Adding user-defined properties to objects does not work

[jspanchu]

One cannot add their own properties to the object returned be vtk.vtkClassName().

const vtk = await window.vtkReady;
const actor = vtk.vtkActor();
actor.myProperty = 1010;
console.log(actor.myProperty );

Console prints:

async(...A)=>i.decorateResult(await e.invoke(n,G(s),i.decorateArgs(A)))

because the proxy logic fails to find a C++ property myProperty on vtkActor. It assumes myProperty is a method, so it wraps around wasm.invoke.

What will help is if the object manager has API to find out if a method exists or not. I think it is not very hard to do thi.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/apply might also help in combination with get.

[jourdain]

With the work you are doing for the TypeScript annotation, we should be able to incorporate that into some runtime check too.