feat: lint JavaScript in Markdown files (#364)

.eslintrc.js

@@ -3,7 +3,8 @@
 module.exports = {
     extends: [
         "fluid",
-        "plugin:yml/standard"
+        "plugin:yml/standard",
+        "plugin:markdown/recommended"
     ],
     ignorePatterns: ["_site/", "src/_locales/messages.js", "!.*.cjs", "!.*.js", "!.github/"],
     env: {
@@ -14,5 +15,11 @@ module.exports = {
     },
     parserOptions: {
         ecmaVersion: 2020
-    }
+    },
+    overrides: [
+        {
+            files: ["**/*.md"],
+            processor: "markdown/markdown"
+        }
+    ]
 };

README.md

@@ -250,16 +250,16 @@ internationalization for a specific collection, you can do so in one of two ways
    // Custom collections
    const livePosts = post => post.date <= now && !post.data.draft;
    siteConfig.locales.forEach(locale => {
-     eleventyConfig.addCollection(`posts_${locale}`, collection => {
-         return collection.getFilteredByGlob(`./src/collections/posts/${locale}/*.md`).filter(livePosts);
-     });
+       eleventyConfig.addCollection(`posts_${locale}`, collection => {
+           return collection.getFilteredByGlob(`./src/collections/posts/${locale}/*.md`).filter(livePosts);
+       });
 
-     // The following collection is used to create a collection of posts for the RSS feed.
-     eleventyConfig.addCollection(`postFeed_${locale}`, collection => {
-         return collection.getFilteredByGlob(`./src/collections/posts/${locale}/*.md`).filter(livePosts)
-             .reverse()
-             .slice(0, siteConfig.maxPostsInFeed);
-     });
+       // The following collection is used to create a collection of posts for the RSS feed.
+       eleventyConfig.addCollection(`postFeed_${locale}`, collection => {
+           return collection.getFilteredByGlob(`./src/collections/posts/${locale}/*.md`).filter(livePosts)
+               .reverse()
+               .slice(0, siteConfig.maxPostsInFeed);
+       });
    });
    ```
 

package.json

@@ -11,7 +11,7 @@
         "dev": "cross-env NODE_ENV=development eleventy --serve",
         "lint": "run-s -l lint:*",
         "lint:css": "stylelint \"**/*.css\"",
-        "lint:js": "eslint \"**/*.js\"",
+        "lint:js": "eslint \"**/*.{js,md}\"",
         "lint:markdown": "markdownlint-cli2 \"**/*.md\"",
         "lint:yml": "eslint \"**/*.yml\"",
         "start": "npm-run-all -l clean -p start:*",
@@ -47,6 +47,7 @@
         "eslint": "8.47.0",
         "eslint-config-fluid": "2.1.1",
         "eslint-plugin-jsdoc": "46.4.6",
+        "eslint-plugin-markdown": "3.0.1",
         "eslint-plugin-yml": "1.8.0",
         "husky": "8.0.3",
         "image-size": "1.0.2",
@@ -64,6 +65,9 @@
     "lint-staged": {
         "*.css": "stylelint --fix",
         "*.{js,yml}": "eslint --fix",
-        "*.md": "markdownlint-cli2 --fix"
+        "*.md": [
+            "markdownlint-cli2 --fix",
+            "eslint --fix"
+        ]
     }
 }