major: Version 4 - ESM only

.eslintrc.cjs

@@ -0,0 +1,30 @@
+/* eslint-env node */
+module.exports = {
+  env: {
+    commonjs: false,
+    es2021: true,
+    node: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:prettier/recommended",
+  ],
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint"],
+  overrides: [
+    {
+      env: {
+        jest: true,
+      },
+      files: ["test/**"],
+      plugins: ["jest"],
+      extends: ["plugin:jest/recommended"],
+      rules: {},
+    },
+  ],
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+  },
+};

.prettierrc.js → .prettierrc.cjs

@@ -1,5 +1,5 @@
 module.exports = {
-  trailingComma: 'es5',
+  trailingComma: "es5",
   tabWidth: 2,
   semi: true,
   singleQuote: true,

jest.config.ts

@@ -1,9 +1,9 @@
 import type { JestConfigWithTsJest } from 'ts-jest';
 
-import { defaults as tsjPreset } from 'ts-jest/presets';
+// import { defaults as tsjPreset } from 'ts-jest/presets';
 // import { defaultsESM as tsjPreset } from 'ts-jest/presets';
 // import { jsWithTs as tsjPreset } from 'ts-jest/presets';
-// import { jsWithTsESM as tsjPreset } from 'ts-jest/presets';
+import { jsWithTsESM as tsjPreset } from 'ts-jest/presets';
 // import { jsWithBabel as tsjPreset } from 'ts-jest/presets';
 // import { jsWithBabelESM as tsjPreset } from 'ts-jest/presets';
 
@@ -225,31 +225,33 @@ const jestConfig: JestConfigWithTsJest = {
    * See: https://kulshekhar.github.io/ts-jest/docs/getting-started/presets
    * See: https://kulshekhar.github.io/ts-jest/docs/getting-started/options/
    */
+  // preset: 'ts-jest/presets/js-with-ts',
+  transformIgnorePatterns: ['node_modules/(?!gettext-parser/)'],
   // preset: 'ts-jest/presets/default-esm',
   // preset: 'ts-jest',
-  // extensionsToTreatAsEsm: ['.ts'],
-  // moduleNameMapper: {
-  //   '^(\\.{1,2}/.*)\\.js$': '$1',
-  // },
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
   testEnvironment: 'node',
   // testEnvironmentOptions: {
   //   NODE_OPTIONS: '--experimental-vm-modules',
   // },
   transform: {
     ...tsjPreset.transform,
-    // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
-    // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
-    '^.+\\.tsx?$': [
-      'ts-jest',
-      {
-        // ts-jest configuration goes here
-        diagnostics: false,
-        babelConfig: {
-          plugins: ['babel-plugin-transform-import-meta'],
-        },
-        // useESM: true,
-      },
-    ],
+    // // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
+    // // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
+    // '^.+\\.[jt]sx?$': [
+    //   'ts-jest',
+    //   {
+    //     // ts-jest configuration goes here
+    //     diagnostics: false,
+    //     // babelConfig: {
+    //     //   plugins: ['babel-plugin-transform-import-meta'],
+    //     // },
+    //     useESM: true,
+    //   },
+    // ],
   },
 };