js_class = "Blah"
The js_class
attribute can be used in conjunction with the method
attribute
to bind methods of imported JavaScript classes that have been renamed on the
Rust side.
#![allow(unused_variables)]
fn main() {
#[wasm_bindgen]
extern "C" {
// We don't want to import JS strings as `String`, since Rust already has a
// `String` type in its prelude, so rename it as `JsString`.
#[wasm_bindgen(js_name = String)]
type JsString;
// This is a method on the JavaScript "String" class, so specify that with
// the `js_class` attribute.
#[wasm_bindgen(method, js_class = "String", js_name = charAt)]
fn char_at(this: &JsString, index: u32) -> JsString;
}
}