How to send a value as None in extracting web::Json<MyForm>

[cubicYYY]

pub struct MyForm {
    pub latitude: Option<Option<f64>>,
}

What I mean: "None as 'not provided', Some(None) as a Null value to proceed".
However when I trying to specify it by passing {"latitude":null} to the API endpoint, it has the same effect as not provided (yes, this makes sense when it comes to JavaScript).
My question is, how should I make it possible? Some special ways to pass the args in the JSON form or something to do in the rust code?

[robjtede]

The easiest solution I can advise is to look at the js-option crate in order to achieve the tri-state semantics.

[cubicYYY]

That is a neat solution. Thank you!