merge feature into master

components/_util/motion.tsx

@@ -3,7 +3,10 @@ import { MotionEvent } from 'rc-motion/lib/interface';
 
 // ================== Collapse Motion ==================
 const getCollapsedHeight: MotionEventHandler = () => ({ height: 0, opacity: 0 });
-const getRealHeight: MotionEventHandler = node => ({ height: node.scrollHeight, opacity: 1 });
+const getRealHeight: MotionEventHandler = node => {
+  const { scrollHeight } = node;
+  return { height: scrollHeight, opacity: 1 };
+};
 const getCurrentHeight: MotionEventHandler = node => ({ height: node.offsetHeight });
 const skipOpacityTransition: MotionEndEventHandler = (_, event: MotionEvent) =>
   event?.deadline === true || (event as TransitionEvent).propertyName === 'height';

components/config-provider/__tests__/__snapshots__/components.test.js.snap

@@ -13272,9 +13272,10 @@ exports[`ConfigProvider components Form configProvider 1`] = `
         </div>
       </div>
       <div
-        class="config-form-item-explain config-form-item-explain-error"
+        class="config-form-item-explain"
       >
         <div
+          class="config-form-item-explain-error"
           role="alert"
         >
           Bamboo is Light
@@ -13309,9 +13310,10 @@ exports[`ConfigProvider components Form configProvider componentSize large 1`] =
         </div>
       </div>
       <div
-        class="config-form-item-explain config-form-item-explain-error"
+        class="config-form-item-explain"
       >
         <div
+          class="config-form-item-explain-error"
           role="alert"
         >
           Bamboo is Light
@@ -13346,9 +13348,10 @@ exports[`ConfigProvider components Form configProvider componentSize middle 1`]
         </div>
       </div>
       <div
-        class="config-form-item-explain config-form-item-explain-error"
+        class="config-form-item-explain"
       >
         <div
+          class="config-form-item-explain-error"
           role="alert"
         >
           Bamboo is Light
@@ -13383,9 +13386,10 @@ exports[`ConfigProvider components Form configProvider virtual and dropdownMatch
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Bamboo is Light
@@ -13420,9 +13424,10 @@ exports[`ConfigProvider components Form normal 1`] = `
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Bamboo is Light
@@ -13457,9 +13462,10 @@ exports[`ConfigProvider components Form prefixCls 1`] = `
         </div>
       </div>
       <div
-        class="prefix-Form-item-explain prefix-Form-item-explain-error"
+        class="prefix-Form-item-explain"
       >
         <div
+          class="prefix-Form-item-explain-error"
           role="alert"
         >
           Bamboo is Light

components/form/ErrorList.tsx

@@ -1,97 +1,114 @@
 import * as React from 'react';
 import classNames from 'classnames';
-import CSSMotion from 'rc-motion';
+import CSSMotion, { CSSMotionList } from 'rc-motion';
-import useMemo from 'rc-util/lib/hooks/useMemo';
-import useCacheErrors from './hooks/useCacheErrors';
-import useForceUpdate from '../_util/hooks/useForceUpdate';
 import { FormItemPrefixContext } from './context';
 import { ConfigContext } from '../config-provider';
+import { ValidateStatus } from './FormItem';
+import collapseMotion from '../_util/motion';
 
 const EMPTY_LIST: React.ReactNode[] = [];
 
+interface ErrorEntity {
+  error: React.ReactNode;
+  errorStatus?: ValidateStatus;
+  key: string;
+}
+
+function toErrorEntity(
+  error: React.ReactNode,
+  errorStatus: ValidateStatus | undefined,
+  prefix: string,
+  index: number = 0,
+): ErrorEntity {
+  return {
+    key: typeof error === 'string' ? error : `${prefix}-${index}`,
+    error,
+    errorStatus,
+  };
+}
+
 export interface ErrorListProps {
-  errors?: React.ReactNode[];
-  /** @private Internal Usage. Do not use in your production */
   help?: React.ReactNode;
-  /** @private Internal Usage. Do not use in your production */
+  helpStatus?: ValidateStatus;
-  onDomErrorVisibleChange?: (visible: boolean) => void;
+  errors?: React.ReactNode[];
+  warnings?: React.ReactNode[];
 }
 
 export default function ErrorList({
-  errors = EMPTY_LIST,
   help,
-  onDomErrorVisibleChange,
+  helpStatus,
+  errors = EMPTY_LIST,
+  warnings = EMPTY_LIST,
 }: ErrorListProps) {
-  const forceUpdate = useForceUpdate();
+  const { prefixCls } = React.useContext(FormItemPrefixContext);
-  const { prefixCls, status } = React.useContext(FormItemPrefixContext);
   const { getPrefixCls } = React.useContext(ConfigContext);
 
-  const [visible, cacheErrors] = useCacheErrors(
-    errors,
-    changedVisible => {
-      if (changedVisible) {
-        /**
-         * We trigger in sync to avoid dom shaking but this get warning in react 16.13.
-         *
-         * So use Promise to keep in micro async to handle this.
-         * https://github.com/ant-design/ant-design/issues/21698#issuecomment-593743485
-         */
-        Promise.resolve().then(() => {
-          onDomErrorVisibleChange?.(true);
-        });
-      }
-      forceUpdate();
-    },
-    !!help,
-  );
-
-  const memoErrors = useMemo(
-    () => cacheErrors,
-    visible,
-    (_, nextVisible) => nextVisible,
-  );
-
-  // Memo status in same visible
-  const [innerStatus, setInnerStatus] = React.useState(status);
-  React.useEffect(() => {
-    if (visible && status) {
-      setInnerStatus(status);
-    }
-  }, [visible, status]);
-
   const baseClassName = `${prefixCls}-item-explain`;
   const rootPrefixCls = getPrefixCls();
 
+  const fullKeyList = React.useMemo(() => {
+    if (help !== undefined && help !== null) {
+      return [toErrorEntity(help, helpStatus, 'help')];
+    }
+
+    return [
+      ...errors.map((error, index) => toErrorEntity(error, 'error', 'error', index)),
+      ...warnings.map((warning, index) => toErrorEntity(warning, 'warning', 'warning', index)),
+    ];
+  }, [help, helpStatus, errors, warnings]);
+
   return (
     <CSSMotion
-      motionDeadline={500}
+      {...collapseMotion}
-      visible={visible}
       motionName={`${rootPrefixCls}-show-help`}
-      onLeaveEnd={() => {
+      motionAppear={false}
-        onDomErrorVisibleChange?.(false);
+      motionEnter={false}
-      }}
+      motionLeave
-      motionAppear
+      visible={!!fullKeyList.length}
       removeOnLeave
+      onLeaveStart={node => {
+        // Force disable css override style in index.less configured
+        node.style.height = 'auto';
+        return { height: node.offsetHeight };
+      }}
     >
-      {({ className: motionClassName }: { className?: string }) => (
+      {holderProps => {
+        const { className: holderClassName, style: holderStyle } = holderProps;
+
+        return (
+          <div className={classNames(baseClassName, holderClassName)} style={holderStyle}>
+            <CSSMotionList
+              keys={fullKeyList}
+              {...collapseMotion}
+              motionName={`${rootPrefixCls}-show-help-item`}
+              component={false}
+            >
+              {itemProps => {
+                const {
+                  key,
+                  error,
+                  errorStatus,
+                  className: itemClassName,
+                  style: itemStyle,
+                } = itemProps;
+
+                return (
                   <div
-          className={classNames(
+                    key={key}
-            baseClassName,
+                    role="alert"
-            {
+                    className={classNames(itemClassName, {
-              [`${baseClassName}-${innerStatus}`]: innerStatus,
+                      [`${baseClassName}-${errorStatus}`]: errorStatus,
-            },
+                    })}
-            motionClassName,
+                    style={itemStyle}
-          )}
-          key="help"
                   >
-          {memoErrors.map((error, index) => (
-            // eslint-disable-next-line react/no-array-index-key
-            <div key={index} role="alert">
                     {error}
                   </div>
-          ))}
+                );
+              }}
+            </CSSMotionList>
           </div>
-      )}
+        );
+      }}
     </CSSMotion>
   );
 }

components/form/FormItem.tsx

@@ -1,6 +1,5 @@
 import * as React from 'react';
-import { useContext, useRef } from 'react';
+import { useContext } from 'react';
-import isEqual from 'lodash/isEqual';
 import classNames from 'classnames';
 import { Field, FormInstance } from 'rc-field-form';
 import { FieldProps } from 'rc-field-form/lib/Field';
@@ -14,14 +13,20 @@ import { tuple } from '../_util/type';
 import devWarning from '../_util/devWarning';
 import FormItemLabel, { FormItemLabelProps, LabelTooltipType } from './FormItemLabel';
 import FormItemInput, { FormItemInputProps } from './FormItemInput';
-import { FormContext, FormItemContext } from './context';
+import { FormContext, NoStyleItemContext } from './context';
 import { toArray, getFieldId } from './util';
 import { cloneElement, isValidElement } from '../_util/reactNode';
 import useFrameState from './hooks/useFrameState';
+import useDebounce from './hooks/useDebounce';
 import useItemRef from './hooks/useItemRef';
 
 const NAME_SPLIT = '__SPLIT__';
 
+interface FieldError {
+  errors: string[];
+  warnings: string[];
+}
+
 const ValidateStatuses = tuple('success', 'warning', 'error', 'validating', '');
 export type ValidateStatus = typeof ValidateStatuses[number];
 
@@ -31,7 +36,7 @@ type ChildrenType<Values = any> = RenderChildren<Values> | React.ReactNode;
 
 interface MemoInputProps {
   value: any;
-  update: number;
+  update: any;
   children: React.ReactNode;
 }
 
@@ -68,6 +73,16 @@ function hasValidName(name?: NamePath): Boolean {
   return !(name === undefined || name === null);
 }
 
+function genEmptyMeta(): Meta {
+  return {
+    errors: [],
+    warnings: [],
+    touched: false,
+    validating: false,
+    name: [],
+  };
+}
+
 function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElement {
   const {
     name,
@@ -91,104 +106,109 @@ function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElemen
     hidden,
     ...restProps
   } = props;
-  const destroyRef = useRef(false);
   const { getPrefixCls } = useContext(ConfigContext);
   const { name: formName, requiredMark } = useContext(FormContext);
-  const { updateItemErrors } = useContext(FormItemContext);
+  const isRenderProps = typeof children === 'function';
-  const [domErrorVisible, innerSetDomErrorVisible] = React.useState(!!help);
+  const notifyParentMetaChange = useContext(NoStyleItemContext);
-  const [inlineErrors, setInlineErrors] = useFrameState<Record<string, string[]>>({});
 
   const { validateTrigger: contextValidateTrigger } = useContext(FieldContext);
   const mergedValidateTrigger =
     validateTrigger !== undefined ? validateTrigger : contextValidateTrigger;
 
-  function setDomErrorVisible(visible: boolean) {
-    if (!destroyRef.current) {
-      innerSetDomErrorVisible(visible);
-    }
-  }
-
   const hasName = hasValidName(name);
 
-  // Cache Field NamePath
-  const nameRef = useRef<(string | number)[]>([]);
-
-  // Should clean up if Field removed
-  React.useEffect(
-    () => () => {
-      destroyRef.current = true;
-      updateItemErrors(nameRef.current.join(NAME_SPLIT), []);
-    },
-    [],
-  );
-
   const prefixCls = getPrefixCls('form', customizePrefixCls);
 
   // ======================== Errors ========================
-  // Collect noStyle Field error to the top FormItem
+  // >>>>> Collect sub field errors
-  const updateChildItemErrors = noStyle
+  const [subFieldErrors, setSubFieldErrors] = useFrameState<Record<string, FieldError>>({});
-    ? updateItemErrors
+
-    : (subName: string, subErrors: string[], originSubName?: string) => {
+  // >>>>> Current field errors
-        setInlineErrors((prevInlineErrors = {}) => {
+  const [meta, setMeta] = React.useState<Meta>(() => genEmptyMeta());
-          // Clean up origin error when name changed
+
-          if (originSubName && originSubName !== subName) {
+  const onMetaChange = (nextMeta: Meta & { destroy?: boolean }) => {
-            delete prevInlineErrors[originSubName];
+    // Destroy will reset all the meta
+    setMeta(nextMeta.destroy ? genEmptyMeta() : nextMeta);
+
+    // Bump to parent since noStyle
+    if (noStyle && notifyParentMetaChange) {
+      let namePath = nextMeta.name;
+      if (fieldKey !== undefined) {
+        namePath = Array.isArray(fieldKey) ? fieldKey : [fieldKey!];
+      }
+      notifyParentMetaChange(nextMeta, namePath);
+    }
+  };
+
+  // >>>>> Collect noStyle Field error to the top FormItem
+  const onSubItemMetaChange = (subMeta: Meta & { destroy: boolean }, uniqueKeys: React.Key[]) => {
+    // Only `noStyle` sub item will trigger
+    setSubFieldErrors(prevSubFieldErrors => {
+      const clone = {
+        ...prevSubFieldErrors,
+      };
+
+      // name: ['user', 1] + key: [4] = ['user', 4]
+      const mergedNamePath = [...subMeta.name.slice(0, -1), ...uniqueKeys];
+      const mergedNameKey = mergedNamePath.join(NAME_SPLIT);
+
+      if (subMeta.destroy) {
+        // Remove
+        delete clone[mergedNameKey];
+      } else {
+        // Update
+        clone[mergedNameKey] = subMeta;
       }
 
-          if (!isEqual(prevInlineErrors[subName], subErrors)) {
+      return clone;
-            return {
-              ...prevInlineErrors,
-              [subName]: subErrors,
-            };
-          }
-          return prevInlineErrors;
     });
   };
 
+  // >>>>> Get merged errors
+  const [mergedErrors, mergedWarnings] = React.useMemo(() => {
+    const errorList: string[] = [...meta.errors];
+    const warningList: string[] = [...meta.warnings];
+
+    Object.values(subFieldErrors).forEach(subFieldError => {
+      errorList.push(...(subFieldError.errors || []));
+      warningList.push(...(subFieldError.warnings || []));
+    });
+
+    return [errorList, warningList];
+  }, [subFieldErrors, meta.errors, meta.warnings]);
+
+  const debounceErrors = useDebounce(mergedErrors);
+  const debounceWarnings = useDebounce(mergedWarnings);
+
   // ===================== Children Ref =====================
   const getItemRef = useItemRef();
 
+  // ======================== Render ========================
   function renderLayout(
     baseChildren: React.ReactNode,
     fieldId?: string,
-    meta?: Meta,
     isRequired?: boolean,
   ): React.ReactNode {
     if (noStyle && !hidden) {
       return baseChildren;
     }
-
-    // ======================== Errors ========================
-    // >>> collect sub errors
-    let subErrorList: string[] = [];
-    Object.keys(inlineErrors).forEach(subName => {
-      subErrorList = [...subErrorList, ...(inlineErrors[subName] || [])];
-    });
-
-    // >>> merged errors
-    let mergedErrors: React.ReactNode[];
-    if (help !== undefined && help !== null) {
-      mergedErrors = toArray(help);
-    } else {
-      mergedErrors = meta ? meta.errors : [];
-      mergedErrors = [...mergedErrors, ...subErrorList];
-    }
-
     // ======================== Status ========================
     let mergedValidateStatus: ValidateStatus = '';
     if (validateStatus !== undefined) {
       mergedValidateStatus = validateStatus;
     } else if (meta?.validating) {
       mergedValidateStatus = 'validating';
-    } else if (meta?.errors?.length || subErrorList.length) {
+    } else if (debounceErrors.length) {
       mergedValidateStatus = 'error';
+    } else if (debounceWarnings.length) {
+      mergedValidateStatus = 'warning';
     } else if (meta?.touched) {
       mergedValidateStatus = 'success';
     }
 
     const itemClassName = {
       [`${prefixCls}-item`]: true,
-      [`${prefixCls}-item-with-help`]: domErrorVisible || !!help,
+      [`${prefixCls}-item-with-help`]: help || debounceErrors.length || debounceWarnings.length,
       [`${className}`]: !!className,
 
       // Status
@@ -238,26 +258,21 @@ function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElemen
         <FormItemInput
           {...props}
           {...meta}
-          errors={mergedErrors}
+          errors={debounceErrors}
+          warnings={debounceWarnings}
           prefixCls={prefixCls}
           status={mergedValidateStatus}
-          onDomErrorVisibleChange={setDomErrorVisible}
           validateStatus={mergedValidateStatus}
+          help={help}
         >
-          <FormItemContext.Provider value={{ updateItemErrors: updateChildItemErrors }}>
+          <NoStyleItemContext.Provider value={onSubItemMetaChange}>
             {baseChildren}
-          </FormItemContext.Provider>
+          </NoStyleItemContext.Provider>
         </FormItemInput>
       </Row>
     );
   }
 
-  const isRenderProps = typeof children === 'function';
-
-  // Record for real component render
-  const updateRef = useRef(0);
-  updateRef.current += 1;
-
   if (!hasName && !isRenderProps && !dependencies) {
     return renderLayout(children) as JSX.Element;
   }
@@ -270,46 +285,31 @@ function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElemen
     variables = { ...variables, ...messageVariables };
   }
 
+  // >>>>> With Field
   return (
     <Field
       {...props}
       messageVariables={variables}
       trigger={trigger}
       validateTrigger={mergedValidateTrigger}
-      onReset={() => {
+      onMetaChange={onMetaChange}
-        setDomErrorVisible(false);
-      }}
     >
-      {(control, meta, context) => {
+      {(control, renderMeta, context) => {
-        const { errors } = meta;
+        const mergedName = toArray(name).length && renderMeta ? renderMeta.name : [];
-
-        const mergedName = toArray(name).length && meta ? meta.name : [];
         const fieldId = getFieldId(mergedName, formName);
 
-        if (noStyle) {
-          // Clean up origin one
-          const originErrorName = nameRef.current.join(NAME_SPLIT);
-
-          nameRef.current = [...mergedName];
-          if (fieldKey) {
-            const fieldKeys = Array.isArray(fieldKey) ? fieldKey : [fieldKey];
-            nameRef.current = [...mergedName.slice(0, -1), ...fieldKeys];
-          }
-          updateItemErrors(nameRef.current.join(NAME_SPLIT), errors, originErrorName);
-        }
-
         const isRequired =
           required !== undefined
             ? required
             : !!(
                 rules &&
                 rules.some(rule => {
-                  if (rule && typeof rule === 'object' && rule.required) {
+                  if (rule && typeof rule === 'object' && rule.required && !rule.warningOnly) {
                     return true;
                   }
                   if (typeof rule === 'function') {
                     const ruleEntity = rule(context);
-                    return ruleEntity && ruleEntity.required;
+                    return ruleEntity && ruleEntity.required && !ruleEntity.warningOnly;
                   }
                   return false;
                 })
@@ -377,10 +377,7 @@ function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElemen
           });
 
           childNode = (
-            <MemoInput
+            <MemoInput value={mergedControl[props.valuePropName || 'value']} update={children}>
-              value={mergedControl[props.valuePropName || 'value']}
-              update={updateRef.current}
-            >
               {cloneElement(children, childProps)}
             </MemoInput>
           );
@@ -395,7 +392,7 @@ function FormItem<Values = any>(props: FormItemProps<Values>): React.ReactElemen
           childNode = children;
         }
 
-        return renderLayout(childNode, fieldId, meta, isRequired);
+        return renderLayout(childNode, fieldId, isRequired);
       }}
     </Field>
   );

components/form/FormItemInput.tsx

@@ -14,9 +14,9 @@ interface FormItemInputMiscProps {
   prefixCls: string;
   children: React.ReactNode;
   errors: React.ReactNode[];
+  warnings: React.ReactNode[];
   hasFeedback?: boolean;
   validateStatus?: ValidateStatus;
-  onDomErrorVisibleChange: (visible: boolean) => void;
   /** @private Internal Usage, do not use in any of your production. */
   _internalItemRender?: {
     mark: string;
@@ -33,9 +33,9 @@ interface FormItemInputMiscProps {
 
 export interface FormItemInputProps {
   wrapperCol?: ColProps;
-  help?: React.ReactNode;
   extra?: React.ReactNode;
   status?: ValidateStatus;
+  help?: React.ReactNode;
 }
 
 const iconMap: { [key: string]: any } = {
@@ -51,13 +51,13 @@ const FormItemInput: React.FC<FormItemInputProps & FormItemInputMiscProps> = pro
     status,
     wrapperCol,
     children,
-    help,
     errors,
-    onDomErrorVisibleChange,
+    warnings,
     hasFeedback,
     _internalItemRender: formItemRender,
     validateStatus,
     extra,
+    help,
   } = props;
   const baseClassName = `${prefixCls}-item`;
 
@@ -67,13 +67,6 @@ const FormItemInput: React.FC<FormItemInputProps & FormItemInputMiscProps> = pro
 
   const className = classNames(`${baseClassName}-control`, mergedWrapperCol.className);
 
-  React.useEffect(
-    () => () => {
-      onDomErrorVisibleChange(false);
-    },
-    [],
-  );
-
   // Should provides additional icon if `hasFeedback`
   const IconNode = validateStatus && iconMap[validateStatus];
   const icon =
@@ -96,7 +89,7 @@ const FormItemInput: React.FC<FormItemInputProps & FormItemInputMiscProps> = pro
   );
   const errorListDom = (
     <FormItemPrefixContext.Provider value={{ prefixCls, status }}>
-      <ErrorList errors={errors} help={help} onDomErrorVisibleChange={onDomErrorVisibleChange} />
+      <ErrorList errors={errors} warnings={warnings} help={help} helpStatus={status} />
     </FormItemPrefixContext.Provider>
   );
 

components/form/FormList.tsx

@@ -25,7 +25,7 @@ export interface FormListProps {
   children: (
     fields: FormListFieldData[],
     operation: FormListOperation,
-    meta: { errors: React.ReactNode[] },
+    meta: { errors: React.ReactNode[]; warnings: React.ReactNode[] },
   ) => React.ReactNode;
 }
 
@@ -48,6 +48,7 @@ const FormList: React.FC<FormListProps> = ({
             operation,
             {
               errors: meta.errors,
+              warnings: meta.warnings,
             },
           )}
         </FormItemPrefixContext.Provider>

components/form/__tests__/__snapshots__/demo.test.js.snap

@@ -306,6 +306,7 @@ exports[`renders ./components/form/demo/advanced-search.md correctly 1`] = `
 
 exports[`renders ./components/form/demo/basic.md correctly 1`] = `
 <form
+  autocomplete="off"
   class="ant-form ant-form-horizontal"
   id="basic"
 >
@@ -1073,9 +1074,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1115,9 +1117,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1188,9 +1191,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1230,9 +1234,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1329,9 +1334,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1384,9 +1390,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1475,9 +1482,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -1526,9 +1534,10 @@ exports[`renders ./components/form/demo/disabled-input-debug.md correctly 1`] =
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Buggy!
@@ -6472,9 +6481,10 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
         </div>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Should be combination of numbers & alphabets
@@ -6597,9 +6607,10 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
         </span>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-validating"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-validating"
           role="alert"
         >
           The information is being validated...
@@ -6774,9 +6785,10 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
         </span>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-error"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-error"
           role="alert"
         >
           Should be combination of numbers & alphabets
@@ -7154,9 +7166,10 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
         </span>
       </div>
       <div
-        class="ant-form-item-explain ant-form-item-explain-validating"
+        class="ant-form-item-explain"
       >
         <div
+          class="ant-form-item-explain-validating"
           role="alert"
         >
           The information is being validated...
@@ -7242,9 +7255,10 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
                 </div>
               </div>
               <div
-                class="ant-form-item-explain ant-form-item-explain-error"
+                class="ant-form-item-explain"
               >
                 <div
+                  class="ant-form-item-explain-error"
                   role="alert"
                 >
                   Please select the correct date
@@ -7720,6 +7734,97 @@ exports[`renders ./components/form/demo/validate-static.md correctly 1`] = `
 </form>
 `;
 
+exports[`renders ./components/form/demo/warning-only.md correctly 1`] = `
+<form
+  autocomplete="off"
+  class="ant-form ant-form-vertical"
+>
+  <div
+    style="overflow:hidden"
+  >
+    <div
+      class="ant-row ant-form-item"
+    >
+      <div
+        class="ant-col ant-form-item-label"
+      >
+        <label
+          class="ant-form-item-required"
+          for="url"
+          title="URL"
+        >
+          URL
+        </label>
+      </div>
+      <div
+        class="ant-col ant-form-item-control"
+      >
+        <div
+          class="ant-form-item-control-input"
+        >
+          <div
+            class="ant-form-item-control-input-content"
+          >
+            <input
+              class="ant-input"
+              id="url"
+              placeholder="input placeholder"
+              type="text"
+              value=""
+            />
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+  <div
+    class="ant-row ant-form-item"
+  >
+    <div
+      class="ant-col ant-form-item-control"
+    >
+      <div
+        class="ant-form-item-control-input"
+      >
+        <div
+          class="ant-form-item-control-input-content"
+        >
+          <div
+            class="ant-space ant-space-horizontal ant-space-align-center"
+          >
+            <div
+              class="ant-space-item"
+              style="margin-right:8px"
+            >
+              <button
+                class="ant-btn ant-btn-primary"
+                type="submit"
+              >
+                <span>
+                  Submit
+                </span>
+              </button>
+            </div>
+            <div
+              class="ant-space-item"
+            >
+              <button
+                class="ant-btn"
+                type="button"
+              >
+                <span>
+                  Fill
+                </span>
+              </button>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</form>
+`;
+
 exports[`renders ./components/form/demo/without-form-create.md correctly 1`] = `
 <form
   class="ant-form ant-form-horizontal"
@@ -7828,6 +7933,7 @@ exports[`renders ./components/form/demo/without-form-create.md correctly 1`] = `
         class="ant-form-item-explain"
       >
         <div
+          class=""
           role="alert"
         >
           A prime is a natural number greater than 1 that has no positive divisors other than 1 and itself.

components/form/__tests__/index.test.js

@@ -1,5 +1,6 @@
 import React, { Component } from 'react';
 import { mount } from 'enzyme';
+import { act } from 'react-dom/test-utils';
 import scrollIntoView from 'scroll-into-view-if-needed';
 import Form from '..';
 import Input from '../../input';
@@ -20,10 +21,17 @@ describe('Form', () => {
   scrollIntoView.mockImplementation(() => {});
   const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {});
 
-  async function change(wrapper, index, value) {
+  async function change(wrapper, index, value, executeMockTimer) {
     wrapper.find(Input).at(index).simulate('change', { target: { value } });
     await sleep(200);
+
+    if (executeMockTimer) {
+      act(() => {
+        jest.runAllTimers();
         wrapper.update();
+      });
+      await sleep(1);
+    }
   }
 
   beforeEach(() => {
@@ -42,6 +50,8 @@ describe('Form', () => {
 
   describe('noStyle Form.Item', () => {
     it('work', async () => {
+      jest.useFakeTimers();
+
       const onChange = jest.fn();
 
       const wrapper = mount(
@@ -54,14 +64,18 @@ describe('Form', () => {
         </Form>,
       );
 
-      await change(wrapper, 0, '');
+      await change(wrapper, 0, '', true);
       expect(wrapper.find('.ant-form-item-with-help').length).toBeTruthy();
       expect(wrapper.find('.ant-form-item-has-error').length).toBeTruthy();
 
       expect(onChange).toHaveBeenCalled();
+
+      jest.useRealTimers();
     });
 
     it('should clean up', async () => {
+      jest.useFakeTimers();
+
       const Demo = () => {
         const [form] = Form.useForm();
 
@@ -105,12 +119,14 @@ describe('Form', () => {
       };
 
       const wrapper = mount(<Demo />);
-      await change(wrapper, 0, '1');
+      await change(wrapper, 0, '1', true);
       expect(wrapper.find('.ant-form-item-explain').text()).toEqual('aaa');
-      await change(wrapper, 0, '2');
+      await change(wrapper, 0, '2', true);
       expect(wrapper.find('.ant-form-item-explain').text()).toEqual('ccc');
-      await change(wrapper, 0, '1');
+      await change(wrapper, 0, '1', true);
       expect(wrapper.find('.ant-form-item-explain').text()).toEqual('aaa');
+
+      jest.useRealTimers();
     });
   });
 
@@ -315,6 +331,8 @@ describe('Form', () => {
 
   // https://github.com/ant-design/ant-design/issues/20706
   it('Error change should work', async () => {
+    jest.useFakeTimers();
+
     const wrapper = mount(
       <Form>
         <Form.Item
@@ -338,15 +356,17 @@ describe('Form', () => {
 
     /* eslint-disable no-await-in-loop */
     for (let i = 0; i < 3; i += 1) {
-      await change(wrapper, 0, '');
+      await change(wrapper, 0, '', true);
       expect(wrapper.find('.ant-form-item-explain').first().text()).toEqual("'name' is required");
 
-      await change(wrapper, 0, 'p');
+      await change(wrapper, 0, 'p', true);
       await sleep(100);
       wrapper.update();
       expect(wrapper.find('.ant-form-item-explain').first().text()).toEqual('not a p');
     }
     /* eslint-enable */
+
+    jest.useRealTimers();
   });
 
   // https://github.com/ant-design/ant-design/issues/20813
@@ -428,6 +448,8 @@ describe('Form', () => {
   });
 
   it('Form.Item with `help` should display error style when validate failed', async () => {
+    jest.useFakeTimers();
+
     const wrapper = mount(
       <Form>
         <Form.Item name="test" help="help" rules={[{ required: true, message: 'message' }]}>
@@ -436,12 +458,16 @@ describe('Form', () => {
       </Form>,
     );
 
-    await change(wrapper, 0, '');
+    await change(wrapper, 0, '', true);
     expect(wrapper.find('.ant-form-item').first().hasClass('ant-form-item-has-error')).toBeTruthy();
     expect(wrapper.find('.ant-form-item-explain').text()).toEqual('help');
+
+    jest.useRealTimers();
   });
 
   it('clear validation message when ', async () => {
+    jest.useFakeTimers();
+
     const wrapper = mount(
       <Form>
         <Form.Item name="username" rules={[{ required: true, message: 'message' }]}>
@@ -449,14 +475,18 @@ describe('Form', () => {
         </Form.Item>
       </Form>,
     );
-    await change(wrapper, 0, '1');
+    await change(wrapper, 0, '1', true);
     expect(wrapper.find('.ant-form-item-explain').length).toBeFalsy();
-    await change(wrapper, 0, '');
+
+    await change(wrapper, 0, '', true);
     expect(wrapper.find('.ant-form-item-explain').length).toBeTruthy();
-    await change(wrapper, 0, '123');
+
+    await change(wrapper, 0, '123', true);
     await sleep(800);
     wrapper.update();
     expect(wrapper.find('.ant-form-item-explain').length).toBeFalsy();
+
+    jest.useRealTimers();
   });
 
   // https://github.com/ant-design/ant-design/issues/21167

components/form/__tests__/list.test.js

@@ -200,34 +200,6 @@ describe('Form.List', () => {
     jest.useRealTimers();
   });
 
-  describe('ErrorList component', () => {
-    it('should trigger onDomErrorVisibleChange by motion end', async () => {
-      jest.useFakeTimers();
-
-      const onDomErrorVisibleChange = jest.fn();
-      const wrapper = mount(
-        <Form.ErrorList
-          errors={['bamboo is light']}
-          onDomErrorVisibleChange={onDomErrorVisibleChange}
-        />,
-      );
-
-      await act(async () => {
-        await sleep();
-        jest.runAllTimers();
-        wrapper.update();
-      });
-
-      act(() => {
-        wrapper.find('CSSMotion').props().onLeaveEnd();
-      });
-
-      expect(onDomErrorVisibleChange).toHaveBeenCalledWith(false);
-
-      jest.useRealTimers();
-    });
-  });
-
   it('should render empty without errors', () => {
     const wrapper = mount(<Form.ErrorList />);
     expect(wrapper.render()).toMatchSnapshot();

components/form/context.tsx

@@ -1,5 +1,6 @@
 import * as React from 'react';
 import omit from 'rc-util/lib/omit';
+import { Meta } from 'rc-field-form/lib/interface';
 import { FormProvider as RcFormProvider } from 'rc-field-form';
 import { FormProviderProps as RcFormProviderProps } from 'rc-field-form/lib/FormContext';
 import { ColProps } from '../grid/col';
@@ -25,14 +26,9 @@ export const FormContext = React.createContext<FormContextProps>({
   itemRef: (() => {}) as any,
 });
 
-/** Form Item Context. Used for Form noStyle Item error collection */
+/** `noStyle` Form Item Context. Used for error collection */
-export interface FormItemContextProps {
+export type ReportMetaChange = (meta: Meta, uniqueKeys: React.Key[]) => void;
-  updateItemErrors: (name: string, errors: string[], originName?: string) => void;
+export const NoStyleItemContext = React.createContext<ReportMetaChange | null>(null);
-}
-
-export const FormItemContext = React.createContext<FormItemContextProps>({
-  updateItemErrors: () => {},
-});
 
 /** Form Provider */
 export interface FormProviderProps extends Omit<RcFormProviderProps, 'validateMessages'> {

components/form/demo/basic.md

@@ -40,6 +40,7 @@ const Demo = () => {
       initialValues={{ remember: true }}
       onFinish={onFinish}
       onFinishFailed={onFinishFailed}
+      autoComplete="off"
     >
       <Form.Item
         label="Username"

components/form/demo/warning-only.md

@@ -0,0 +1,73 @@
+---
+order: 3.2
+title:
+  zh-CN: 非阻塞校验
+  en-US: No block rule
+---
+
+## zh-CN
+
+`rule` 添加 `warningOnly` 后校验不再阻塞表单提交。
+
+## en-US
+
+`rule` with `warningOnly` will not block form submit.
+
+```tsx
+import React from 'react';
+import { Form, Input, message, Button, Space } from 'antd';
+
+const Demo = () => {
+  const [form] = Form.useForm();
+
+  const onFinish = () => {
+    message.success('Submit success!');
+  };
+
+  const onFinishFailed = () => {
+    message.error('Submit failed!');
+  };
+
+  const onFill = () => {
+    form.setFieldsValue({
+      url: 'https://taobao.com/',
+    });
+  };
+
+  return (
+    <Form
+      form={form}
+      layout="vertical"
+      onFinish={onFinish}
+      onFinishFailed={onFinishFailed}
+      autoComplete="off"
+    >
+      <div style={{ overflow: 'hidden' }}>
+        <Form.Item
+          name="url"
+          label="URL"
+          rules={[
+            { required: true },
+            { type: 'url', warningOnly: true },
+            { type: 'string', min: 6 },
+          ]}
+        >
+          <Input placeholder="input placeholder" />
+        </Form.Item>
+      </div>
+      <Form.Item>
+        <Space>
+          <Button type="primary" htmlType="submit">
+            Submit
+          </Button>
+          <Button htmlType="button" onClick={onFill}>
+            Fill
+          </Button>
+        </Space>
+      </Form.Item>
+    </Form>
+  );
+};
+
+ReactDOM.render(<Demo />, mountNode);
+```

components/form/hooks/useCacheErrors.ts

@@ -1,47 +0,0 @@
-import * as React from 'react';
-import useForceUpdate from '../../_util/hooks/useForceUpdate';
-
-/** Always debounce error to avoid [error -> null -> error] blink */
-export default function useCacheErrors(
-  errors: React.ReactNode[],
-  changeTrigger: (visible: boolean) => void,
-  directly: boolean,
-): [boolean, React.ReactNode[]] {
-  const cacheRef = React.useRef({
-    errors,
-    visible: !!errors.length,
-  });
-
-  const forceUpdate = useForceUpdate();
-
-  const update = () => {
-    const prevVisible = cacheRef.current.visible;
-    const newVisible = !!errors.length;
-
-    const prevErrors = cacheRef.current.errors;
-    cacheRef.current.errors = errors;
-    cacheRef.current.visible = newVisible;
-
-    if (prevVisible !== newVisible) {
-      changeTrigger(newVisible);
-    } else if (
-      prevErrors.length !== errors.length ||
-      prevErrors.some((prevErr, index) => prevErr !== errors[index])
-    ) {
-      forceUpdate();
-    }
-  };
-
-  React.useEffect(() => {
-    if (!directly) {
-      const timeout = setTimeout(update, 10);
-      return () => clearTimeout(timeout);
-    }
-  }, [errors]);
-
-  if (directly) {
-    update();
-  }
-
-  return [cacheRef.current.visible, cacheRef.current.errors];
-}

components/form/hooks/useDebounce.ts

@@ -0,0 +1,19 @@
+import * as React from 'react';
+
+export default function useDebounce<T>(value: T[]): T[] {
+  const [cacheValue, setCacheValue] = React.useState(value);
+  React.useEffect(() => {
+    const timeout = setTimeout(
+      () => {
+        setCacheValue(value);
+      },
+      value.length ? 0 : 10,
+    );
+
+    return () => {
+      clearTimeout(timeout);
+    };
+  }, [value]);
+
+  return cacheValue;
+}

components/form/index.en-US.md

@@ -302,22 +302,23 @@ Rule supports a config object, or a function returning config object:
 type Rule = RuleConfig | ((form: FormInstance) => RuleConfig);
 ```
 
-| Name | Description | Type |
+| Name | Description | Type | Version |
-| --- | --- | --- |
+| --- | --- | --- | --- |
-| defaultField | Validate rule for all array elements, valid when `type` is `array` | [rule](#Rule) |
+| defaultField | Validate rule for all array elements, valid when `type` is `array` | [rule](#Rule) |  |
-| enum | Match enum value. You need to set `type` to `enum` to enable this | any\[] |
+| enum | Match enum value. You need to set `type` to `enum` to enable this | any\[] |  |
-| fields | Validate rule for child elements, valid when `type` is `array` or `object` | Record<string, [rule](#Rule)> |
+| fields | Validate rule for child elements, valid when `type` is `array` or `object` | Record<string, [rule](#Rule)> |  |
-| len | Length of string, number, array | number |
+| len | Length of string, number, array | number |  |
-| max | `type` required: max length of `string`, `number`, `array` | number |
+| max | `type` required: max length of `string`, `number`, `array` | number |  |
-| message | Error message. Will auto generate by [template](#validateMessages) if not provided | string |
+| message | Error message. Will auto generate by [template](#validateMessages) if not provided | string |  |
-| min | `type` required: min length of `string`, `number`, `array` | number |
+| min | `type` required: min length of `string`, `number`, `array` | number |  |
-| pattern | Regex pattern | RegExp |
+| pattern | Regex pattern | RegExp |  |
-| required | Required field | boolean |
+| required | Required field | boolean |  |
-| transform | Transform value to the rule before validation | (value) => any |
+| transform | Transform value to the rule before validation | (value) => any |  |
-| type | Normally `string` \|`number` \|`boolean` \|`url` \| `email`. More type to ref [here](https://github.com/yiminghe/async-validator#type) | string |
+| type | Normally `string` \|`number` \|`boolean` \|`url` \| `email`. More type to ref [here](https://github.com/yiminghe/async-validator#type) | string |  |
-| validateTrigger | Set validate trigger event. Must be the sub set of `validateTrigger` in Form.Item | string \| string\[] |
+| validateTrigger | Set validate trigger event. Must be the sub set of `validateTrigger` in Form.Item | string \| string\[] |  |
-| validator | Customize validation rule. Accept Promise as return. See [example](#components-form-demo-register) | ([rule](#Rule), value) => Promise |
+| validator | Customize validation rule. Accept Promise as return. See [example](#components-form-demo-register) | ([rule](#Rule), value) => Promise |  |
-| whitespace | Failed if only has whitespace | boolean |
+| warningOnly | Warning only. Not block form submit | boolean | 4.17.0 |
+| whitespace | Failed if only has whitespace | boolean |  |
 
 ## Migrate to v4
 

components/form/index.zh-CN.md

@@ -301,22 +301,23 @@ Rule 支持接收 object 进行配置，也支持 function 来动态获取 form
 type Rule = RuleConfig | ((form: FormInstance) => RuleConfig);
 ```
 
-| 名称 | 说明 | 类型 |
+| 名称 | 说明 | 类型 | 版本 |
-| --- | --- | --- |
+| --- | --- | --- | --- |
-| defaultField | 仅在 `type` 为 `array` 类型时有效，用于指定数组元素的校验规则 | [rule](#Rule) |
+| defaultField | 仅在 `type` 为 `array` 类型时有效，用于指定数组元素的校验规则 | [rule](#Rule) |  |
-| enum | 是否匹配枚举中的值（需要将 `type` 设置为 `enum`） | any\[] |
+| enum | 是否匹配枚举中的值（需要将 `type` 设置为 `enum`） | any\[] |  |
-| fields | 仅在 `type` 为 `array` 或 `object` 类型时有效，用于指定子元素的校验规则 | Record<string, [rule](#Rule)> |
+| fields | 仅在 `type` 为 `array` 或 `object` 类型时有效，用于指定子元素的校验规则 | Record<string, [rule](#Rule)> |  |
-| len | string 类型时为字符串长度；number 类型时为确定数字； array 类型时为数组长度 | number |
+| len | string 类型时为字符串长度；number 类型时为确定数字； array 类型时为数组长度 | number |  |
-| max | 必须设置 `type`：string 类型为字符串最大长度；number 类型时为最大值；array 类型时为数组最大长度 | number |
+| max | 必须设置 `type`：string 类型为字符串最大长度；number 类型时为最大值；array 类型时为数组最大长度 | number |  |
-| message | 错误信息，不设置时会通过[模板](#validateMessages)自动生成 | string |
+| message | 错误信息，不设置时会通过[模板](#validateMessages)自动生成 | string |  |
-| min | 必须设置 `type`：string 类型为字符串最小长度；number 类型时为最小值；array 类型时为数组最小长度 | number |
+| min | 必须设置 `type`：string 类型为字符串最小长度；number 类型时为最小值；array 类型时为数组最小长度 | number |  |
-| pattern | 正则表达式匹配 | RegExp |
+| pattern | 正则表达式匹配 | RegExp |  |
-| required | 是否为必选字段 | boolean |
+| required | 是否为必选字段 | boolean |  |
-| transform | 将字段值转换成目标值后进行校验 | (value) => any |
+| transform | 将字段值转换成目标值后进行校验 | (value) => any |  |
-| type | 类型，常见有 `string` \|`number` \|`boolean` \|`url` \| `email`。更多请参考[此处](https://github.com/yiminghe/async-validator#type) | string |
+| type | 类型，常见有 `string` \|`number` \|`boolean` \|`url` \| `email`。更多请参考[此处](https://github.com/yiminghe/async-validator#type) | string |  |
-| validateTrigger | 设置触发验证时机，必须是 Form.Item 的 `validateTrigger` 的子集 | string \| string\[] |
+| validateTrigger | 设置触发验证时机，必须是 Form.Item 的 `validateTrigger` 的子集 | string \| string\[] |  |
-| validator | 自定义校验，接收 Promise 作为返回值。[示例](#components-form-demo-register)参考 | ([rule](#Rule), value) => Promise |
+| validator | 自定义校验，接收 Promise 作为返回值。[示例](#components-form-demo-register)参考 | ([rule](#Rule), value) => Promise |  |
-| whitespace | 如果字段仅包含空格则校验不通过 | boolean |
+| warningOnly | 仅警告，不阻塞表单提交 | boolean | 4.17.0 |
+| whitespace | 如果字段仅包含空格则校验不通过 | boolean |  |
 
 ## 从 v3 升级到 v4
 

components/form/style/index.less

@@ -61,9 +61,12 @@
 
   margin-bottom: @form-item-margin-bottom;
   vertical-align: top;
+  // We delay one frame (0.017s) here to let CSSMotion goes
+  transition: margin-bottom @animation-duration-slow 0.017s linear;
 
   &-with-help {
     margin-bottom: 0;
+    transition: none;
   }
 
   &-hidden,
@@ -89,7 +92,6 @@
 
     > label {
       position: relative;
-      // display: inline;
       display: inline-flex;
       align-items: center;
       height: @form-item-label-height;
@@ -179,10 +181,12 @@
     }
   }
 
+  // ==============================================================
+  // =                           Explain                          =
+  // ==============================================================
   &-explain,
   &-extra {
     clear: both;
-    min-height: @form-item-margin-bottom;
     color: @text-color-secondary;
     font-size: @font-size-base;
     line-height: @line-height-base;
@@ -190,43 +194,64 @@
     .explainAndExtraDistance((@form-item-margin-bottom - @form-font-height) / 2);
   }
 
+  &-explain {
+    height: 0;
+    min-height: 0;
+    opacity: 0;
+  }
+
+  &-extra {
+    min-height: @form-item-margin-bottom;
+  }
+
   .@{ant-prefix}-input-textarea-show-count {
     &::after {
       margin-bottom: -22px;
     }
   }
-}
 
-.show-help-motion(@className, @keyframeName, @duration: @animation-duration-slow) {
+  &-with-help &-explain {
-  @name: ~'@{ant-prefix}-@{className}';
+    height: auto;
-  .make-motion(@name, @keyframeName, @duration);
+    min-height: @form-item-margin-bottom;
-  .@{name}-enter,
-  .@{name}-appear {
-    opacity: 0;
-    animation-timing-function: @ease-in-out;
-  }
-  .@{name}-leave {
-    animation-timing-function: @ease-in-out;
-  }
-}
-
-.show-help-motion(show-help, antShowHelp, 0.3s);
-
-@keyframes antShowHelpIn {
-  0% {
-    transform: translateY(-5px);
-    opacity: 0;
-  }
-  100% {
-    transform: translateY(0);
     opacity: 1;
   }
 }
 
-@keyframes antShowHelpOut {
+// >>>>>>>>>> Motion <<<<<<<<<<
-  to {
+// Explain holder
+.@{ant-prefix}-show-help {
+  transition: height @animation-duration-slow linear, min-height @animation-duration-slow linear,
+    margin-bottom @animation-duration-slow @ease-in-out,
+    opacity @animation-duration-slow @ease-in-out;
+
+  &-leave {
+    min-height: @form-item-margin-bottom;
+
+    &-active {
+      min-height: 0;
+    }
+  }
+}
+
+// Explain
+.@{ant-prefix}-show-help-item {
+  overflow: hidden;
+  transition: height @animation-duration-slow @ease-in-out,
+    opacity @animation-duration-slow @ease-in-out, transform @animation-duration-slow @ease-in-out !important;
+
+  &-appear,
+  &-enter {
     transform: translateY(-5px);
     opacity: 0;
+
+    &-active {
+      transform: translateY(0);
+      opacity: 1;
+    }
+  }
+
+  &-leave-active {
+    transform: translateY(-5px);
   }
 }
 

components/form/style/status.less

@@ -9,11 +9,11 @@
   // ========================= Explain =========================
   /* To support leave along ErrorList. We add additional className to handle explain style */
   &-explain {
-    &&-error {
+    &-error {
       color: @error-color;
     }
 
-    &&-warning {
+    &-warning {
       color: @warning-color;
     }
   }

components/table/__tests__/__snapshots__/demo.test.js.snap

@@ -16705,7 +16705,21 @@ exports[`renders ./components/table/demo/sticky.md correctly 1`] = `
                     colspan="2"
                     style="position:sticky;left:0"
                   >
-                    Fix Left
+                    <button
+                      aria-checked="false"
+                      class="ant-switch"
+                      role="switch"
+                      type="button"
+                    >
+                      <div
+                        class="ant-switch-handle"
+                      />
+                      <span
+                        class="ant-switch-inner"
+                      >
+                        Fixed Top
+                      </span>
+                    </button>
                   </td>
                   <td
                     class="ant-table-cell"

components/table/demo/sticky.md

@@ -14,7 +14,7 @@ title:
 For long table，need to scroll to view the header and scroll bar，then you can now set the fixed header and scroll bar to follow the page.
 
 ```jsx
-import { Table } from 'antd';
+import { Table, Switch } from 'antd';
 
 const columns = [
   {
@@ -93,16 +93,26 @@ for (let i = 0; i < 100; i++) {
   });
 }
 
-ReactDOM.render(
+const Demo = () => {
+  const [fixedTop, setFixedTop] = React.useState(false);
+
+  return (
     <Table
       columns={columns}
       dataSource={data}
       scroll={{ x: 1500 }}
       summary={pageData => (
-      <Table.Summary fixed>
+        <Table.Summary fixed={fixedTop ? 'top' : 'bottom'}>
           <Table.Summary.Row>
             <Table.Summary.Cell index={0} colSpan={2}>
-            Fix Left
+              <Switch
+                checkedChildren="Fixed Top"
+                unCheckedChildren="Fixed Top"
+                checked={fixedTop}
+                onChange={() => {
+                  setFixedTop(!fixedTop);
+                }}
+              />
             </Table.Summary.Cell>
             <Table.Summary.Cell index={2} colSpan={8}>
               Scroll Context
@@ -112,7 +122,9 @@ ReactDOM.render(
         </Table.Summary>
       )}
       sticky
-  />,
+    />
-  mountNode,
+  );
-);
+};
+
+ReactDOM.render(<Demo />, mountNode);
 ```

components/tree-select/__tests__/__snapshots__/demo.test.js.snap

@@ -381,3 +381,111 @@ exports[`renders ./components/tree-select/demo/treeData.md correctly 1`] = `
   </span>
 </div>
 `;
+
+exports[`renders ./components/tree-select/demo/treeLine.md correctly 1`] = `
+<div
+  class="ant-space ant-space-vertical"
+>
+  <div
+    class="ant-space-item"
+    style="margin-bottom:8px"
+  >
+    <button
+      aria-checked="true"
+      class="ant-switch ant-switch-checked"
+      role="switch"
+      type="button"
+    >
+      <div
+        class="ant-switch-handle"
+      />
+      <span
+        class="ant-switch-inner"
+      >
+        treeLine
+      </span>
+    </button>
+  </div>
+  <div
+    class="ant-space-item"
+    style="margin-bottom:8px"
+  >
+    <button
+      aria-checked="false"
+      class="ant-switch"
+      role="switch"
+      type="button"
+    >
+      <div
+        class="ant-switch-handle"
+      />
+      <span
+        class="ant-switch-inner"
+      >
+        showLeafIcon
+      </span>
+    </button>
+  </div>
+  <div
+    class="ant-space-item"
+  >
+    <div
+      class="ant-select ant-tree-select ant-select-single ant-select-show-arrow"
+      style="width:300px"
+    >
+      <div
+        class="ant-select-selector"
+      >
+        <span
+          class="ant-select-selection-search"
+        >
+          <input
+            aria-activedescendant="undefined_list_0"
+            aria-autocomplete="list"
+            aria-controls="undefined_list"
+            aria-haspopup="listbox"
+            aria-owns="undefined_list"
+            autocomplete="off"
+            class="ant-select-selection-search-input"
+            readonly=""
+            role="combobox"
+            style="opacity:0"
+            type="search"
+            unselectable="on"
+            value=""
+          />
+        </span>
+        <span
+          class="ant-select-selection-placeholder"
+        />
+      </div>
+      <span
+        aria-hidden="true"
+        class="ant-select-arrow"
+        style="user-select:none;-webkit-user-select:none"
+        unselectable="on"
+      >
+        <span
+          aria-label="down"
+          class="anticon anticon-down ant-select-suffix"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            data-icon="down"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M884 256h-75c-5.1 0-9.9 2.5-12.9 6.6L512 654.2 227.9 262.6c-3-4.1-7.8-6.6-12.9-6.6h-75c-6.5 0-10.3 7.4-6.5 12.7l352.6 486.1c12.8 17.6 39 17.6 51.7 0l352.6-486.1c3.9-5.3.1-12.7-6.4-12.7z"
+            />
+          </svg>
+        </span>
+      </span>
+    </div>
+  </div>
+</div>
+`;

components/tree-select/demo/async.md

@@ -45,6 +45,7 @@ class Demo extends React.Component {
           treeData: this.state.treeData.concat([
             this.genTreeNode(id, false),
             this.genTreeNode(id, true),
+            this.genTreeNode(id, true),
           ]),
         });
         resolve();

components/tree-select/demo/treeLine.md

@@ -0,0 +1,56 @@
+---
+order: 6
+title:
+  zh-CN: 线性样式
+  en-US: Show Tree Line
+---
+
+## zh-CN
+
+通过 `treeLine` 配置线性样式。
+
+## en-US
+
+Use `treeLine` to show the line style.
+
+```tsx
+import { TreeSelect, Switch, Space } from 'antd';
+
+const { TreeNode } = TreeSelect;
+
+const Demo = () => {
+  const [treeLine, setTreeLine] = React.useState(true);
+  const [showLeafIcon, setShowLeafIcon] = React.useState(false);
+
+  return (
+    <Space direction="vertical">
+      <Switch
+        checkedChildren="treeLine"
+        unCheckedChildren="treeLine"
+        checked={treeLine}
+        onChange={() => setTreeLine(!treeLine)}
+      />
+      <Switch
+        disabled={!treeLine}
+        checkedChildren="showLeafIcon"
+        unCheckedChildren="showLeafIcon"
+        checked={showLeafIcon}
+        onChange={() => setShowLeafIcon(!showLeafIcon)}
+      />
+      <TreeSelect treeLine={treeLine && { showLeafIcon }} style={{ width: 300 }}>
+        <TreeNode value="parent 1" title="parent 1">
+          <TreeNode value="parent 1-0" title="parent 1-0">
+            <TreeNode value="leaf1" title="my leaf" />
+            <TreeNode value="leaf2" title="your leaf" />
+          </TreeNode>
+          <TreeNode value="parent 1-1" title="parent 1-1">
+            <TreeNode value="sss" title="sss" />
+          </TreeNode>
+        </TreeNode>
+      </TreeSelect>
+    </Space>
+  );
+};
+
+ReactDOM.render(<Demo />, mountNode);
+```

components/tree-select/index.en-US.md

@@ -50,6 +50,7 @@ Tree selection control.
 | treeDefaultExpandedKeys | Default expanded treeNodes | string\[] | - |  |
 | treeExpandedKeys | Set expanded keys | string\[] | - |  |
 | treeIcon | Shows the icon before a TreeNode's title. There is no default style; you must set a custom style for it if set to `true` | boolean | false |  |
+| treeLine | Show the line. Ref [Tree - showLine](/components/tree/#components-tree-demo-line) | boolean \| object | false | 4.17.0 |
 | treeNodeFilterProp | Will be used for filtering if `filterTreeNode` returns true | string | `value` |  |
 | treeNodeLabelProp | Will render as content of select | string | `title` |  |
 | value | To set the current selected treeNode(s) | string \| string\[] | - |  |
@@ -63,7 +64,7 @@ Tree selection control.
 ### Tree Methods
 
 | Name    | Description  | Version |
-| --- | --- | --- |
+| ------- | ------------ | ------- |
 | blur()  | Remove focus |         |
 | focus() | Get focus    |         |
 

components/tree-select/index.tsx

@@ -11,7 +11,7 @@ import omit from 'rc-util/lib/omit';
 import { DefaultValueType } from 'rc-tree-select/lib/interface';
 import { ConfigContext } from '../config-provider';
 import devWarning from '../_util/devWarning';
-import { AntTreeNodeProps } from '../tree';
+import { AntTreeNodeProps, TreeProps } from '../tree';
 import getIcons from '../select/utils/iconUtil';
 import renderSwitcherIcon from '../tree/utils/iconUtil';
 import SizeContext, { SizeType } from '../config-provider/SizeContext';
@@ -30,11 +30,18 @@ export type SelectValue = RawValue | RawValue[] | LabeledValue | LabeledValue[];
 export interface TreeSelectProps<T>
   extends Omit<
     RcTreeSelectProps<T>,
-    'showTreeIcon' | 'treeMotion' | 'inputIcon' | 'mode' | 'getInputElement' | 'backfill'
+    | 'showTreeIcon'
+    | 'treeMotion'
+    | 'inputIcon'
+    | 'mode'
+    | 'getInputElement'
+    | 'backfill'
+    | 'treeLine'
   > {
   suffixIcon?: React.ReactNode;
   size?: SizeType;
   bordered?: boolean;
+  treeLine?: TreeProps['showLine'];
 }
 
 export interface RefTreeSelectProps {
@@ -140,6 +147,7 @@ const InternalTreeSelect = <T extends DefaultValueType>(
       treeCheckable={
         treeCheckable ? <span className={`${prefixCls}-tree-checkbox-inner`} /> : treeCheckable
       }
+      treeLine={!!treeLine}
       inputIcon={suffixIcon}
       multiple={multiple}
       removeIcon={removeIcon}

components/tree-select/index.zh-CN.md

@@ -51,6 +51,7 @@ cover: https://gw.alipayobjects.com/zos/alicdn/Ax4DA0njr/TreeSelect.svg
 | treeDefaultExpandedKeys | 默认展开的树节点 | string\[] | - |  |
 | treeExpandedKeys | 设置展开的树节点 | string\[] | - |  |
 | treeIcon | 是否展示 TreeNode title 前的图标，没有默认样式，如设置为 true，需要自行定义图标相关样式 | boolean | false |  |
+| treeLine | 是否展示线条样式，请参考 [Tree - showLine](/components/tree/#components-tree-demo-line) | boolean \| object | false | 4.17.0 |
 | treeNodeFilterProp | 输入项过滤对应的 treeNode 属性 | string | `value` |  |
 | treeNodeLabelProp | 作为显示的 prop 设置 | string | `title` |  |
 | value | 指定当前选中的条目 | string \| string\[] | - |  |
@@ -64,7 +65,7 @@ cover: https://gw.alipayobjects.com/zos/alicdn/Ax4DA0njr/TreeSelect.svg
 ### Tree 方法
 
 | 名称    | 描述     | 版本 |
-| --- | --- | --- |
+| ------- | -------- | ---- |
 | blur()  | 移除焦点 |      |
 | focus() | 获取焦点 |      |
 
@@ -73,7 +74,7 @@ cover: https://gw.alipayobjects.com/zos/alicdn/Ax4DA0njr/TreeSelect.svg
 > 建议使用 treeData 来代替 TreeNode，免去手工构造麻烦
 
 | 参数            | 说明                                               | 类型      | 默认值 | 版本 |
-| --- | --- | --- | --- | --- |
+| --------------- | -------------------------------------------------- | --------- | ------ | ---- |
 | checkable       | 当树为 Checkbox 时，设置独立节点是否展示 Checkbox  | boolean   | -      |      |
 | disableCheckbox | 禁掉 Checkbox                                      | boolean   | false  |      |
 | disabled        | 是否禁用                                           | boolean   | false  |      |

components/tree-select/style/index.less

@@ -11,7 +11,7 @@
 .@{tree-select-prefix-cls} {
   // ======================= Dropdown =======================
   &-dropdown {
-    padding: @padding-xs (@padding-xs / 2) 0;
+    padding: @padding-xs (@padding-xs / 2);
 
     &-rtl {
       direction: rtl;
@@ -24,8 +24,6 @@
         align-items: stretch;
 
         .@{select-tree-prefix-cls}-treenode {
-          padding-bottom: @padding-xs;
-
           .@{select-tree-prefix-cls}-node-content-wrapper {
             flex: auto;
           }

components/tree/style/mixin.less

@@ -1,7 +1,6 @@
 @import '../../style/mixins/index';
 
 @tree-prefix-cls: ~'@{ant-prefix}-tree';
-@tree-node-prefix-cls: ~'@{tree-prefix-cls}-treenode';
 @select-tree-prefix-cls: ~'@{ant-prefix}-select-tree';
 @tree-motion: ~'@{ant-prefix}-motion-collapse';
 @tree-node-padding: (@padding-xs / 2);
@@ -259,10 +258,9 @@
       }
     }
   }
-}
 
-.@{tree-node-prefix-cls}-leaf-last {
+  .@{custom-tree-node-prefix-cls}-leaf-last {
-  .@{tree-prefix-cls}-switcher {
+    .@{custom-tree-prefix-cls}-switcher {
       &-leaf-line {
         &::before {
           top: auto !important;
@@ -271,4 +269,5 @@
         }
       }
     }
+  }
 }

package.json

@@ -122,12 +122,12 @@
     "rc-dialog": "~8.5.1",
     "rc-drawer": "~4.3.0",
     "rc-dropdown": "~3.2.0",
-    "rc-field-form": "~1.20.0",
+    "rc-field-form": "~1.21.0-2",
     "rc-image": "~5.2.4",
     "rc-input-number": "~7.1.0",
     "rc-mentions": "~1.6.1",
     "rc-menu": "~9.0.9",
-    "rc-motion": "^2.4.0",
+    "rc-motion": "^2.4.4",
     "rc-notification": "~4.5.7",
     "rc-pagination": "~3.1.6",
     "rc-picker": "~2.5.10",
@@ -138,7 +138,7 @@
     "rc-slider": "~9.7.1",
     "rc-steps": "~4.1.0",
     "rc-switch": "~3.2.0",
-    "rc-table": "~7.15.1",
+    "rc-table": "~7.16.0",
     "rc-tabs": "~11.9.1",
     "rc-textarea": "~0.3.0",
     "rc-tooltip": "~5.1.1",