Have this example problem ?

[tu6ge]

let global = cx.global()
    .get(&mut cx, "URL")?
    .downcast_or_throw::<JsFunction, _>(&mut cx)?;
let url: Handle<JsString> = cx.string("https://neon-bindings.com");
let result = ctor.construct(&mut cx, vec![url]);

I find global is not used, and next ctor is not definition