pragma Singleton AND import of the module itself results in endless loop / browser crash

module MyModule
singleton Colors 1.0       Colors.qml
singleton TypeDef 1.0      TypeDef.qml

pragma Singleton
import QtQuick 2.5 

QtObject { 
    readonly property color greyBlue: "#485058" 
    readonly property color darkBlue: "#2e3439" 
}

pragma Singleton
import QtQuick 2.5 
import MyModule 1.0   // this construct works in desktop environments but unfortunately not with Web Assembly

QtObject { 
     function getColor(input) 
     {
       if(........)         
          return Colors.greyBlue    
       else
          return Colors.darkBlue 
      }
}