js-sys: Add bindings for Symbol.unscopables

crates/js-sys/src/lib.rs

@@ -3203,6 +3203,14 @@ extern "C" {
     #[wasm_bindgen(method, js_name = toString)]
     pub fn to_string(this: &Symbol) -> JsString;
 
+    /// The Symbol.unscopables well-known symbol is used to specify an object
+    /// value of whose own and inherited property names are excluded from the
+    /// with environment bindings of the associated object.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/unscopables
+    #[wasm_bindgen(static_method_of = Symbol, getter, structural)]
+    pub fn unscopables() -> Symbol;
+
     /// The valueOf() method returns the primitive value of a Symbol object.
     ///
     /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/valueOf

crates/js-sys/tests/wasm/Symbol.rs

@@ -99,6 +99,11 @@ fn to_string() {
     assert_eq!(gensym("desc".into()).to_string(), "Symbol(desc)");
 }
 
+#[wasm_bindgen_test]
+fn unscopables() {
+    assert_eq!(Symbol::unscopables().to_string(), "Symbol(Symbol.unscopables)");
+}
+
 #[wasm_bindgen_test]
 fn value_of() {
     let a = Symbol::for_("foo");