How to Define Function Input Parameters with Assert for Code Generation?

I am trying to use "assert" to define (precondition statement) parameters to a function for codegen to javascript via the use of the "Generate JavaScript Using MATLAB Coder" add-on. I could use the MATLAB internal tool to help convert to c/cpp, but I want the output to be JavaScript and this add-on sounds good!. Either way, I seem to be doing something wrong.

If I build with the assert line commented out, I get the error on the function declaration line 2: ??? Type of input argument 'myInteger' for function 'myTestFunction' not specified. Use -args or preconditioning statements to specify input types.

If I build with the assert line uncommented, I get the error on the assert line 3: ??? Assert will always fail. To delay detection until run time use coder.ignoreConst on the condition.

I am referencing the following pages on "assert" usage:

https://www.mathworks.com/help/fixedpoint/ug/define-input-properties-programmatically-in-the-matlab-file.html

https://www.mathworks.com/help/coder/ug/primary-function-input-specification.html

Thank you for the help!

-------------------------myfunction.m----------------------

%#codegen

function myTestFunction(myInteger)

%assert(isa(myInteger,'int32'));

tempInteger2 = myInteger;

end

------------------------start.m--------------------------------

function start()

integer1 = 1;

integer2 = integer1;

myTestFunction(integer2);

end