Ternary operator issues

[Janatbek]

after upgrading to "syncfusion-javascript": "^16.2.0-mu.4" we are facing an issue that the page is not opening at all on IE 11
the console error says

clicking the error it brings to Microsoft Docs Page
The application opens fine in Chrome but won't load in IE

the Tech stack: Angular, c#

some sample code where it might break:

import {EJComponents} from 'ej-angular2/src/ej/core';
declare var ej: any;

and in diagram settings:

this.vizLayout = {
      type: 'hierarchicaltree',
      marginY: 50,
      horizontalSpacing: 30,
      verticalSpacing: 40
    };
    this.vizPageSettings = {
      multiplePage: false,
      scrollLimit: 'diagram'
    };
    this.vizSnapSettings = {
      snapConstraints: 'none'
    };
    this.vizConstraints = ej.datavisualization.Diagram.DiagramConstraints.Default;
    this.vizTool = ej.datavisualization.Diagram.Tool.ZoomPan;
  }

If I put debugger before this setting the application opens fine and breaks after setup,
but If I remove debugger, the app won't load