Add eslint-plugin-html to lint JS in HTML files

.eslintignore

@@ -3,4 +3,6 @@
 **/vendor/
 /_site/
 /js/coverage/
+/js/tests/integration/
 /site/static/sw.js
+/site/layouts/

js/tests/unit/.eslintrc.json

@@ -1,4 +1,7 @@
 {
+  "plugins": [
+    "html"
+  ],
   "extends": [
     "../../../.eslintrc.json"
   ],

js/tests/visual/.eslintrc.json

@@ -0,0 +1,12 @@
+{
+  "plugins": [
+    "html"
+  ],
+  "extends": "../../../.eslintrc.json",
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "settings": {
+    "html/html-extensions": [".html"]
+  }
+}

package.json

@@ -63,7 +63,7 @@
     "js-compile-standalone-esm": "rollup --environment ESM:true,BUNDLE:false --config build/rollup.config.js --sourcemap",
     "js-compile-bundle": "rollup --environment BUNDLE:true --config build/rollup.config.js --sourcemap",
     "js-compile-plugins": "node build/build-plugins.js",
-    "js-lint": "eslint --cache --cache-location .cache/.eslintcache --report-unused-disable-directives .",
+    "js-lint": "eslint --cache --cache-location .cache/.eslintcache --report-unused-disable-directives --ext .html,.js .",
     "js-minify": "npm-run-all --aggregate-output --parallel js-minify-*",
     "js-minify-standalone": "terser --compress passes=2 --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.js.map,includeSources,url=bootstrap.min.js.map\" --output dist/js/bootstrap.min.js dist/js/bootstrap.js",
     "js-minify-standalone-esm": "terser --compress passes=2 --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.esm.js.map,includeSources,url=bootstrap.esm.min.js.map\" --output dist/js/bootstrap.esm.min.js dist/js/bootstrap.esm.js",
@@ -118,6 +118,7 @@
     "cross-env": "^7.0.3",
     "eslint": "^8.23.1",
     "eslint-config-xo": "^0.42.0",
+    "eslint-plugin-html": "^7.1.0",
     "eslint-plugin-import": "^2.26.0",
     "eslint-plugin-markdown": "^3.0.0",
     "eslint-plugin-unicorn": "^43.0.2",