Upgrade to ESLint 9

.editorconfig

@@ -9,7 +9,7 @@ trim_trailing_whitespace = true
 [*.html]
 indent_style = tab
 
-[*.js]
+[*.{js,mjs}]
 indent_style = tab
 
 [*.json]

.markdownlint.json

@@ -12,6 +12,7 @@
 	"no-multiple-blanks": {
 		"maximum": 2
 	},
+	"no-trailing-spaces": true,
 	"ul-indent": false,
 	"ul-style": {
 		"style": "consistent"

.markdownlintignore

@@ -0,0 +1,2 @@
+.git/
+node_modules/

eslint.config.mjs

@@ -0,0 +1,61 @@
+import globals from "globals";
+import html from "eslint-plugin-html";
+import js from "@eslint/js";
+import neostandard, { resolveIgnoresFromGitignore } from 'neostandard';
+import stylistic from '@stylistic/eslint-plugin';
+
+export default [
+	{
+		files: ["**/*.js"],
+		languageOptions: {
+			globals: {
+				...globals.browser,
+			},
+			sourceType: "script",
+		},
+	},
+	{
+		files: ["**/*.html"],
+		plugins: { html },
+		settings: {
+			"html/indent": "tab",
+			"html/report-bad-indent": "error",
+		},
+	},
+	{
+		ignores: [
+			...resolveIgnoresFromGitignore(),
+		],
+	},
+	js.configs.recommended,
+	// stylistic.configs['recommended-flat'],
+	...neostandard(),
+	{
+		plugins: {
+			"@stylistic": stylistic,
+		},
+		rules: {
+			"camelcase": "off",
+			"eqeqeq": "off",
+			"no-empty": ["error", { "allowEmptyCatch": true }],
+			"no-unused-vars": ["error", {
+				"args": "none",
+				"caughtErrors": "none",
+			}],
+			"object-shorthand": ["warn", "consistent"],
+			"yoda": "off",
+			"@stylistic/indent": ["warn", "tab", { "SwitchCase": 1 }],
+			"@stylistic/linebreak-style": ["error", "unix"],
+			"@stylistic/max-len": ["warn", 165],
+			"@stylistic/no-tabs": "off",
+			"@stylistic/quotes": ["off", "single", { "avoidEscape": true }],
+			"@stylistic/quote-props": ["warn", "consistent"],
+			"@stylistic/semi": ["warn", "always"],
+			"@stylistic/space-before-function-paren": ["warn", {
+				"anonymous": "always",
+				"asyncArrow": "always",
+				"named": "never",
+			}],
+		},
+	},
+];

package.json

@@ -28,19 +28,22 @@
 		"url": "https://github.com/alexandrainst/node-red-contrib-mock-cli.git"
 	},
 	"devDependencies": {
-		"eslint": "^8.53.0",
-		"eslint-config-standard": "^17.1.0",
-		"eslint-plugin-html": "^8.0.0",
-		"eslint-plugin-import": "^2.29.0",
-		"eslint-plugin-n": "^16.2.0",
-		"eslint-plugin-promise": "^6.1.1"
+		"eslint": "^9.8.0",
+		"@eslint/js": "^9.8.0",
+		"eslint-plugin-html": "^8.1.1",
+		"globals": "^15.9.0",
+		"markdownlint-cli": "^0.41.0",
+		"neostandard": "^0.11.2",
+		"node-red-contrib-mock-cli": "^1.4.1"
 	},
 	"scripts": {
+		"eslint": "eslint .",
+		"eslint_fix": "eslint --fix .",
+		"markdownlint": "markdownlint '**/*.md'",
+		"markdownlint_fix": "markdownlint --fix '**/*.md'",
+		"fix": "npm run rtlcss && npm run eslint_fix && npm run markdownlint_fix",
+		"pretest": "npm run eslint && npm run markdownlint",
 		"start": "node ./index.js",
-		"eslint": "eslint --ext .js,.html .",
-		"eslint_fix": "eslint --fix --ext .js,.html .",
-		"fix": "npm run eslint_fix",
-		"pretest": "npm run-script eslint",
 		"test": "echo '{\"payload\":3}' | node ./test.js test-node --multiplyBy='5' | grep -q '{\"payload\":15}' && echo 'OK'"
 	}
 }