Keyboard event event.key is unidentified on android webview

Try load webview with this html on react native

    <div
          tabindex="1"
          contenteditable="true"
          id="test-test"
          style="width: 300px; height: 300px;"
        >
   </div>
   <script>
          document
            .getElementById(“test-test”)
            .addEventListener(“keydown”, function (e) {
              alert(e.key || e.keyCode || “empty”);
            });
   </script>

event.key is unidentified or event.keyCode is 229 always

from Keyboard event event.key is unidentified on android webview