From 36e15149c7877839b7dbd0afd8877e7213b2eb9b Mon Sep 17 00:00:00 2001
From: Nick Fitzgerald <fitzgen@gmail.com>
Date: Fri, 10 Aug 2018 13:45:39 -0700
Subject: [PATCH] js-sys: Add bindings for `TypeError`

---
 crates/js-sys/src/lib.rs              | 19 +++++++++++++++++++
 crates/js-sys/tests/wasm/TypeError.rs | 14 ++++++++++++++
 crates/js-sys/tests/wasm/main.rs      |  1 +
 3 files changed, 34 insertions(+)
 create mode 100644 crates/js-sys/tests/wasm/TypeError.rs

diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index 3bdb3a0f..aaa3080b 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -2517,6 +2517,25 @@ extern {
     pub fn new(message: &str) -> SyntaxError;
 }
 
+// TypeError
+#[wasm_bindgen]
+extern {
+    /// The TypeError object represents an error when a value is not of the
+    /// expected type.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
+    #[wasm_bindgen(extends = Error)]
+    #[derive(Clone, Debug)]
+    pub type TypeError;
+
+    /// The TypeError object represents an error when a value is not of the
+    /// expected type.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
+    #[wasm_bindgen(constructor)]
+    pub fn new(message: &str) -> TypeError;
+}
+
 // Uint8Array
 #[wasm_bindgen]
 extern "C" {
diff --git a/crates/js-sys/tests/wasm/TypeError.rs b/crates/js-sys/tests/wasm/TypeError.rs
new file mode 100644
index 00000000..e82cf091
--- /dev/null
+++ b/crates/js-sys/tests/wasm/TypeError.rs
@@ -0,0 +1,14 @@
+use wasm_bindgen::JsValue;
+use wasm_bindgen_test::*;
+use wasm_bindgen::JsCast;
+use js_sys::*;
+
+#[wasm_bindgen_test]
+fn type_error() {
+    let error = TypeError::new("msg");
+    assert!(error.is_instance_of::<TypeError>());
+    assert!(error.is_instance_of::<Error>());
+
+    let base: &Error = error.as_ref();
+    assert_eq!(JsValue::from(base.message()), "msg");
+}
diff --git a/crates/js-sys/tests/wasm/main.rs b/crates/js-sys/tests/wasm/main.rs
index e3b6ec90..faef8e52 100755
--- a/crates/js-sys/tests/wasm/main.rs
+++ b/crates/js-sys/tests/wasm/main.rs
@@ -33,6 +33,7 @@ pub mod Set;
 pub mod SetIterator;
 pub mod Symbol;
 pub mod SyntaxError;
+pub mod TypeError;
 pub mod TypedArray;
 pub mod UriError;
 pub mod WeakMap;