644
--- a/components/time-picker/style/index.less
+++ b/components/time-picker/style/index.less
@@ -207,6 +207,7 @@
 
   &-icon {
     position: absolute;
+    z-index: 1;
     user-select: none;
     transition: all 0.3s @ease-in-out;
     width: 14px;
diff --git a/components/timeline/style/index.less b/components/timeline/style/index.less
index 82f8ea1549..09d6e53e26 100644
--- a/components/timeline/style/index.less
+++ b/components/timeline/style/index.less
@@ -77,10 +77,10 @@
     }
 
     &-last {
-      .@{timeline-prefix-cls}-item-tail {
+      > .@{timeline-prefix-cls}-item-tail {
         display: none;
       }
-      .@{timeline-prefix-cls}-item-content {
+      > .@{timeline-prefix-cls}-item-content {
         min-height: 48px;
       }
     }
diff --git a/components/upload/index.en-US.md b/components/upload/index.en-US.md
index 4bd57fa824..1ac8664679 100644
--- a/components/upload/index.en-US.md
+++ b/components/upload/index.en-US.md
@@ -16,8 +16,6 @@ Uploading is the process of publishing information (web pages, text, pictures, v
 
 ## API
 
-> You can consult [jQuery-File-Upload](https://github.com/blueimp/jQuery-File-Upload/wiki) about how to implement server side upload interface.
-
 | Property | Description | Type | Default |
 | -------- | ----------- | ---- | ------- |
 | accept | File types that can be accepted. See [input accept Attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#accept) | string | - |
@@ -43,7 +41,7 @@ Uploading is the process of publishing information (web pages, text, pictures, v
 
 ### onChange
 
-> The function will be called when uploading is in progress, completed or failed
+> The function will be called when uploading is in progress, completed or failed.
 
 When uploading state change, it returns:
 
@@ -70,14 +68,21 @@ When uploading state change, it returns:
 2. `fileList` current list of files
 3. `event` response from server, including uploading progress, supported by advanced browsers.
 
-## show download links
+## FAQ
+
+### How to implement upload server side?
+
+- You can consult [jQuery-File-Upload](https://github.com/blueimp/jQuery-File-Upload/wiki#server-side) about how to implement server side upload interface.
+- There is a mock example of [express](https://github.com/react-component/upload/blob/master/server.js) in rc-upload.
+
+### I want to display download links.
 
-Please set property `url` of property `fileList` to control content of link
+Please set property `url` of each item in `fileList` to control content of link.
 
-## customRequest
+### How to use `customRequest`?
 
-- <https://github.com/react-component/upload#customrequest>
+See <https://github.com/react-component/upload#customrequest>.
 
-## IE note
+### IE8/9 Note
 
-- <https://github.com/react-component/upload#ie89-note>
+See <https://github.com/react-component/upload#ie89-note>.
diff --git a/components/upload/index.zh-CN.md b/components/upload/index.zh-CN.md
index 032d56379a..e0ca50e531 100644
--- a/components/upload/index.zh-CN.md
+++ b/components/upload/index.zh-CN.md
@@ -17,8 +17,6 @@ title: Upload
 
 ## API
 
-> 服务端上传接口实现可以参考 [jQuery-File-Upload](https://github.com/blueimp/jQuery-File-Upload/wiki)。
-
 | 参数 | 说明 | 类型 | 默认值 |
 | --- | --- | --- | --- |
 | accept | 接受上传的文件类型, 详见 [input accept Attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#accept) | string | 无 |
@@ -71,14 +69,21 @@ title: Upload
 2. `fileList` 当前的文件列表。
 3. `event` 上传中的服务端响应内容，包含了上传进度等信息，高级浏览器支持。
 
-## 显示下载链接
+## FAQ
+
+### 服务端如何实现？
+
+- 服务端上传接口实现可以参考 [jQuery-File-Upload](https://github.com/blueimp/jQuery-File-Upload/wiki#server-side)。
+- 如果要做本地 mock 可以参考这个 [express 的例子](https://github.com/react-component/upload/blob/master/server.js)。
+
+### 如何显示下载链接？
 
 请使用 fileList 属性设置数组项的 url 属性进行展示控制。
 
-## customRequest
+### `customRequest` 怎么使用？
 
-- <https://github.com/react-component/upload#customrequest>
+请参考 <https://github.com/react-component/upload#customrequest>。
 
-## IE note
+### IE8/9 问题
 
-- <https://github.com/react-component/upload#ie89-note>
+请参考 <https://github.com/react-component/upload#ie89-note>。
diff --git a/site/theme/static/footer.less b/site/theme/static/footer.less
index 1ea525bdee..23dd463d13 100644
--- a/site/theme/static/footer.less
+++ b/site/theme/static/footer.less
@@ -7,7 +7,7 @@ footer {
   font-size: 14px;
   background-color: #000;
   position: relative;
-  z-index: 100;
+  z-index: 9;
   margin-left: -1px;
   color: rgba(255, 255, 255, 0.65);
 
diff --git a/site/theme/static/toc.less b/site/theme/static/toc.less
index 827510342c..98992c303f 100644
--- a/site/theme/static/toc.less
+++ b/site/theme/static/toc.less
@@ -52,8 +52,10 @@ ul.toc > li {
     background: #fff;
     overflow: auto;
     max-height: ~'calc(100vh - 16px)';
+    z-index: 9;
   }
 }
+
 .toc-affix-bottom {
   position: absolute;
   bottom: 88px;