From 4f883ce61ccc1c3abb2c7f2fb7eb1f8411615424 Mon Sep 17 00:00:00 2001
From: ULIVZ <472590061@qq.com>
Date: Tue, 8 May 2018 01:02:44 +0800
Subject: [PATCH 1/2] feat: support custom attributes for external links in
 markdown

---
 lib/markdown/link.js | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/lib/markdown/link.js b/lib/markdown/link.js
index 969fedde75..b2f0bacaae 100644
--- a/lib/markdown/link.js
+++ b/lib/markdown/link.js
@@ -1,6 +1,7 @@
 // markdown-it plugin for:
 // 1. adding target="_blank" to external links
 // 2. converting internal links to <router-link>
+const querystring = require('querystring')
 
 module.exports = md => {
   let hasOpenRouterLink = false
@@ -10,12 +11,30 @@ module.exports = md => {
     const hrefIndex = token.attrIndex('href')
     if (hrefIndex >= 0) {
       const link = token.attrs[hrefIndex]
-      const href = link[1]
+      // resolve link query params
+      let href = link[1].trim()
+      let query
+      if (href.startsWith('(')) {
+        const queryEndIndex = href.indexOf(')')
+        link[1] = href.slice(queryEndIndex + 1)
+        query = href.slice(1, queryEndIndex)
+        href = link[1]
+      }
+      const queryOb = querystring.parse(query)
       const isExternal = /^https?:/.test(href)
       const isSourceLink = /(\/|\.md|\.html)(#.*)?$/.test(href)
       if (isExternal) {
-        addAttr(token, 'target', '_blank')
-        addAttr(token, 'rel', 'noopener noreferrer')
+        for (const attrKey in queryOb) {
+          if (queryOb[attrKey]) {
+            addAttr(token, attrKey, queryOb[attrKey])
+          }
+        }
+        if (queryOb.target === undefined) {
+          addAttr(token, 'target', '_blank')
+        }
+        if (!queryOb.rel === undefined) {
+          addAttr(token, 'rel', 'noopener noreferrer')
+        }
       } else if (isSourceLink) {
         hasOpenRouterLink = true
         tokens[idx] = toRouterLink(token, link)
@@ -64,3 +83,4 @@ function addAttr (token, name, val) {
     token.attrs[targetIndex][1] = val
   }
 }
+

From f16bcdacc6292247d1f42da9bbbdd4b79b5b7959 Mon Sep 17 00:00:00 2001
From: ULIVZ <472590061@qq.com>
Date: Tue, 8 May 2018 01:11:44 +0800
Subject: [PATCH 2/2] chore: tweaks

---
 lib/markdown/link.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/markdown/link.js b/lib/markdown/link.js
index b2f0bacaae..5dccc05d0e 100644
--- a/lib/markdown/link.js
+++ b/lib/markdown/link.js
@@ -25,14 +25,14 @@ module.exports = md => {
       const isSourceLink = /(\/|\.md|\.html)(#.*)?$/.test(href)
       if (isExternal) {
         for (const attrKey in queryOb) {
-          if (queryOb[attrKey]) {
+          if (queryOb[attrKey].length) {
             addAttr(token, attrKey, queryOb[attrKey])
           }
         }
         if (queryOb.target === undefined) {
           addAttr(token, 'target', '_blank')
         }
-        if (!queryOb.rel === undefined) {
+        if (queryOb.rel === undefined) {
           addAttr(token, 'rel', 'noopener noreferrer')
         }
       } else if (isSourceLink) {