Prepare Prettier config (#1347)

* Update prettier to latest
* Update prettier config, turn into esm
* Add prettier scripts
* Format one file for testing
* Add test/fixtures to prettier ignore to preserve sourcemaps for testing

Author: matux

.prettierignore

@@ -17,3 +17,7 @@ vendor
 # 2. some tests fail cause they depend on some sources being exactly as they are
 examples
 !test/examples
+
+# Test fixtures include compiled/generated files with sourcemaps
+# Formatting them breaks the sourcemaps
+test/fixtures

eslint.config.mjs

@@ -14,20 +14,20 @@ export default defineConfig([
     },
     rules: {
       'comma-dangle': 'off',
-      'strict': 0,
+      strict: 0,
       'no-underscore-dangle': 0,
       'no-useless-escape': 0,
-      'complexity': [2, { 'max': 35 }],
-      'no-use-before-define': [0, { 'functions': false }],
+      complexity: [2, { max: 35 }],
+      'no-use-before-define': [0, { functions: false }],
       'no-prototype-builtins': 0,
 
       // Off until issues are fixed
-      'camelcase': 'off', //[2, {'properties': 'never'}],
+      camelcase: 'off', //[2, {'properties': 'never'}],
       'no-unused-vars': 'off', //[2, { 'argsIgnorePattern': '^_' }],
-      'quotes': 'off', //[2, 'single', 'avoid-escape'],
-    }
+      quotes: 'off', //[2, 'single', 'avoid-escape'],
+    },
   },
   {
     ignores: ['dist', 'examples', 'node_modules', 'vendor'],
-  }
+  },
 ]);

package-lock.json

@@ -98,7 +98,7 @@
     "mocha": "^11.1.0",
     "nock": "^11.9.1",
     "node-libs-browser": "^0.5.2",
-    "prettier": "^3.2.5",
+    "prettier": "^3.6.2",
     "sinon": "^8.1.1",
     "webpack": "^5.98.0",
     "webpack-cli": "^6.0.1",
@@ -114,6 +114,8 @@
     "test:wtr": "web-test-runner",
     "test:wtr:watch": "web-test-runner --watch",
     "lint": "./node_modules/.bin/eslint .",
+    "format": "prettier --write \"**/*.{js,cjs,mjs,md,json,yml,yaml}\"",
+    "format:check": "prettier --check \"**/*.{js,cjs,mjs,md,json,yml,yaml}\"",
     "pack": "node scripts/pack.js",
     "validate": "npm run validate:es5 && npm run validate:examples",
     "validate:es5": "es-check es5 './dist/**/*.js' --verbose",

package.json

@@ -1,7 +1,7 @@
+// https://prettier.io/docs/en/options.html
 /**
  * @type {import('prettier').Config}
  */
-module.exports = {
-  trailingComma: 'all',
+export default {
   singleQuote: true,
 };