Under headless mode, my Jasmine-based e2e tests using Puppeteer fail during scrolling operations. Non-headless execution runs smoothly. Does Puppeteer inherently support scrolling in headless mode or is there a workaround?
In my experience, Puppeteer working in headless mode can sometimes act unexpectedly with scroll events due to how the rendered environment is simulated. I found that creating a more realistic viewport and delaying scroll triggers helps the browser settle before executing further actions. I experimented with setting the full viewport dimensions and synchronizing the scroll event through small delays. This approach provided a more consistent behavior when compared to the default settings, which are better suited for interactive mode than for headless operation.
hey, in my tests i had to call scrolls in a loop cause one event sometimes got skipped in headless mode. imho, its about timing & browser rendering delay rather than puppeteer bug. hope that helps!
Based on my experiences, I discovered that simulating natural scrolling behavior in headless mode involves fine-tuning the scroll simulation to match how content loads progressively. I found that reworking the scroll logic by using a sequence of smaller scroll increments and appropriate waiting periods between each step can mitigate timing issues. Relying on calculated delays that ensure all dynamic content loads before proceeding to the next scroll is crucial. Adjusting these delays based on observations from verbose logging further helps in identifying the optimal timing, leading to more stable e2e test outcomes.
hey try adjusting viewport and triggering scroll events manually. headless mode sometimes doesnt mimic real scrolling perfectly, so a slight delay or manual event triggr might help.
Through my own work with Puppeteer in headless mode, I’ve noticed that scrolling issues may not be a direct limitation of Puppeteer itself but rather an artifact of how browsers simulate scroll actions without a rendered UI. I discovered that adding explicit delays and using precise mouse events to replicate natural user interactions can mitigate these problems. I also found that experimenting with different viewport settings and device emulation configurations has led to more consistent behavior. Debugging with verbose logs to capture when and where the scroll events fail provides additional insights, eventually guiding me toward better script reliability.