init

.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+dist

.eslintrc.yml

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+---
+root: true
+
+plugins:
+  - jest
+  - babel
+
+env:
+  node: true
+  jest: true
+  browser: true
+
+parser: "@babel/eslint-parser"
+
+parserOptions: 
+  parser: '@babel/eslint-parser'
+  requireConfigFile: false
+  ecmaVersion: 2018
+  sourceType: 'module'
+
+extends:
+  - "airbnb-base"
+  - "plugin:jest/recommended"
+
+rules:
+  no-console: 0
+  import/extensions: 0

.github/workflows/nodejs.yml

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+# Name of workflow
+name: Node CI
+
+# Trigger the workflow on push or pull request
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+
+    # The type of machine to run the job on
+    runs-on: ubuntu-latest
+
+    strategy:
+      # Node versions list
+      matrix:
+        node-version: [18.x]
+
+    steps:
+      # Check-out repository under GitHub workspace
+      # https://github.com/actions/checkout
+      - uses: actions/checkout@v3
+        # Step's name
+      - name: Use Node.js ${{ matrix.node-version }}
+        # Configures the node version used on GitHub-hosted runners
+        # https://github.com/actions/setup-node
+        uses: actions/setup-node@v3
+        # The Node.js version to configure
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: npm install, build
+        # Install and build project
+        run: |
+          make install
+          make build
+        # Add environment variables
+        env:
+          CI: true
+
+      - name: Run linter
+        run: make lint
+
+      - name: Run tests
+        run: make test

.gitignore

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+/node_modules/
+*.log
+dist
+assets

.npmrc

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+legacy-peer-deps=true

Makefile

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+develop:
+	npx webpack serve
+
+install:
+	npm ci
+
+build:
+	NODE_ENV=production npx webpack
+
+test:
+	npm test
+
+lint:
+	npx eslint .
+
+.PHONY: test

__tests__/__fixtures__/index.html

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+<div id="point"></div>

__tests__/test.js

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+// @ts-check
+
+import { promises as fs } from 'fs';
+import path from 'path';
+import init from '../src/init';
+
+beforeEach(async () => {
+  const pathToHtml = path.resolve(__dirname, '__fixtures__/index.html');
+  const html = await fs.readFile(pathToHtml, 'utf8');
+  document.body.innerHTML = html;
+});
+
+test('init', () => {
+  init();
+  expect(true).toBeDefined();
+});

babel.config.json

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+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "targets": {
+          "node": "current"
+        }
+      }
+    ]
+  ]
+}