Add Intl.getCanonicalLocales

src/8.intl.js

@@ -1 +1,23 @@
+import {
+    defineProperty,
+} from "./util.js";
+
+import {
+  CanonicalizeLocaleList
+} from "./9.negotiation.js";
+
 export const Intl = {};
+
+function GetCanonicalLocales (locales) {
+  let codes = CanonicalizeLocaleList(locales);
+  let result = [];
+  for (let code in codes) {
+    result.push(codes[code]);
+  }
+  return result;
+}
+
+defineProperty(Intl, 'getCanonicalLocales', {
+    configurable: true,
+    value: GetCanonicalLocales,
+});