How Playwright Can Record Polished Product Demos Without a Human Operator

A developer built an automated product demo recorder for a platform called Kynth using Playwright, driving a real Chrome browser through app flows without any human input. The key challenge was not simulating clicks but reliably detecting when a page was truly ready for the next step, rather than relying on fixed time delays. To solve this, the system uses a DOM mutation observer that waits for the page to go quiet for a short window, combined with a hard timeout ceiling to handle pages that never fully settle. The recorder is structured as a state machine, where each step includes an action, a settle-detection phase, and an assertion to confirm the correct screen was reached. This approach makes demos appear hand-driven while remaining robust across varying network conditions and machine speeds.