Fix/gap fixed columns shadow

assets/index.less

@@ -56,12 +56,6 @@
   }
 
   // ================== Cell ==================
-  &-fixed-column-gapped {
-    .@{tablePrefixCls}-cell-fix-left-last::after,
-    .@{tablePrefixCls}-cell-fix-right-first::after {
-      display: none !important;
-    }
-  }
 
   &-cell {
     background: #f4f4f4;

src/Body/BodyRow.tsx

@@ -167,6 +167,7 @@ function BodyRow<RecordType extends { children?: readonly RecordType[] }>(
             key={key}
             record={record}
             index={index}
+            colIndex={colIndex}
             renderIndex={renderIndex}
             dataIndex={dataIndex}
             render={render}

src/Cell/index.tsx

@@ -22,6 +22,8 @@ export interface CellProps<RecordType extends DefaultRecordType> {
   record?: RecordType;
   /** `column` index is the real show rowIndex */
   index?: number;
+  /** the column index which cell in */
+  colIndex?: number;
   /** the index of the record. For the render(value, record, renderIndex) */
   renderIndex?: number;
   dataIndex?: DataIndex<RecordType>;
@@ -72,7 +74,10 @@ const getTitleFromCellRenderChildren = ({
   return title;
 };
 
-function Cell<RecordType>(props: CellProps<RecordType>) {
+function Cell<RecordType>(
+  props: CellProps<RecordType>,
+  ref: React.ForwardedRef<HTMLTableCellElement>,
+) {
   if (process.env.NODE_ENV !== 'production') {
     devRenderTimes(props);
   }
@@ -99,6 +104,9 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
     index,
     rowType,
 
+    // Col,
+    colIndex,
+
     // Span
     colSpan,
     rowSpan,
@@ -118,11 +126,14 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
   } = props;
 
   const cellPrefixCls = `${prefixCls}-cell`;
-  const { supportSticky, allColumnsFixedLeft, rowHoverable } = useContext(TableContext, [
-    'supportSticky',
-    'allColumnsFixedLeft',
-    'rowHoverable',
-  ]);
+  const { supportSticky, allColumnsFixedLeft, rowHoverable, bodyScrollLeft, headerCellRefs } =
+    useContext(TableContext, [
+      'supportSticky',
+      'allColumnsFixedLeft',
+      'rowHoverable',
+      'bodyScrollLeft',
+      'headerCellRefs',
+    ]);
 
   // ====================== Value =======================
   const [childNode, legacyCellProps] = useCellRender(
@@ -171,6 +182,16 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
     additionalProps?.onMouseLeave?.(event);
   });
 
+  let mergedLastFixLeft = lastFixLeft;
+  const { current } = headerCellRefs;
+  const dom = current[colIndex];
+  if (lastFixLeft && dom) {
+    const offsetLeft =
+      dom.getBoundingClientRect().x - dom.parentElement.getBoundingClientRect().x || 0;
+
+    // should not be tagged as lastFixLeft if cell is not stickying;
+    mergedLastFixLeft = typeof fixLeft === 'number' && offsetLeft === fixLeft + bodyScrollLeft;
+  }
   // ====================== Render ======================
   if (mergedColSpan === 0 || mergedRowSpan === 0) {
     return null;
@@ -192,8 +213,8 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
     {
       [`${cellPrefixCls}-fix-left`]: isFixLeft && supportSticky,
       [`${cellPrefixCls}-fix-left-first`]: firstFixLeft && supportSticky,
-      [`${cellPrefixCls}-fix-left-last`]: lastFixLeft && supportSticky,
-      [`${cellPrefixCls}-fix-left-all`]: lastFixLeft && allColumnsFixedLeft && supportSticky,
+      [`${cellPrefixCls}-fix-left-last`]: mergedLastFixLeft && supportSticky,
+      [`${cellPrefixCls}-fix-left-all`]: mergedLastFixLeft && allColumnsFixedLeft && supportSticky,
       [`${cellPrefixCls}-fix-right`]: isFixRight && supportSticky,
       [`${cellPrefixCls}-fix-right-first`]: firstFixRight && supportSticky,
       [`${cellPrefixCls}-fix-right-last`]: lastFixRight && supportSticky,
@@ -237,6 +258,7 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
 
   return (
     <Component
+      ref={ref}
       {...legacyCellProps}
       {...additionalProps}
       className={mergedClassName}
@@ -257,4 +279,6 @@ function Cell<RecordType>(props: CellProps<RecordType>) {
   );
 }
 
-export default React.memo(Cell) as typeof Cell;
+export default React.memo(React.forwardRef(Cell)) as <RecordType>(
+  props: CellProps<RecordType> & { ref?: React.ForwardedRef<HTMLTableCellElement> },
+) => React.JSX.Element;

src/Header/HeaderRow.tsx

@@ -32,7 +32,11 @@ const HeaderRow = <RecordType extends any>(props: RowProps<RecordType>) => {
     onHeaderRow,
     index,
   } = props;
-  const { prefixCls, direction } = useContext(TableContext, ['prefixCls', 'direction']);
+  const { prefixCls, direction, headerCellRefs } = useContext(TableContext, [
+    'prefixCls',
+    'direction',
+    'headerCellRefs',
+  ]);
   let rowProps: React.HTMLAttributes<HTMLElement>;
   if (onHeaderRow) {
     rowProps = onHeaderRow(
@@ -62,6 +66,8 @@ const HeaderRow = <RecordType extends any>(props: RowProps<RecordType>) => {
 
         return (
           <Cell
+            colIndex={cellIndex}
+            ref={headerCellRef => (headerCellRefs.current[cellIndex] = headerCellRef)}
             {...cell}
             scope={column.title ? (cell.colSpan > 1 ? 'colgroup' : 'col') : null}
             ellipsis={column.ellipsis}

src/Table.tsx

@@ -435,12 +435,14 @@ function Table<RecordType extends DefaultRecordType>(
       }
     }
   }
+  const [bodyScrollLeft, setBodyScrollLeft] = React.useState<number>(0);
 
   const onInternalScroll = useEvent(
     ({ currentTarget, scrollLeft }: { currentTarget: HTMLElement; scrollLeft?: number }) => {
       const isRTL = direction === 'rtl';
       const mergedScrollLeft =
         typeof scrollLeft === 'number' ? scrollLeft : currentTarget.scrollLeft;
+      setBodyScrollLeft(mergedScrollLeft);
 
       const compareTarget = currentTarget || EMPTY_SCROLL_TARGET;
       if (!getScrollTarget() || getScrollTarget() === compareTarget) {
@@ -796,6 +798,7 @@ function Table<RecordType extends DefaultRecordType>(
 
   const fixedInfoList = useFixedInfo(flattenColumns, stickyOffsets, direction);
 
+  const headerCellRefs = React.useRef<HTMLTableCellElement[]>([]);
   const TableContextValue = React.useMemo(
     () => ({
       // Scroll
@@ -846,6 +849,8 @@ function Table<RecordType extends DefaultRecordType>(
       childrenColumnName: mergedChildrenColumnName,
 
       rowHoverable,
+      bodyScrollLeft,
+      headerCellRefs,
     }),
     [
       // Scroll
@@ -895,6 +900,8 @@ function Table<RecordType extends DefaultRecordType>(
       mergedChildrenColumnName,
 
       rowHoverable,
+      bodyScrollLeft,
+      headerCellRefs,
     ],
   );
 

src/context/TableContext.tsx

@@ -66,8 +66,9 @@ export interface TableContextProps<RecordType = any> {
   expandedKeys: Set<React.Key>;
   getRowKey: GetRowKey<RecordType>;
   childrenColumnName: string;
-
+  headerCellRefs: React.MutableRefObject<HTMLTableCellElement[]>;
   rowHoverable?: boolean;
+  bodyScrollLeft?: number;
 }
 
 const TableContext = createContext<TableContextProps>();

tests/FixedColumn.spec.tsx

@@ -25,6 +25,31 @@ describe('Table.FixedColumn', () => {
       offsetWidth: {
         get: () => 1000,
       },
+      getBoundingClientRect() {
+        if (this.tagName === 'TR') {
+          return {
+            x: 0,
+            y: 0,
+            width: 1000,
+            height: 105,
+          };
+        }
+        if (this.textContent === 'title2') {
+          return {
+            x: 93,
+            y: 0,
+            width: 93,
+            height: 105,
+          };
+        }
+
+        return {
+          x: 0,
+          y: 0,
+          width: 100,
+          height: 100,
+        };
+      },
     });
   });
 
@@ -249,6 +274,20 @@ describe('Table.FixedColumn', () => {
 
   it('when all columns fixed left,cell should has classname rc-table-cell-fix-left-all', async () => {
     const wrapper = mount(<Table columns={columns.slice(0, 2)} data={data} scroll={{ x: 1000 }} />);
+
+    // make `mergedLastFixLeft`'s calculation work.
+    act(() => {
+      wrapper
+        .find(RcResizeObserver.Collection)
+        .first()
+        .props()
+        .onBatchResize([
+          {
+            data: wrapper.find('table ResizeObserver').first().props().data,
+            size: { width: 93, offsetWidth: 93 },
+          } as any,
+        ]);
+    });
     await safeAct(wrapper);
     expect(wrapper.find('.rc-table-cell-fix-left-all')).toHaveLength(10);
   });