method
The method
attribute allows you to describe methods of imported JavaScript objects. It is applied on a function that has this
as its first parameter, which is a shared reference to an imported JavaScript type.
#[wasm_bindgen] extern "C" { type Set; #[wasm_bindgen(method)] fn has(this: &Set, element: &JsValue) -> bool; }
This generates a has
method on Set
in Rust, which invokes the Set.prototype.has
method in JavaScript.
let set: Set = ...; let elem: JsValue = ...; if set.has(&elem) { ... }