chore(Dialog): add kb for focusable content

knowledge-base/dialog-close-on-esc.md

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+---
+title: How to Close the Dialog on ESC When its Content is Focused
+description: Learn how to enable closing the Dialog on ESC key after focusing the content by adding a focusable wrapper.
+type: how-to
+page_title: How to Close the Dialog on ESC When its Content is Focused
+tags: Dialog, ESC, Keyboard, Focus
+slug: dialog-kb-close-on-esc
+---
+
+## Description
+
+This knowledge base article answers to the following questions: 
+
+* How to make Dialog responsive to keyboard events when content is clicked?
+* Why doesn't ESC key work after clicking inside Dialog content?
+* How to maintain keyboard functionality in Dialog after focus changes?
+
+When you click or focus inside the Dialog content area, the focus moves away from the Dialog component. As a result, the Dialog does not receive keyboard events, and pressing the `ESC` key does not close it. This behavior occurs because the keydown events are not invoked for the Dialog when the focus is on another element or the body tag.
+
+## Solution
+
+To ensure the Dialog closes on `ESC` even after focusing the content, wrap the Dialog content in a `div` with `tabindex="0"`. This makes the content wrapper focusable and allows keyboard events to be captured. Add custom styling to handle the focus state and preserve the existing content padding.
+
+>caption Example of Implementing a Focusable Wrapper with Visual Indication
+
+````RAZOR
+<TelerikDialog @bind-Visible="@DialogVisible"
+               Width="500px"
+               Height="300px"
+               Class="focusable-content">
+    <DialogContent>
+        <div tabindex="0" class="dialog-content-wrapper">
+            <p>Click anywhere in this content area, then press ESC to close the dialog.</p>
+        </div>
+    </DialogContent>
+    <DialogButtons>
+        <TelerikButton OnClick="@CloseDialog" ThemeColor="@ThemeConstants.Button.ThemeColor.Primary">Close</TelerikButton>
+    </DialogButtons>
+</TelerikDialog>
+
+<TelerikButton OnClick="@OpenDialog">Open Dialog</TelerikButton>
+
+<style>
+    /* Remove default Dialog content padding to let wrapper handle it */
+    .focusable-content .k-dialog-content {
+        padding: 0;
+    }
+
+    /* Focusable wrapper that fills the entire Dialog content area */
+    .focusable-content .dialog-content-wrapper {
+        padding: 1rem;
+        outline: none;
+        height: 100%;
+        box-sizing: border-box;
+        transition: background-color 0.2s ease;
+    }
+
+        /* Visual indication when the wrapper is focused */
+        .focusable-content .dialog-content-wrapper:focus {
+            background-color: rgba(0, 123, 255, 0.05);
+        }
+</style>
+
+@code {
+    private bool DialogVisible { get; set; }
+    private string SampleText { get; set; } = string.Empty;
+
+    private void OpenDialog()
+    {
+        DialogVisible = true;
+    }
+
+    private void CloseDialog()
+    {
+        DialogVisible = false;
+    }
+}
+````