Add js tests workflow

Author: sfc-gh-kmcgrady

.github/workflows/js-tests.yml

@@ -0,0 +1,47 @@
+name: TS Unit Tests
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+    types: [opened, synchronize, reopened]
+  # Allows workflow to be called from other workflows
+  workflow_call:
+    inputs:
+      ref:
+        required: true
+        type: string
+
+# Avoid duplicate workflows on same branch
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-playwright
+  cancel-in-progress: true
+
+jobs:
+  js-tests:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout streamlit-bokeh code
+      uses: actions/checkout@v4
+      with:
+        ref: ${{ inputs.ref }}
+        persist-credentials: false
+        submodules: "recursive"
+        fetch-depth: 2
+    - name: Setup Node
+      uses: actions/setup-node@v4
+      with:
+        node-version-file: ".nvmrc"
+        cache: "npm"
+        cache-dependency-path: "**/package-lock.json"
+    - name: Run frontend tests
+      run: |
+        cd streamlit_bokeh/frontend
+        npm install
+        npm run test