Link external test.

_includes/button.html

@@ -4,7 +4,7 @@
 {% if button.link or button.icon or button.text %}
   <div class="button-wrapper">
     <a
-      class="button" target="_blank"
+      class="button"
       href="{{ button.link | replace: "$LINK", button.link | relative_url }}"
       {% if button.tooltip %}
         data-tooltip="{{ button.tooltip }}"

_scripts/ext-links.js

@@ -0,0 +1,20 @@
+/*
+  make all external links open in a new tab
+*/
+
+{
+  const onLoad = () => {
+    // for each link
+    const links = document.querySelectorAll("a");
+    for (const link of links)
+      try {
+        // if link absolute and different domain
+        if (new URL(link.href).hostname !== new URL(window.location).hostname)
+          // make link open in new tab
+          link.setAttribute("target", "_blank");
+      } catch (error) {}
+  };
+
+  // after page loads
+  window.addEventListener("load", onLoad);
+}