Migrate to eslint 9

eslint.config.mjs

@@ -0,0 +1,52 @@
+
+import globals from 'globals';
+import jsdoc from 'eslint-plugin-jsdoc';
+
+export default [
+  jsdoc.configs['flat/recommended'],
+  {
+    name: 'eslint-config-snordian-h5p',
+    files: ['**/*.js'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      sourceType: 'module',
+      globals: {
+        ...globals.browser,
+        H5P: 'readonly',
+        H5PEditor: 'readonly',
+        H5PIntegration: 'readonly'
+      }
+    },
+    rules: {
+      semi: ['error', 'always'],
+      indent: ['error', 2, { 'SwitchCase': 1 }],
+      'brace-style': ['error', 'stroustrup'],
+      'keyword-spacing': ['error', { 'after': true }],
+      'comma-spacing': ['error', { 'before': false, 'after': true }],
+      'space-infix-ops': ['error', { 'int32Hint': false }],
+      eqeqeq: ['error', 'smart'],
+      'space-before-blocks': 'error',
+      'space-before-function-paren': ['error', {
+        'anonymous': 'always',
+        'named': 'never',
+        'asyncArrow': 'always'
+      }],
+      'no-extra-boolean-cast': 'off',
+      'no-console': ['error', { 'allow': ['warn', 'error'] }],
+      quotes: ['error', 'single'],
+      'arrow-parens': ['error', 'always'],
+      'object-curly-spacing': ['error', 'always'],
+      'no-alert': ['error'],
+    },
+    plugins: {
+      jsdoc
+    },
+    settings: {
+      jsdoc: {
+        preferredTypes: {
+          Function: 'function'
+        }
+      }
+    }
+  }
+];

package.json

@@ -41,6 +41,7 @@
   },
   "dependencies": {
     "color": "^4.2.3",
+    "globals": "^15.0.0",
     "he": "^1.2.0"
   },
   "browserslist": "> 0.5%, last 2 versions, Firefox ESR, not dead"