Mathkeyboard doesn't work/throws error - Javascript error

[UliPrantz]

Describe the bug
When I press any button on the mathkeyboard nothing occurs on the display but following error is thrown:

JavaScript string was: 'addCmd('9', {isOperator: false})' Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage=ReferenceError: Can't find variable: addCmd, WKJavaScriptExceptionColumnNumber=7, WKJavaScriptExceptionSourceURL=about:blank, NSLocalizedDescription=A JavaScript exception occurred}

To Reproduce
Steps to reproduce the behavior:
Just start the App (in my case iPhone Simulator 11 Pro Max - iOS 13.3) and try to type any kind of Input with the mathkeyboard.

Expected behavior
A clear and concise description of what you expected to happen.

Normally the keyboard expression should appear in the WebView.

Version:

• iPhone Simulator 11 Pro Max - iOS 13.3

[DylanXie123]

I used some packages that require extra settings in iOS devices like webview_flutter and flutter_tex, but I don't have a mac device to test it. Maybe the following steps can help:

• adding a boolean property to the app's Info.plist file, with the key io.flutter.embedded_views_preview and the value YES.
• add following code in your <project-directory>/ios/Runner/Info.plist

<key>NSAppTransportSecurity</key>
  
  <dict>
    <key>NSAllowsArbitraryLoads</key> <true/>
  </dict>

<key>io.flutter.embedded_views_preview</key> <true/> 

[HardVeur]

Ok I will test it if you want to I can contribute more often in the future and make iOS support stable.

Thanks for the advice :)