Add support for SSR (as client-side library)

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+
+on: [push]
+
+env:
+  NODE_VERSION: 20
+
+jobs:
+  build:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # https://github.com/actions/checkout/releases/tag/v3.1.0
+
+      - name: Use Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516 # https://github.com/actions/setup-node/releases/tag/v3.5.1
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: |
+          npm ci --no-audit
+
+      - name: JavaScript lint
+        run: |
+          npm run test

babel.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  presets: [
+    '@babel/preset-env',
+  ],
+};

jest.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  testEnvironment: 'jsdom',
+  transform: {
+    '^.+\\.(js|jsx|ts|tsx)$': 'babel-jest',
+  },
+};