Chore/upgrade eslint

.gitignore

@@ -1,26 +1,30 @@
-*.DS_Store
-.project
+!*.gitkeep
+
+.nyc_output/*
+.vscode/settings.json
 node_modules/*
+
+analyzer/
+bower-repo/
+coverage/
+examples/3d/
 experiments/*
+dist/
+docs/reference/*
+docs/data.json
 lib_old/*
 lib/p5.*
+lib/p5-test.js
 lib/modules
-docs/reference/*
-!*.gitkeep
-examples/3d/
-.idea
-dist/
-*.d.ts
-p5.zip
-bower-repo/
 p5-website/
-.vscode/settings.json
-.nyc_output/*
-coverage/
-lib/p5-test.js
+preview/
 release/
+__screenshots__/
+
+*.d.ts
+p5.zip
 yarn.lock
-docs/data.json
-analyzer/
-preview/
-__screenshots__/
+
+*.DS_Store
+.idea
+.project

eslint.config.mjs

@@ -1,12 +1,130 @@
-export default [
-  {
-    ignores: [
-      "preview/*",
-      "docs/reference/assets/**/*",
-      "docs/assets/**/*",
-      "lib/*",
-      "rollup.config.mjs",
-      "utils/sample-linter.mjs"
-    ]
+import { fileURLToPath } from 'node:url';
+
+import { defineConfig, globalIgnores } from 'eslint/config';
+import { includeIgnoreFile } from '@eslint/compat';
+
+import globals from 'globals';
+import js from '@eslint/js';
+import stylistic from '@stylistic/eslint-plugin';
+
+const gitignore = fileURLToPath(new URL('.gitignore', import.meta.url));
+
+export default defineConfig([
+  includeIgnoreFile(gitignore),
+  globalIgnores([
+    'node_modules/**',
+    'contributor_docs/**',
+    'lib/**',
+    'src/core/reference.js',
+    'src/type/lib/Typr.js', // wat?
+    'utils/sample-linter.mjs'
+  ]),
+  {
+    name: 'eslint recommended',
+    ...js.configs.recommended
+  },
+  {
+    name: 'common rules',
+    plugins: {
+      '@stylistic': stylistic
+    },
+    linterOptions: {
+      reportUnusedDisableDirectives: false
+    },
+    rules: {
+      // '@stylistic/arrow-parens': ['error', 'as-needed'],
+      // '@stylistic/comma-dangle': ['error', 'never'],
+      // eqeqeq: ['error', 'smart'],
+      eqeqeq: 0,
+      // '@stylistic/indent': ['error', 2, { SwitchCase: 1 }],
+      // '@stylistic/linebreak-style': ['error', 'unix'],
+      // '@stylistic/max-len': [
+      //   'error',
+      //   {
+      //     code: 80,
+      //     ignoreComments: true,
+      //     ignoreStrings: true,
+      //     ignoreTemplateLiterals: true,
+      //     ignoreRegExpLiterals: true
+      //   }
+      // ],
+      'new-cap': 0,
+      'no-async-promise-executor': 0,
+      // 'no-caller': 2,
+      'no-caller': 0,
+      'no-case-declarations': 0, // @eslint recommended
+      // 'no-cond-assign': [2, 'except-parens'],
+      'no-cond-assign': 0,
+      'no-console': 0,
+      'no-constant-binary-expression': 0, // @eslint recommended
+      'no-constant-condition': 0, // @eslint recommended
+      'no-dupe-class-members': 0, // @eslint recommended
+      'no-dupe-keys': 0, // @eslint recommended
+      // 'no-empty': ['error', { allowEmptyCatch: true }],
+      'no-empty': 0,
+      'no-fallthrough': 0, // @eslint recommended
+      'no-prototype-builtins': 0,
+      'no-redeclare': 0, // @eslint recommended
+      'no-shadow-restricted-names': 0, // @eslint recommended
+      // '@stylistic/no-trailing-spaces': ['error'],
+      'no-unexpected-multiline': 0, // @eslint recommended
+      'no-undef': 0,
+      'no-unreachable': 0, // @eslint recommended
+      'no-unused-private-class-members': 0, // @eslint recommended
+      // 'no-unused-vars': ['error', { args: 'none' }],
+      'no-unused-vars': 0,
+      // 'no-use-before-define': [2, { functions: false }],
+      'no-use-before-define': 0,
+      'no-useless-escape': 0, // @eslint recommended
+      // '@stylistic/object-curly-spacing': ['error', 'always'],
+      // '@stylistic/quotes': ['error', 'single', { avoidEscape: true }],
+      // '@stylistic/semi': ['error', 'always']
+    }
+  },
+  {
+    name: 'p5 source files',
+    files: ['src/**/*.js'],
+    languageOptions: {
+      ecmaVersion: 2022,
+      globals: {
+        ...globals.browser,
+        ...globals.es2022
+      }
+    }
+  },
+  {
+    name: 'p5 node env',
+    files: [
+      'test/**/*',
+      'utils/**/*',
+      '**/*.config.mjs',
+      'vitest.workspace.mjs'
+    ],
+    languageOptions: {
+      ecmaVersion: 'latest',
+      globals: {
+        ...globals.nodeBuiltin
+      }
+    }
+  },
+  {
+    name: 'p5 test files',
+    files: [
+      'test/**/*'
+    ],
+    languageOptions: {
+      globals: {
+        // legacy ./test/eslintrc.json
+        ...globals.mocha,
+        'assert': false,
+        'expect': false,
+        'promisedSketch': true,
+        'testSketchWithPromise': true,
+        'parallelSketches': true,
+        'createP5Iframe': true,
+        'P5_SCRIPT_URL': true,
+        'P5_SCRIPT_TAG': true
+      }
+    }
   }
-];
+]);