Javascript tweaks (#3211)

* Run eslint on html files as well

* Use Maps in janus.js

* Fix always false conditional

* Use Maps for Janus.sessions in janus.js

.eslintrc.js

@@ -1,4 +1,4 @@
-// eslint-disable-next-line no-undef
+/* global module */
 module.exports = {
 	"env": {
 		"browser": true,
@@ -8,6 +8,9 @@ module.exports = {
 	"parserOptions": {
 		"ecmaVersion": 2017
 	},
+	"plugins": [
+		"html"
+	],
 	"extends": "eslint:recommended",
 	"rules": {
 		"no-console": "off",

.github/workflows/janus-ci.yml

@@ -161,7 +161,7 @@ jobs:
     - name: Install modules
       run: npm install
     - name: Run ESLint
-      run: node_modules/.bin/eslint html
+      run: npm run lint
   javascript-rollup:
     runs-on: ubuntu-22.04
     steps: