Added script

backstop_data/engine_scripts/puppeteer/onBefore.js

@@ -0,0 +1,18 @@
+module.exports = async (page, scenario) => {
+  await page.goto(scenario.url, { waitUntil: 'networkidle2' });
+
+  console.log('Page loaded.');
+
+  // Count the number of items in the side navigation and log their text
+  const navItems = await page.$$eval('nav ul li.usa-sidenav__item a', (items) =>
+    items.map((item) => item.textContent.trim())
+  );
+
+  console.log(`Found ${navItems.length} navigation items:`);
+  navItems.forEach((itemText, index) => {
+    console.log(`${index + 1}: ${itemText}`);
+  });
+
+  // Wait a moment for the logging to complete
+  await new Promise((resolve) => setTimeout(resolve, 1000));
+};