input show error when display:none

[yifei8]

Affected version

0.12.0 +

No same issues found.

• Yes, I search all issues but not found.

Steps to Reproduce

在页面中添加input元素，然后将display:none

Code example

Expected results

和H5一样正常展示

Actual results

Null check operator used on a null value
#0      WidgetElement.willAttachRenderer (package:webf/src/widget/widget_element.dart:87)
#1      Element.attachTo (package:webf/src/dom/element.dart:864)
#2      Element.ensureChildAttached (package:webf/src/dom/element.dart:937)
#3      Element.didAttachRenderer (package:webf/src/dom/element.dart:575)
#4      Element.attachTo (package:webf/src/dom/element.dart:880)
#5      Element.appendChild (package:webf/src/dom/element.dart:967)
#6      WebFViewController.insertAdjacentNode (package:webf/src/launcher/controller.dart:483)
 #7      flushUICommand (package:webf/src/bridge/to_native.dart:481)
#8      WebFViewController._postFrameCallback (package:webf/src/launcher/controller.dart:216)
#9      SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144)
#10     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1089)
#11     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/bindi