diff --git a/src/js.rs b/src/js.rs index 934000f4..b35ef08a 100644 --- a/src/js.rs +++ b/src/js.rs @@ -628,6 +628,12 @@ extern { /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet #[wasm_bindgen(constructor)] pub fn new() -> WeakSet; + + /// The has() method returns a boolean indicating whether an object exists in a WeakSet or not. + /// + /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet/has + #[wasm_bindgen(method)] + pub fn has(this: &WeakSet, value: Object) -> bool; } // JsString diff --git a/tests/all/js_globals/WeakSet.rs b/tests/all/js_globals/WeakSet.rs index 46f829fd..40b4be5a 100644 --- a/tests/all/js_globals/WeakSet.rs +++ b/tests/all/js_globals/WeakSet.rs @@ -26,4 +26,36 @@ fn new() { } "#) .test() +} + +#[test] +fn has() { + project() + .file("src/lib.rs", r#" + #![feature(proc_macro, wasm_custom_section)] + + extern crate wasm_bindgen; + use wasm_bindgen::prelude::*; + use wasm_bindgen::js; + + #[wasm_bindgen] + pub fn has_value(this: &js::WeakSet, value: js::Object) -> bool { + this.has(value) + } + "#) + .file("test.ts", r#" + import * as assert from "assert"; + import * as wasm from "./out"; + + export function test() { + let set = new WeakSet(); + let value = {some: "value"}; + set.add(value); + assert.equal(wasm.has_value(set, value), true); + + let nonex = {nonexistent: "value"}; + assert.equal(wasm.has_value(set, nonex), false); + } + "#) + .test() } \ No newline at end of file