From 74916928be6552aa1e52fcdd1d634382bf7d9515 Mon Sep 17 00:00:00 2001
From: neumayr <neumayr@users.noreply.github.com>
Date: Thu, 14 Jun 2018 16:48:13 +0200
Subject: [PATCH 1/2] add Plugins section to markdown docs

---
 packages/docs/docs/guide/markdown.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/docs/docs/guide/markdown.md b/packages/docs/docs/guide/markdown.md
index b0ef8bed8f..617151e4f6 100644
--- a/packages/docs/docs/guide/markdown.md
+++ b/packages/docs/docs/guide/markdown.md
@@ -263,6 +263,18 @@ It also supports [line highlighting](#line-highlighting-in-code-blocks):
 :::
 
 
+## Plugins
+
+VuePress uses [markdown-it](https://github.com/markdown-it/markdown-it) as the markdown renderer. You can further customize the `markdown-it` instance using the `markdown.plugins` option in `.vuepress/config.js`. The `markdown-it-` prefix is optional and can omit in the list.
+
+``` js
+module.exports = {
+  markdown: {
+    plugins: ['ins', 'mark']
+  }
+}
+```
+
 ## Advanced Configuration
 
 VuePress uses [markdown-it](https://github.com/markdown-it/markdown-it) as the markdown renderer. A lot of the extensions above are implemented via custom plugins. You can further customize the `markdown-it` instance using the `markdown` option in `.vuepress/config.js`:

From d674424a6905d53e0e9c4e9da5e4590ca15da0ff Mon Sep 17 00:00:00 2001
From: neumayr <neumayr@users.noreply.github.com>
Date: Mon, 10 Dec 2018 16:52:29 +0100
Subject: [PATCH 2/2] rebase to work with v1.0.0-alpha

---
 .../markdown/__tests__/plugin.spec.js         | 24 +++++++++++++++++++
 packages/@vuepress/markdown/index.js          | 10 +++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 packages/@vuepress/markdown/__tests__/plugin.spec.js

diff --git a/packages/@vuepress/markdown/__tests__/plugin.spec.js b/packages/@vuepress/markdown/__tests__/plugin.spec.js
new file mode 100644
index 0000000000..498ba0cf20
--- /dev/null
+++ b/packages/@vuepress/markdown/__tests__/plugin.spec.js
@@ -0,0 +1,24 @@
+import { Md } from './util'
+import ins from 'markdown-it-ins'
+import mark from 'markdown-it-mark'
+
+const mdP = Md().use(ins).use(mark)
+// const mdP = Md().set({
+//   markdown: {
+//     plugins: ['ins', 'mark']
+//   }
+// })
+
+const asserts = {
+  'Demo ++inserted++ text.': '<p>Demo <ins>inserted</ins> text.</p>\n',
+  'Demo ==marked== text.': '<p>Demo <mark>marked</mark> text.</p>\n'
+}
+
+describe('plugin', () => {
+  test('should convert markdown w/ custom plugins', () => {
+    for (const input in asserts) {
+      const output = mdP.render(input)
+      expect(output).toBe(asserts[input])
+    }
+  })
+})
diff --git a/packages/@vuepress/markdown/index.js b/packages/@vuepress/markdown/index.js
index 896f22d79c..727e580dc0 100644
--- a/packages/@vuepress/markdown/index.js
+++ b/packages/@vuepress/markdown/index.js
@@ -32,7 +32,8 @@ module.exports = (markdown = {}) => {
     toc,
     lineNumbers,
     beforeInstantiate,
-    afterInstantiate
+    afterInstantiate,
+    plugins
   } = markdown
 
   // allow user config slugify
@@ -117,6 +118,13 @@ module.exports = (markdown = {}) => {
 
   module.exports.dataReturnable(md)
 
+  if (plugins) {
+    markdown.plugins.forEach(function (plugin) {
+      plugin = plugin.replace('markdown-it-', '')
+      md.use(require(`markdown-it-${plugin}`))
+    })
+  }
+
   // expose slugify
   md.slugify = slugify