I am using MVC .net core to populate my ViewModel. I am trying to build a chart and a canvas is not being created if the value is null. This is working fine.

regardless if I add a test in the script section to test for null

if (Model.AssessmentDetailByCategChart!= null) 
{

or testing for element exists (and it should not )

if ($('#canvasRadarTech').length > 0) {

I have this crash. Could you please help with the proper syntax?

If I add a "@" in front of the model, then the rest of the code is not compiling.