support md footnotes

.eleventy.js

@@ -1,6 +1,7 @@
 const syntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight')
 const markdownIt = require('markdown-it')
 const markdownItAnchor = require('markdown-it-anchor')
+const markdownItFootnote = require('markdown-it-footnote')
 const filters = require('./config/filters.js')
 
 module.exports = function (eleventyConfig) {
@@ -54,6 +55,7 @@ module.exports = function (eleventyConfig) {
             class: 'header-anchor',
         }),
     })
+    md.use(markdownItFootnote)
     eleventyConfig.setLibrary('md', md)
 
     // asset_img shortcode

package.json

@@ -34,6 +34,7 @@
         "eleventy-rss-helper": "^1.2.1",
         "markdown-it": "^12.3.2",
         "markdown-it-anchor": "^8.4.1",
+        "markdown-it-footnote": "^3.0.3",
         "tailwind-dracula": "^1.1.0",
         "tailwindcss": "^3.0.18"
     }

yarn.lock

@@ -1720,6 +1720,11 @@ markdown-it-anchor@^8.4.1:
   resolved "https://registry.yarnpkg.com/markdown-it-anchor/-/markdown-it-anchor-8.6.7.tgz#ee6926daf3ad1ed5e4e3968b1740eef1c6399634"
   integrity sha512-FlCHFwNnutLgVTflOYHPW2pPcl2AACqVzExlkGQNsi4CJgqOHN7YTgDd4LuhgN1BFO3TS0vLAruV1Td6dwWPJA==
 
+markdown-it-footnote@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/markdown-it-footnote/-/markdown-it-footnote-3.0.3.tgz#e0e4c0d67390a4c5f0c75f73be605c7c190ca4d8"
+  integrity sha512-YZMSuCGVZAjzKMn+xqIco9d1cLGxbELHZ9do/TSYVzraooV8ypsppKNmUJ0fVH5ljkCInQAtFpm8Rb3eXSrt5w==
+
 markdown-it@^12.3.2:
   version "12.3.2"
   resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-12.3.2.tgz#bf92ac92283fe983fe4de8ff8abfb5ad72cd0c90"