Uses ESLint flat config format

eslint.config.js

@@ -0,0 +1,57 @@
+import globals from 'globals';
+import js from '@eslint/js';
+
+const common = {
+  rules: {
+    ...js.configs.recommended.rules,
+    'comma-dangle': ['warn', {
+      arrays: 'always-multiline',
+      objects: 'always-multiline',
+      imports: 'always-multiline',
+      exports: 'always-multiline',
+      functions: 'only-multiline',
+    }],
+    'eqeqeq': 'error',
+    'no-console': 'warn',
+    'no-prototype-builtins': 'warn',
+    'no-shadow': 'warn',
+    'no-undef-init': 'error',
+    'no-unused-vars': 'warn',
+    'no-var': 'error',
+    'prefer-arrow-callback': ['error', { allowNamedFunctions: true }],
+    'prefer-const': 'error',
+    'quotes': ['warn', 'single', { avoidEscape: true, allowTemplateLiterals: true }],
+    'semi': 'warn',
+  },
+  linterOptions: {
+    reportUnusedDisableDirectives: true,
+  },
+};
+
+export default [
+  {
+    files: ['**/*.js'],
+    languageOptions: { globals: globals.browser },
+    ...common,
+    ignores: [
+      'test.js',
+      'demo/react/*',
+    ],
+  },
+  {
+    files: ['demo/react/**/*.js'],
+    languageOptions: { globals: { ...globals.browser, React: 'readonly', ReactDOM: 'readonly' } },
+    ...common,
+  },
+  {
+    files: ['test.js'],
+    languageOptions: { globals: { ...globals.browser, ...globals.node } },
+    ...common,
+  },
+  {
+    ignores: [
+      'node_modules',
+      '*.d.ts',
+    ],
+  },
+];

package.json

@@ -5,6 +5,7 @@
   "version": "1.0.0-rc.57",
   "license": "SEE LICENSE IN LICENSE",
   "repository": "https://github.com/Netflix/x-element",
+  "type": "module",
   "main": "x-element.js",
   "module": "x-element.js",
   "types": "x-element.d.ts",
@@ -26,7 +27,7 @@
   ],
   "dependencies": {},
   "devDependencies": {
-    "eslint": "^8.47.0",
+    "eslint": "^8.55.0",
     "http-server": "^14.1.1",
     "puppeteer": "^21.0.3",
     "tap-parser": "^13.0.1"

test.js

@@ -1,5 +1,4 @@
-/* eslint-env node */
-const puppeteer = require('puppeteer');
+import puppeteer from 'puppeteer';
 
 (async () => {
   try {

yarn.lock

@@ -40,10 +40,10 @@
   resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.6.2.tgz#1816b5f6948029c5eaacb0703b850ee0cb37d8f8"
   integrity sha512-pPTNuaAG3QMH+buKyBIGJs3g/S5y0caxw0ygM3YyE6yJFySwiGGSzA+mM3KJ8QQvzeLh3blwgSonkFjgQdxzMw==
 
-"@eslint/eslintrc@^2.1.2":
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-2.1.2.tgz#c6936b4b328c64496692f76944e755738be62396"
-  integrity sha512-+wvgpDsrB1YqAMdEUCcnTlpfVBH7Vqn6A/NT3D8WVXFIaKMlErPIZT3oCIAVCOtarRpMtelZLqJeU3t7WY6X6g==
+"@eslint/eslintrc@^2.1.4":
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-2.1.4.tgz#388a269f0f25c1b6adc317b5a2c55714894c70ad"
+  integrity sha512-269Z39MS6wVJtsoUl10L60WdkhJVdPG24Q4eZTH3nnF6lpvSShEK3wQjDX9JRWAUPvPh7COouPpU9IrqaZFvtQ==
   dependencies:
     ajv "^6.12.4"
     debug "^4.3.2"
@@ -55,17 +55,17 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
-"@eslint/js@^8.47.0":
-  version "8.47.0"
-  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-8.47.0.tgz#5478fdf443ff8158f9de171c704ae45308696c7d"
-  integrity sha512-P6omY1zv5MItm93kLM8s2vr1HICJH8v0dvddDhysbIuZ+vcjOHg5Zbkf1mTkcmi2JA9oBG2anOkRnW8WJTS8Og==
+"@eslint/js@8.55.0":
+  version "8.55.0"
+  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-8.55.0.tgz#b721d52060f369aa259cf97392403cb9ce892ec6"
+  integrity sha512-qQfo2mxH5yVom1kacMtZZJFVdW+E70mqHMJvVg6WTLo+VBuQJ4TojZlfWBjK0ve5BdEeNAVxOsl/nvNMpJOaJA==
 
-"@humanwhocodes/config-array@^0.11.10":
-  version "0.11.10"
-  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.10.tgz#5a3ffe32cc9306365fb3fd572596cd602d5e12d2"
-  integrity sha512-KVVjQmNUepDVGXNuoRRdmmEjruj0KfiGSbS8LVc12LMsWDQzRXJ0qdhN8L8uUigKpfEHRhlaQFY0ib1tnUbNeQ==
+"@humanwhocodes/config-array@^0.11.13":
+  version "0.11.13"
+  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.13.tgz#075dc9684f40a531d9b26b0822153c1e832ee297"
+  integrity sha512-JSBDMiDKSzQVngfRjOdFXgFfklaXI4K9nLF49Auh21lmBWRLIK3+xTErTWD4KU54pb6coM6ESE7Awz/FNU3zgQ==
   dependencies:
-    "@humanwhocodes/object-schema" "^1.2.1"
+    "@humanwhocodes/object-schema" "^2.0.1"
     debug "^4.1.1"
     minimatch "^3.0.5"
 
@@ -74,10 +74,10 @@
   resolved "https://registry.yarnpkg.com/@humanwhocodes/module-importer/-/module-importer-1.0.1.tgz#af5b2691a22b44be847b0ca81641c5fb6ad0172c"
   integrity sha512-bxveV4V8v5Yb4ncFTT3rPSgZBOpCkjfK0y4oVVVJwIuDVBRMDXrPyXRL988i5ap9m9bnyEEjWfm5WkBmtffLfA==
 
-"@humanwhocodes/object-schema@^1.2.1":
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-1.2.1.tgz#b520529ec21d8e5945a1851dfd1c32e94e39ff45"
-  integrity sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==
+"@humanwhocodes/object-schema@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-2.0.1.tgz#e5211452df060fa8522b55c7b3c0c4d1981cb044"
+  integrity sha512-dvuCeX5fC9dXgJn9t+X5atfmgQAzUOWqS1254Gh0m6i8wKd10ebXkfNKiRK+1GWi/yTvvLDHpoxLr0xxxeslWw==
 
 "@nodelib/[email protected]":
   version "2.1.5"
@@ -135,6 +135,11 @@
   dependencies:
     "@types/node" "*"
 
+"@ungap/structured-clone@^1.2.0":
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@ungap/structured-clone/-/structured-clone-1.2.0.tgz#756641adb587851b5ccb3e095daf27ae581c8406"
+  integrity sha512-zuVdFrMJiuCDQUMCzQaD6KL28MjnqqN8XnAqiEq9PNm/hCPTSGfrXCOfwj1ow4LFb/tNymJPwsNbVePc1xFqrQ==
+
 acorn-jsx@^5.3.2:
   version "5.3.2"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.3.2.tgz#7ed5bb55908b3b2f1bc55c6af1653bada7f07937"
@@ -485,18 +490,19 @@ eslint-visitor-keys@^3.4.1, eslint-visitor-keys@^3.4.3:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz#0cd72fe8550e3c2eae156a96a4dddcd1c8ac5800"
   integrity sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==
 
-eslint@^8.47.0:
-  version "8.47.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-8.47.0.tgz#c95f9b935463fb4fad7005e626c7621052e90806"
-  integrity sha512-spUQWrdPt+pRVP1TTJLmfRNJJHHZryFmptzcafwSvHsceV81djHOdnEeDmkdotZyLNjDhrOasNK8nikkoG1O8Q==
+eslint@^8.55.0:
+  version "8.55.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-8.55.0.tgz#078cb7b847d66f2c254ea1794fa395bf8e7e03f8"
+  integrity sha512-iyUUAM0PCKj5QpwGfmCAG9XXbZCWsqP/eWAWrG/W0umvjuLRBECwSFdt+rCntju0xEH7teIABPwXpahftIaTdA==
   dependencies:
     "@eslint-community/eslint-utils" "^4.2.0"
     "@eslint-community/regexpp" "^4.6.1"
-    "@eslint/eslintrc" "^2.1.2"
-    "@eslint/js" "^8.47.0"
-    "@humanwhocodes/config-array" "^0.11.10"
+    "@eslint/eslintrc" "^2.1.4"
+    "@eslint/js" "8.55.0"
+    "@humanwhocodes/config-array" "^0.11.13"
     "@humanwhocodes/module-importer" "^1.0.1"
     "@nodelib/fs.walk" "^1.2.8"
+    "@ungap/structured-clone" "^1.2.0"
     ajv "^6.12.4"
     chalk "^4.0.0"
     cross-spawn "^7.0.2"