Add bindings for RegExp.$1-$9

crates/js-sys/src/lib.rs

@@ -2168,6 +2168,30 @@ extern {
     #[wasm_bindgen(method, getter)]
     pub fn multiline(this: &RegExp) -> bool;
 
+    /// The non-standard $1, $2, $3, $4, $5, $6, $7, $8, $9 properties
+    /// are static and read-only properties of regular expressions
+    /// that contain parenthesized substring matches.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/n
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$1")]
+    pub fn n1() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$2")]
+    pub fn n2() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$3")]
+    pub fn n3() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$4")]
+    pub fn n4() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$5")]
+    pub fn n5() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$6")]
+    pub fn n6() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$7")]
+    pub fn n7() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$8")]
+    pub fn n8() -> JsString;
+    #[wasm_bindgen(static_method_of = RegExp, getter, js_name = "$9")]
+    pub fn n9() -> JsString;
+
     /// The RegExp constructor creates a regular expression object for matching text with a pattern.
     ///
     /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

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

@@ -3,7 +3,6 @@ use js_sys::*;
 
 #[wasm_bindgen_test]
 fn exec() {
-
     let re = RegExp::new("quick\\s(brown).+?(jumps)", "ig");
     let result = re.exec("The Quick Brown Fox Jumps Over The Lazy Dog");
 
@@ -76,6 +75,21 @@ fn multiline() {
     assert!(re.multiline());
 }
 
+#[wasm_bindgen_test]
+fn n1_to_n9() {
+    let re = RegExp::new(r"(\w+)\s(\w+)\s(\w+)\s(\w+)\s(\w+)\s(\w+)\s(\w+)\s(\w+)\s(\w+)", "");
+    re.test("The Quick Brown Fox Jumps Over The Lazy Dog");
+    assert_eq!(RegExp::n1(), "The");
+    assert_eq!(RegExp::n2(), "Quick");
+    assert_eq!(RegExp::n3(), "Brown");
+    assert_eq!(RegExp::n4(), "Fox");
+    assert_eq!(RegExp::n5(), "Jumps");
+    assert_eq!(RegExp::n6(), "Over");
+    assert_eq!(RegExp::n7(), "The");
+    assert_eq!(RegExp::n8(), "Lazy");
+    assert_eq!(RegExp::n9(), "Dog");
+}
+
 #[wasm_bindgen_test]
 fn new() {
     let re = RegExp::new("foo", "");