@@ -0,0 +1,16 @@
+import { chromium } from 'playwright';
+/* Scrolls a target into view and captures it at several moments, to see a draw-in happen. */
+const [,, url, prefix, selector, width = '1440', times = '150,700,1600,3200'] = process.argv;
+const browser = await chromium.launch();
+const page = await browser.newPage({ viewport: { width: Number(width), height: 900 } });
+await page.goto(url, { waitUntil: 'networkidle' });
+const el = page.locator(selector).first();
+await el.scrollIntoViewIfNeeded();
+const t0 = Date.now();
+for (const t of times.split(',').map(Number)) {
+  const wait = t - (Date.now() - t0);
+  if (wait > 0) await page.waitForTimeout(wait);
+  await el.screenshot({ path: `${prefix}-${t}.png` });
+}
+await browser.close();
+console.log('captured', selector);