Bindings for Array.prototype.toLocaleString()

src/js.rs

@@ -301,6 +301,14 @@ extern "C" {
     #[wasm_bindgen(method)]
     pub fn sort(this: &Array) -> Array;
 
+    /// The toLocaleString() method returns a string representing the elements of the array. 
+    /// The elements are converted to Strings using their toLocaleString methods and these
+    /// Strings are separated by a locale-specific String (such as a comma “,”).
+    /// 
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/toLocaleString
+    #[wasm_bindgen(method, js_name = toLocaleString)]
+    pub fn to_locale_string(this: &Array, locales: &JsValue, options: &JsValue) -> JsString;
+
     /// The toString() method returns a string representing the specified array
     /// and its elements.
     ///

tests/all/js_globals/Array.rs

@@ -934,4 +934,37 @@ fn find_index() {
             "#,
         )
         .test()
+}
+
+#[test]
+fn to_locale_string() {
+    project()
+        .file(
+            "src/lib.rs",
+            r#"
+                #![feature(proc_macro, wasm_custom_section)]
+
+                extern crate wasm_bindgen;
+                use wasm_bindgen::prelude::*;
+                use wasm_bindgen::js;
+                use JsValue;
+
+                #[wasm_bindgen]
+                pub fn array_to_locale_string(array: &js::Array, locale: &JsValue, options: &JsValue) -> js::JsString {
+                    array.to_locale_string(locale, options)
+                }
+            "#,
+        )
+        .file(
+            "test.js",
+            r#"
+                import * as assert from "assert";
+                import * as wasm from "./out";
+
+                export function test() {
+                    assert.equal(wasm.array_to_locale_string([1, 'a', new Date('21 Dec 1997 14:12:00 UTC')], 'en', {timeZone: 'UTC'}), '1,a,12/21/1997, 2:12:00 PM');
+                }
+            "#,
+        )
+        .test()
 }