diff --git a/layouts/partials/comments/provider/gitalk.html b/layouts/partials/comments/provider/gitalk.html
index 54bfcba..ac77fc6 100644
--- a/layouts/partials/comments/provider/gitalk.html
+++ b/layouts/partials/comments/provider/gitalk.html
@@ -18,9 +18,10 @@
         proxy: {{- .proxy -}},
     });
     (function () {
-        if (
-            ["localhost", "127.0.0.1"].indexOf(window.location.hostname) != -1
-        ) {
+        const excludedHosts = ["localhost", "127.0.0.1"];
+        const hostname = window.location.hostname;
+
+        if (excludedHosts.includes(hostname)) {
             document.getElementById("gitalk-container").innerHTML =
                 "Gitalk comments not available by default when the website is previewed locally.";
             return;