chore: fix some js warning (#1276)

Signed-off-by: rogerogers <rogers@rogerogers.com>
Co-authored-by: rogerogers <rogers@rogerogers.com>

Author: GuangmingLuo

layouts/partials/handle-version-switch-404.html

@@ -1,7 +1,7 @@
 <script type='text/javascript'>
   (function() {
     var sameBaseUrlRegExp = new RegExp('^' + location.protocol + '//' + location.host.replace('.', '\\.') + '/.*', 'i');
-    var cloudwegoDocumentationUrlRegExp = new RegExp('^https?://(.+\\.)?cloudwego.io/.*', 'i');
+    var cloudwegoDocumentationUrlRegExp = new RegExp('^https?://([^/]+\\.)?cloudwego\\.io/.*', 'i');
     if (!sameBaseUrlRegExp.test(document.referrer) && cloudwegoDocumentationUrlRegExp.test(document.referrer)) {
       location.replace('/');
     }

static/js/outbound-link.js

@@ -1,12 +1,53 @@
-function outboundLinkInBlank(clipboard) {
-  document.querySelectorAll('a').forEach(function (link) {
-    var href = link.getAttribute('href');
-    if (
-      href &&
-      href.startsWith('http') &&
-      (!href.startsWith('https://www.cloudwego.io') || !href.startsWith('https://www.cloudwego.cn'))
-    ) {
-      link.setAttribute('target', '_blank');
+/**
+ * Extracts the top-level domain from a given hostname.
+ *
+ * @param hostname - The full hostname string from which to extract the top-level domain.
+ * @returns The top-level domain string, or the original hostname if it has two or fewer parts.
+ */
+function getTopLevelDomain(hostname) {
+  if (hostname.startsWith("www.")) {
+    hostname = hostname.substring(4);
+  }
+
+  const parts = hostname.split(".").filter(Boolean);
+  if (parts.length > 2) {
+    return parts.slice(-2).join(".");
+  } else {
+    return hostname;
+  }
+}
+
+/**
+ * Extracts the domain without subdomains from a given URL string.
+ *
+ * @param urlString - The URL string from which to extract the domain without subdomains.
+ * @returns The domain without subdomains if the URL is valid, otherwise null.
+ */
+function getDomainWithoutSubdomains(urlString) {
+  try {
+    const url = new URL(urlString);
+    return getTopLevelDomain(url.hostname);
+  } catch (error) {
+    console.error("Invalid URL:", error);
+    return null;
+  }
+}
+
+function outboundLinkInBlank() {
+  const selfDomains = ["cloudwego.io", "cloudwego.cn"];
+  document.querySelectorAll("a").forEach(function (link) {
+    const href = link.getAttribute("href");
+    if (href && href.startsWith("http")) {
+      try {
+        const url = new URL(href);
+        const host = url.host;
+        const domain = getDomainWithoutSubdomains(host);
+        if (!selfDomains.includes(domain)) {
+          link.setAttribute("target", "_blank");
+        }
+      } catch (e) {
+        console.error("Invalid URL:", href);
+      }
     }
   });
 }