feat: markdown anchors

server/modules/rendering/markdown-core/renderer.js

@@ -1,5 +1,7 @@
 const md = require('markdown-it')
+const mdAnchor = require('markdown-it-anchor')
 const _ = require('lodash')
+const uslug = require('uslug')
 
 const quoteStyles = {
   Chinese: '””‘’',
@@ -29,6 +31,14 @@ module.exports = {
       }
     })
 
+    mkdown.use(mdAnchor, {
+      slugify: s => uslug(s),
+      permalink: true,
+      permalinkClass: 'toc-anchor',
+      permalinkSymbol: '¶',
+      permalinkBefore: true
+    })
+
     for (let child of this.children) {
       const renderer = require(`../${_.kebabCase(child.key)}/renderer.js`)
       renderer.init(mkdown, child.config)