Merge pull request #314 from csfloat/chore/upgrade-eslint-9-prettier-3

Upgrade to ESLint 9 & Prettier 3

Author: Step7750

.eslintrc

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [20.x]
 
     steps:
     - uses: actions/checkout@v3
@@ -24,6 +24,6 @@ jobs:
 
     - name: Lint
       run: |
-        npm install
+        npm ci
         npm run lint
         npm run checkformat

.github/workflows/lint.yml

@@ -3,5 +3,6 @@
     "singleQuote": true,
     "bracketSpacing": false,
     "semi": true,
-    "printWidth": 120
+    "printWidth": 120,
+    "trailingComma": "es5"
 }

.prettierrc

@@ -0,0 +1,51 @@
+import {defineConfig} from 'eslint/config';
+import typescriptEslint from '@typescript-eslint/eslint-plugin';
+import globals from 'globals';
+import tsParser from '@typescript-eslint/parser';
+import path from 'node:path';
+import {fileURLToPath} from 'node:url';
+import js from '@eslint/js';
+import {FlatCompat} from '@eslint/eslintrc';
+import {includeIgnoreFile} from '@eslint/compat';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all,
+});
+
+const lintIgnorePath = fileURLToPath(new URL('.lintignore', import.meta.url));
+
+export default defineConfig([
+    includeIgnoreFile(lintIgnorePath),
+    {
+        files: ['**/*.{js,ts}'],
+        extends: compat.extends('eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'),
+
+        plugins: {
+            '@typescript-eslint': typescriptEslint,
+        },
+
+        languageOptions: {
+            globals: {
+                ...globals.browser,
+            },
+
+            parser: tsParser,
+            ecmaVersion: 12,
+            sourceType: 'module',
+        },
+
+        rules: {
+            '@typescript-eslint/no-non-null-assertion': 'off',
+            '@typescript-eslint/no-explicit-any': 'off',
+            '@typescript-eslint/no-inferrable-types': 'off',
+            '@typescript-eslint/ban-ts-comment': 'off',
+            '@typescript-eslint/no-empty-function': 'off',
+            '@typescript-eslint/no-unused-vars': 'off',
+            '@typescript-eslint/no-empty-object-type': 'off',
+        },
+    },
+]);