diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index 6cb8c9d4..dfb45d66 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -1890,6 +1890,30 @@ extern "C" {
     #[derive(Clone, Debug)]
     pub type Object;
 
+    /// The Object.assign() method is used to copy the values of all enumerable
+    /// own properties from one or more source objects to a target object. It
+    /// will return the target object.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
+    #[wasm_bindgen(static_method_of = Object)]
+    pub fn assign(target: &Object, source: &Object) -> Object;
+
+    /// The Object.assign() method is used to copy the values of all enumerable
+    /// own properties from one or more source objects to a target object. It
+    /// will return the target object.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
+    #[wasm_bindgen(static_method_of = Object, js_name = assign)]
+    pub fn assign2(target: &Object, source1: &Object, source2: &Object) -> Object;
+
+    /// The Object.assign() method is used to copy the values of all enumerable
+    /// own properties from one or more source objects to a target object. It
+    /// will return the target object.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
+    #[wasm_bindgen(static_method_of = Object, js_name = assign)]
+    pub fn assign3(target: &Object, source1: &Object, source2: &Object, source3: &Object) -> Object;
+
     /// The `Object.freeze()` method freezes an object: that is, prevents new
     /// properties from being added to it; prevents existing properties from
     /// being removed; and prevents existing properties, or their enumerability,
diff --git a/crates/js-sys/tests/wasm/Object.rs b/crates/js-sys/tests/wasm/Object.rs
index da245a97..ee448ea8 100644
--- a/crates/js-sys/tests/wasm/Object.rs
+++ b/crates/js-sys/tests/wasm/Object.rs
@@ -36,6 +36,33 @@ fn new() {
     assert!(JsValue::from(Object::new()).is_object());
 }
 
+
+#[wasm_bindgen_test]
+fn assign() {
+    let a = JsValue::from("a");
+    let b = JsValue::from("b");
+    let c = JsValue::from("c");
+
+    let target = Object::new();
+    Reflect::set(target.as_ref(), a.as_ref(), a.as_ref());
+
+    let src1 = Object::new();
+    Reflect::set(src1.as_ref(), &a, &c);
+
+    let src2 = Object::new();
+    Reflect::set(src2.as_ref(), &b, &b);
+
+    let src3 = Object::new();
+    Reflect::set(src3.as_ref(), &c, &c);
+
+    let res = Object::assign3(&target, &src1, &src2, &src3);
+
+    assert!(Object::is(target.as_ref(), res.as_ref()));
+    assert_eq!(Reflect::get(target.as_ref(), &a), c);
+    assert_eq!(Reflect::get(target.as_ref(), &b), b);
+    assert_eq!(Reflect::get(target.as_ref(), &c), c);
+}
+
 #[wasm_bindgen_test]
 fn has_own_property() {
     assert!(foo_42().has_own_property(&"foo".into()));