rel="noopener"

Author: yyx990803

Diff for: lib/default-theme/NavLinks.vue

@@ -10,7 +10,8 @@
     <a v-if="githubLink"
       :href="githubLink"
       class="github-link"
-      target="_blank">
+      target="_blank"
+      rel="noopener">
       Github
       <OutboundLink/>
     </a>

Diff for: lib/markdown/link.js

@@ -14,12 +14,8 @@ module.exports = md => {
       const isExternal = /^https?:/.test(href)
       const isSourceLink = /(\/|\.md|\.html)(#[\w-]*)?$/.test(href)
       if (isExternal) {
-        const targetIndex = token.attrIndex('target')
-        if (targetIndex < 0) {
-          token.attrPush(['target', '_blank'])
-        } else {
-          token.attrs[targetIndex][1] = '_blank'
-        }
+        addAttr(token, 'target', '_blank')
+        addAttr(token, 'rel', 'noopener')
       } else if (isSourceLink) {
         hasOpenRouterLink = true
         tokens[idx] = toRouterLink(token, link)
@@ -58,3 +54,12 @@ module.exports = md => {
     return self.renderToken(tokens, idx, options)
   }
 }
+
+function addAttr (token, name, val) {
+  const targetIndex = token.attrIndex(name)
+  if (targetIndex < 0) {
+    token.attrPush([name, val])
+  } else {
+    token.attrs[targetIndex][1] = val
+  }
+}