ESLint 9 flat config, Node 20 and ES Modules

.github/workflows/test.yml

@@ -13,12 +13,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout code
+        uses: actions/checkout@v4
       - name: Use Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
-          node-version: '14.x'
-      - run: npm ci
-      - run: npm test
+          node-version: '20.x'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test
         env:
           CI: true

.nvmrc

@@ -0,0 +1 @@
+20

CHANGELOG.md

@@ -1,5 +1,13 @@
 # CHANGELOG
 
+## 2.0.0
+
+- Rewrote to support new EsLint flat configuration format, now requires EsLint 9
+- Moved to ES Modules syntax
+- Changed `ecmaVersion` from `2021` to `latest` (EsLint default)
+- Removed explicit `sourceType` set to `module`, it’s already EsLint default
+- Removed `es6` and `browser` env, you have to import and set the globals yourself
+
 ## 1.0.0
 
 Initial release

README.md

@@ -7,23 +7,31 @@ Liip Lausanne EsLint common configuration (i.e. JavaScript styleguide). This pre
 
 ## Usage
 
-Install the package first.
+Version 2 requires EsLint 9+, if you use an older EsLint version, use the version 1 of this config.
+
+Install the package first:
 
 ```
 npm i -D @liip-lausanne/eslint-config
 ```
 
-Set your EsLint configuration (.eslintrc.json) to use it:
+Load the plugin into your EsLint flat configuration (eslint.config.js):
 
-```
-"extends": "@liip-lausanne"
+```js
+import eslintPluginLiipLausanne from '@liip-lausanne/eslint-config';
+
+export default {
+  // ...
+  eslintPluginLiipLausanne,
+  // ...
+};
 ```
 
 If you don’t have an EsLint config yet, you can generate one using `eslint --init`.
 
 ## Rules
 
-All the rules are defined in [index.js](https://github.com/liip-lausanne/eslint-config/blob/master/index.js).
+All the rules are defined in [index.js](https://github.com/liip-lausanne/eslint-config/blob/main/index.js).
 
 ### Code example
 

eslint.config.js

@@ -0,0 +1,12 @@
+import globals from 'globals';
+import config from './index.js';
+
+export default [
+  config,
+  {
+    languageOptions: {
+      sourceType: 'module',
+      globals: { ...globals.node, ...globals.browser },
+    },
+  },
+];

index.js

@@ -1,12 +1,4 @@
-module.exports = {
-  env: {
-    es6: true,
-    browser: true,
-  },
-  parserOptions: {
-    ecmaVersion: 2021,
-    sourceType: 'module',
-  },
+export default {
   rules: {
     // Overall styling
     camelcase: 'error',