请问 这个排序，点击才会生效，为啥render的时候不生效?

onMouseDown={(e) => { e.preventDefault(); return false; }}

defaultValue="lucy"
style={{ width: 120 }}
dropdownRender={(menu, props) => (
  <div>
    {menu}
    <Divider style={{ margin: "4px 0" }} />
    <div
      style={{ padding: "8px", cursor: "pointer" }}
      onClick={() => {
        console.log("Add item onClick...不生效");
      }}

      <Icon type="plus" /> Add item
    </div>
  </div>
)}

<Option value="jack">Jack</Option>
<Option value="lucy">Lucy</Option>