Add date to locale time string

src/js.rs

@@ -377,6 +377,17 @@ extern {
 extern {
     pub type Date;
     
+    /// The toLocaleTimeString() method returns a string with a language sensitive
+    /// representation of the time portion of this date. The new locales and options
+    /// arguments let applications specify the language whose formatting conventions should be
+    /// used and customize the behavior of the function. In older implementations, which ignore
+    /// the locales and options arguments, the locale used and the form of the string
+    /// returned are entirely implementation dependent.
+    ///
+    /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleTimeString
+    #[wasm_bindgen(method, js_name = toLocaleTimeString)]
+    pub fn to_locale_time_string(this: &Date, locale: JsString) -> JsString;
+
     /// The toString() method returns a string representing
     /// the specified Date object.
     ///

tests/all/js_globals/Date.rs

@@ -2,6 +2,33 @@
 
 use super::project;
 
+#[test]
+fn to_locale_time_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::{Date, JsString};
+
+            #[wasm_bindgen]
+            pub fn to_locale_time_string(this: &Date, locale: JsString) -> JsString {
+                this.to_locale_time_string(locale)
+            }
+        "#)
+        .file("test.ts", r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                let date = new Date('August 19, 1975 23:15:30');
+                assert.equal(wasm.to_locale_time_string(date, 'en-US'), "11:15:30 PM");
+            }
+        "#)
+        .test()
+}
+
 #[test]
 fn to_string() {
     project()