WIP (this commit will be re-written): update use native Node ESM for …

…server code, update config files to specifically use .cjs (those tools don't support Node ESM files yet), use a single eslintrc file, all test code uses ESM import/export syntax instead of require (WIP)

.eslintrc.js → .eslintrc.cjs

@@ -1,3 +1,19 @@
+const deasync = require('deasync'); // powerful magic
+
+const promiseSync = deasync((promise, cb) => {
+  promise.then(result => cb(null, result)).catch(error => cb(error));
+});
+
+const importSync = name => promiseSync(import(name));
+
+// Look, no await needed here!
+const jestConfig = importSync('./jest.config.js').default;
+const testGlobals = {};
+
+for (const key of Object.keys(jestConfig.globals)) {
+  testGlobals[key] = 'readonly';
+}
+
 module.exports = {
   root: true,
   parser: 'babel-eslint',
@@ -39,6 +55,7 @@ module.exports = {
     'no-var': ['error'],
     'no-void': ['error'],
     'no-with': ['error'],
+    'no-prototype-builtins': 'off',
     radix: ['error'],
     'spaced-comment': ['error', 'always'],
     strict: ['error', 'global'],
@@ -60,4 +77,16 @@ module.exports = {
     $docsify: 'writable',
     dom: 'writable',
   },
+
+  overrides: [
+    {
+      files: ['test/**/*.js', '**/*.test.js'],
+      extends: ['plugin:jest/recommended', 'plugin:jest/style'],
+      globals: testGlobals,
+    },
+    {
+      files: ['test/e2e/**/*.test.js'],
+      extends: ['plugin:jest-playwright/recommended'],
+    },
+  ],
 };

.prettierrc.js → .prettierrc.cjs

@@ -1,4 +1,7 @@
 module.exports = {
   singleQuote: true,
   trailingComma: 'es5',
+  useTabs: false,
+  tabWidth: 2,
+  arrowParens: 'avoid',
 };

babel.config.cjs

@@ -0,0 +1,12 @@
+module.exports = {
+  // presets: [
+  //   [
+  //     '@babel/preset-env',
+  //     {
+  //       targets: {
+  //         node: 'current',
+  //       },
+  //     },
+  //   ],
+  // ],
+};

docs/ssr.md

@@ -106,8 +106,8 @@ module.exports = {
 You can run `docsify start` directly on your Node server, or write your own server app with `docsify-server-renderer`.
 
 ```js
-var Renderer = require('docsify-server-renderer')
-var readFileSync = require('fs').readFileSync
+import Renderer from 'docsify-server-renderer'
+import {readFileSync} from 'fs'
 
 // init
 var renderer = new Renderer({

jest.config.js

@@ -1,22 +1,35 @@
-const path = require('path');
-const { globals: serverGlobals } = require('./test/config/server.js');
+import path from 'path';
+import server from './test/config/server.js';
+
+const { globals: serverGlobals } = server;
+const dirname = path.dirname(import.meta.url.replace('file://', ''));
 
 const sharedConfig = {
   errorOnDeprecated: true,
   globals: {
     ...serverGlobals, // BLANK_URL, DOCS_URL, LIB_URL, NODE_MODULES_URL, TEST_HOST
-    DOCS_PATH: path.resolve(__dirname, 'docs'),
-    LIB_PATH: path.resolve(__dirname, 'lib'),
-    SRC_PATH: path.resolve(__dirname, 'src'),
+    DOCS_PATH: path.resolve(dirname, 'docs'),
+    LIB_PATH: path.resolve(dirname, 'lib'),
+    SRC_PATH: path.resolve(dirname, 'src'),
   },
-  globalSetup: './test/config/jest.setup.js',
-  globalTeardown: './test/config/jest.teardown.js',
+  globalSetup: './test/config/jest.setup.cjs',
+  globalTeardown: './test/config/jest.teardown.cjs',
   resetModules: true,
   restoreMocks: true,
 };
 
-module.exports = {
-  // Adding globals to config root for easier importing into .eslint.js, but
+// Jest configuration: https://jestjs.io/docs/en/configuration
+
+// Jest is configured for us to write our code as native ES Modules. See
+// https://github.com/facebook/jest/issues/9430 and
+// https://jestjs.io/docs/en/ecmascript-modules.
+
+export default {
+  // Disable transforms, we'll write plain JS. This is needed for native
+  // ESM
+  transform: {},
+
+  // Adding globals to config root for easier importing into .eslint.cjs, but
   // as of Jest 26.4.2 these globals need to be added to each project config
   // as well.
   globals: sharedConfig.globals,