From 9b23cf46e233615b7304c50d7fe58090fc9d781d Mon Sep 17 00:00:00 2001
From: Clayblockunova <41379534+Clayblockunova@users.noreply.github.com>
Date: Tue, 16 Jul 2024 16:41:32 +0800
Subject: [PATCH] Update features.js

---
 src/lib/features.js | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/lib/features.js b/src/lib/features.js
index 169f7fbb..f5e487f2 100644
--- a/src/lib/features.js
+++ b/src/lib/features.js
@@ -129,6 +129,21 @@ var featureInfos =
             return available;
         },
     },
+    ASYNC_FUNCTION:
+    {
+        description: 'Support for async functions, which return `Promise` object.',
+        check:
+        function ()
+        {
+            try
+            {
+                Function('return async function(){}');
+                return true;
+            }
+            catch (error)
+            { }
+        },
+    },
     ARROW:
     {
         description: 'Support for arrow functions.',
@@ -506,6 +521,16 @@ var featureInfos =
             return available;
         },
     },
+    JAPANESE_INFINITY:
+    {
+        description: 'Japanese string representation of Infinity ended with "∞".',
+        check:
+        function ()
+        {
+            var available = Infinity.toLocaleString('ja').slice(-1) === '∞';
+            return available;
+        },
+    },
     LOCALE_INFINITY:
     {
         description: 'Language sensitive string representation of Infinity as "∞".',