js-sys: Add bindings to WebAssembly.Table.prototype.get

Part of rustwasm#275

Author: fitzgen

crates/js-sys/src/lib.rs

@@ -3061,6 +3061,13 @@ pub mod WebAssembly {
         /// [MDN documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/length)
         #[wasm_bindgen(method, getter, js_namespace = WebAssembly)]
         pub fn length(this: &Table) -> u32;
+
+        /// The `get()` prototype method of the `WebAssembly.Table()` object
+        /// retrieves a function reference stored at a given index.
+        ///
+        /// [MDN documentation](
+        #[wasm_bindgen(method, catch, js_namespace = WebAssembly)]
+        pub fn get(this: &Table, index: u32) -> Result<Function, JsValue>;
     }
 
     // WebAssembly.Memory

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

@@ -127,6 +127,9 @@ fn table_error() {
 fn table() {
     let table = WebAssembly::Table::new(&get_table_object().into()).unwrap();
     assert_eq!(table.length(), 1);
+
+    assert!(table.get(0).is_ok());
+    assert!(table.get(999).is_err());
 }
 
 #[wasm_bindgen_test]