How would you robustly assert the presence and content of a transient UI element that appears and disappears rapidly in

👻 Playwright Challenge: Testing Transient UI Elements? Real-time web applications (dashboards, chat, stock tickers) feature UI elements that frequently appear, move, or vanish within milliseconds. Traditional Playwright assertions like toBeVisible() or toHaveText() often fail here due to race conditions. The most robust approach uses Playwright's expect.toPass() to retry an assertion block until success, combined with locator.all() for dynamic DOM re-evaluation. This "catches" the transient element during its brief appearance.