Refactor link handling logic in all.js.

Author: yegor256

js/all.js

@@ -34,10 +34,14 @@ if (typeof($) != 'undefined') {
     }
     $('article a[href]').each(function () {
       const href = $(this).attr('href');
-      if (href.startsWith('http') && !href.includes(location.hostname)) {
-        $(this).addClass('external');
-        $(this).append('<img src="/images/icons/link.svg" class="link" alt="external"/>');
+      if (!href.startsWith('http') || href.includes(location.hostname)) {
+        return;
       }
+      if ($(this).find('img').length > 0) {
+        return;
+      }
+      $(this).addClass('external');
+      $(this).append('<img src="/images/icons/link.svg" class="link" alt="external"/>');
     });
     if ($('.buttons').css('display') !== 'none') {
       $(".button[href!='#']").click(