Add eslint

Author: jorgemanrubia

eslint.config.js

@@ -0,0 +1,72 @@
+import js from "@eslint/js"
+
+export default [
+  {
+    ignores: ["dist/**", "app/**", "node_modules/**", "pkg/**", "test/**", "lib/**", "bin/**", "config/**", "docs/**"]
+  },
+  js.configs.recommended,
+  {
+    files: ["src/**/*.js"],
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: "module",
+      globals: {
+        console: "readonly",
+        document: "readonly",
+        window: "readonly",
+        navigator: "readonly",
+        HTMLElement: "readonly",
+        CustomEvent: "readonly",
+        Element: "readonly",
+        Node: "readonly",
+        NodeList: "readonly",
+        Event: "readonly",
+        MutationObserver: "readonly",
+        DOMParser: "readonly",
+        Blob: "readonly",
+        File: "readonly",
+        FileReader: "readonly",
+        URL: "readonly",
+        URLSearchParams: "readonly",
+        Request: "readonly",
+        Response: "readonly",
+        FormData: "readonly",
+        fetch: "readonly",
+        setTimeout: "readonly",
+        clearTimeout: "readonly",
+        setInterval: "readonly",
+        clearInterval: "readonly",
+        XMLHttpRequest: "readonly",
+        requestAnimationFrame: "readonly",
+        cancelAnimationFrame: "readonly",
+        customElements: "readonly",
+        Prism: "readonly"
+      }
+    },
+    rules: {
+      "array-bracket-spacing": ["error", "always"],
+      "block-spacing": ["error", "always"],
+      "camelcase": ["error"],
+      "comma-spacing": ["error"],
+      "curly": ["error", "multi-line"],
+      "dot-notation": ["error"],
+      "eol-last": ["error"],
+      "func-style": ["error", "declaration"],
+      "getter-return": ["error"],
+      "keyword-spacing": ["error"],
+      "no-empty": "off",
+      "no-extra-parens": ["error"],
+      "no-multi-spaces": ["error", { "exceptions": { "VariableDeclarator": true } }],
+      "no-multiple-empty-lines": ["error", { "max": 2 }],
+      "no-restricted-globals": ["error", "event"],
+      "no-trailing-spaces": ["error"],
+      "no-unused-vars": ["error", { "vars": "all", "args": "none", "caughtErrors": "none" }],
+      "no-var": ["error"],
+      "object-curly-spacing": ["error", "always"],
+      "prefer-const": ["error"],
+      "quotes": ["error", "double"],
+      "semi": ["error", "never"],
+      "sort-imports": ["error", { "ignoreDeclarationSort": true }]
+    }
+  }
+]