TreeList & DataGrid: Add A11y Exception Info (#8244) (#8246)

Author: arman-boyakhchyan

concepts/05 UI Components/DataGrid/05 Accessibility/10 Accessibility Standards Compliance.md

@@ -24,7 +24,12 @@ The DataGrid component meets a variety of <a href="https://www.access-board.gov/
     <tr>
         <td>11.5.2.12 Execution of available actions</td>
         <td>2.1.1 Keyboard (Level A)</td>
-        <td>Keyboard navigation is not supported for ColumnChooser items in 'drag' mode.</td>
+        <td>
+            <ul>
+                <li>ColumnChooser items in 'drag' mode do not support keyboard navigation.</li>
+                <li>Column resizing does not support keyboard actions (when <a href="/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#allowColumnResizing">allowColumnResizing</a> is enabled).</li>
+            </ul>
+        </td>
     </tr>
     <tr>
         <td>-</td>
@@ -45,7 +50,12 @@ The DataGrid component meets a variety of <a href="https://www.access-board.gov/
     <tr>
         <td>-</td>
         <td>2.5.8 Target Size (Minimum) (Level AA 2.2 only)</td>
-        <td>Command buttons and icons.</td>
+        <td>
+            <ul>
+                <li>Command buttons and icons.</li>
+                <li>Column separators when <a href="/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#allowColumnResizing">allowColumnResizing</a> is enabled.</li>
+            </ul>
+        </td>
     </tr>
     <tr>
         <td>11.5.2.15 Change notification </td>

concepts/05 UI Components/DataGrid/05 Accessibility/15 Keyboard Navigation.md

@@ -1,4 +1,14 @@
-A user can use the following keys to interact with the DataGrid component: 
+DataGrid offers different keyboard controls depending on which action users want to perform.
+
+[note]
+
+- The following DataGrid features do not support the **Ctrl+Home** and **Ctrl+End** shortcuts:
+    - Group summaries
+    - Grouped data
+    - Expanded master-detail interfaces
+- When **scrolling**.[columnRenderingMode](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/scrolling/#columnRenderingMode) is *"virtual"*, the [filter row](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/filterRow/) does not support keyboard navigation.
+
+[/note]
 
 <table class="dx-table full-width">
     <tr>
@@ -104,3 +114,5 @@ A user can use the following keys to interact with the DataGrid component:
 </div>
 
 You can override these shortcuts or create your own. Refer to the following help topic for more information: [Custom Keyboard Navigation](/concepts/05%20UI%20Components/DataGrid/70%20Custom%20Keyboard%20Navigation/00%20Custom%20Keyboard%20Navigation.md '/Documentation/Guide/UI_Components/DataGrid/Custom_Keyboard_Navigation/').
+
+[note] On macOS, Cmd replaces the Ctrl key.

concepts/05 UI Components/TreeList/05 Accessibility/10 Accessibility Standards Compliance.md

@@ -24,7 +24,12 @@ The TreeList component meets a variety of <a href="https://www.access-board.gov/
     <tr>
         <td>11.5.2.12 Execution of available actions</td>
         <td>2.1.1 Keyboard (Level A)</td>
-        <td>Keyboard navigation is not supported for ColumnChooser items in 'drag' mode.</td>
+        <td>
+            <ul>
+                <li>ColumnChooser items in 'drag' mode do not support keyboard navigation.</li>
+                <li>Column resizing does not support keyboard actions (when <a href="/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/#allowColumnResizing">allowColumnResizing</a> is enabled).</li>
+            </ul>
+        </td>
     </tr>
     <tr>
         <td>-</td>
@@ -42,8 +47,9 @@ The TreeList component meets a variety of <a href="https://www.access-board.gov/
         <td>2.5.8 Target Size (Minimum) (Level AA 2.2 only)</td>
         <td>
             <ul>
-                <li>Selection checkboxes and ‘Select all’ checkbox.</li>
+                <li>Selection checkboxes and the ‘Select all’ checkbox.</li>
                 <li>Command buttons and icons.</li>
+                <li>Column separators when <a href="/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/#allowColumnResizing">allowColumnResizing</a> is enabled.</li>
             </ul>    
         </td>
     </tr>

concepts/05 UI Components/TreeList/05 Accessibility/15 Keyboard Navigation.md

@@ -1,4 +1,8 @@
-A user can use the following keys to interact with the TreeList component: 
+TreeList offers different keyboard controls depending on what action users wish to perform.
+
+### Navigation
+
+[note] When **scrolling**.[columnRenderingMode](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/scrolling/#columnRenderingMode) is *"virtual"*, the [filter row](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/filterRow/) does not support keyboard navigation.
 
 <table class="dx-table">
     <tr>
@@ -104,3 +108,5 @@ A user can use the following keys to interact with the TreeList component:
 </div>
 
 You can override these shortcuts or create your own shortcuts using the [onKeyDown](/api-reference/10%20UI%20Components/dxTreeList/1%20Configuration/onKeyDown.md '/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/#onKeyDown') event handler.
+
+[note] On macOS, Cmd replaces the Ctrl key.