Add grunt-html for HTML validation

Ignore v2 docs

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ jobs:
             ${{ runner.OS }}-node-v${{ env.NODE }}-${{ hashFiles('package.json') }}-${{ hashFiles('package-lock.json') }}
             ${{ runner.OS }}-node-v${{ env.NODE }}-
 
+      - run: java -version
+
       - name: Install npm dependencies
         run: npm ci
 

Gruntfile.js

@@ -51,6 +51,7 @@ module.exports = grunt => {
   grunt.loadNpmTasks('grunt-contrib-cssmin');
   grunt.loadNpmTasks('grunt-contrib-watch');
   grunt.loadNpmTasks('grunt-sass');
+  grunt.loadNpmTasks('grunt-html');
 
   // Force use of Unix newlines
   grunt.util.linefeed = '\n';
@@ -148,6 +149,21 @@ module.exports = grunt => {
         dest: ''
       }
     },
+    htmllint: {
+      options: {
+        ignore: [
+          /Attribute “autocomplete” is only allowed when the input type is.*/,
+          /Attribute “autocomplete” not allowed on element “button” at this point./,
+          /Bad value “” for attribute “action” on element “form”./
+        ]
+      },
+      src: [
+        'docs/**/*.html',
+        '!docs/**/bower_components/**/*.html',
+        '!docs/_vendor/**/*.html',
+        '!docs/2/**/*.html'
+      ]
+    },
     connect: {
       options: {
         hostname: 'localhost',
@@ -238,6 +254,7 @@ module.exports = grunt => {
   });
 
   grunt.registerTask('vendor', 'copy:vendor');
+
   grunt.registerTask('docs-css', ['sass:docs', 'postcss:docs']);
 
   grunt.registerTask('server', 'connect:keepalive');

package.json

@@ -14,8 +14,9 @@
   },
   "scripts": {
     "build": "grunt swatch",
+    "htmllint": "grunt htmllint",
     "stylelint": "stylelint \"{build,dist,docs/_assets}/**/*.scss\" --rd",
-    "test": "npm run stylelint"
+    "test": "npm run stylelint && npm run htmllint"
   },
   "files": [
     "dist/**/*.{css,scss}"
@@ -33,6 +34,7 @@
     "grunt-contrib-copy": "^1.0.0",
     "grunt-contrib-cssmin": "^3.0.0",
     "grunt-contrib-watch": "^1.1.0",
+    "grunt-html": "^14.2.0",
     "grunt-sass": "^3.1.0",
     "jquery": "^3.5.1",
     "node-sass": "^4.14.1",