diff --git a/docs/api/web-contents.md b/docs/api/web-contents.md
index b4f8fe66e214b..9662d75d13c91 100644
--- a/docs/api/web-contents.md
+++ b/docs/api/web-contents.md
@@ -366,6 +366,7 @@ Returns:
   * `key` String - Equivalent to [KeyboardEvent.key][keyboardevent].
   * `code` String - Equivalent to [KeyboardEvent.code][keyboardevent].
   * `isAutoRepeat` Boolean - Equivalent to [KeyboardEvent.repeat][keyboardevent].
+  * `isComposing` Boolean - Equivalent to [KeyboardEvent.isComposing][keyboardevent].
   * `shift` Boolean - Equivalent to [KeyboardEvent.shiftKey][keyboardevent].
   * `control` Boolean - Equivalent to [KeyboardEvent.controlKey][keyboardevent].
   * `alt` Boolean - Equivalent to [KeyboardEvent.altKey][keyboardevent].
diff --git a/shell/common/gin_converters/content_converter.cc b/shell/common/gin_converters/content_converter.cc
index 3d3cc0489f643..489ad9ad8295f 100644
--- a/shell/common/gin_converters/content_converter.cc
+++ b/shell/common/gin_converters/content_converter.cc
@@ -302,6 +302,7 @@ v8::Local<v8::Value> Converter<content::NativeWebKeyboardEvent>::ToV8(
 
   using Modifiers = blink::WebInputEvent::Modifiers;
   dict.Set("isAutoRepeat", (in.GetModifiers() & Modifiers::kIsAutoRepeat) != 0);
+  dict.Set("isComposing", (in.GetModifiers() & Modifiers::kIsComposing) != 0);
   dict.Set("shift", (in.GetModifiers() & Modifiers::kShiftKey) != 0);
   dict.Set("control", (in.GetModifiers() & Modifiers::kControlKey) != 0);
   dict.Set("alt", (in.GetModifiers() & Modifiers::kAltKey) != 0);