docs(keyboard) add note regarding event handler

lvgl · Jun 23, 2021 · 255f729 · 255f729
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diff --git a/docs/widgets/extra/keyboard.md b/docs/widgets/extra/keyboard.md
@@ -54,6 +54,13 @@ Keep in mind that using following keywords will have the same effect as with the
 
 The keyboard has a **default event handler** callback called `lv_keyboard_def_event_cb`, which handles the button pressing, map changing, the assigned text area, etc. You can remove it and replace it with a custom event handler if you wish.
 
+```eval_rst
+.. note::
+   In 8.0 and newer, adding an event handler to the keyboard does not remove the default event handler.
+   This behavior differs from v7, where adding an event handler would always replace the previous one.
+```
+
+
 Learn more about [Events](/overview/event).
 
 ## Keys