Getters/Setters for fields

guide/src/reference/attributes/on-rust-exports/getter-and-setter.md

@@ -0,0 +1,45 @@
+# `getter` and `setter`
+
+It is also possible to interact with `Rust` types either by using fields accessors. For example, the following:
+
+```rust
+#[wasm_bindgen]
+extern "C" {
+    fn check_modify_and_return_baz_in_js_fields(baz: Baz) -> Baz;
+}
+
+#[wasm_bindgen_test]
+fn create_and_check_baz_in_rust() {
+    let baz = check_modify_and_return_baz_in_js_fields(Baz { field: 123 });
+    assert_eq!(baz.field.unwrap(), 456);
+}
+
+#[wasm_bindgen]
+#[derive(Default)]
+pub struct Baz {
+    field: i32,
+}
+
+#[wasm_bindgen]
+impl Baz {
+    #[wasm_bindgen(getter)]
+    pub fn field(&self) -> i32 {
+        self.field
+    }
+
+    #[wasm_bindgen(setter = field)]
+    pub fn set_field(&mut self, field: i32) {
+        self.field = field;
+    }
+}
+```
+
+Can be combined in `JavaScript` like in this snippet:
+
+```js
+check_modify_and_return_baz_in_js_fields = (baz) => {
+    console.log(baz.field, 123);
+    baz.field = 456;
+    return baz;
+};
+```