I built a behavioural experimentation engine back in 2013ish using then new HTML5 + certain new JavaScript APIs with surprisingly robust, accurate and precise t

I built a behavioural experimentation engine back in 2013ish using then new HTML5 + certain new JavaScript APIs with surprisingly robust, accurate and precise timing back when Flash presence was still relatively strong. We proved that certain subliminal effects for which tight control of presentation times (<30 ms) is necessary, up to then something only reserved for highly controlled lab settings, were also possible to research online, making behavioural experiments an order of magnitude easier to perform. Especially, it seems, in this age of covid. Unfortunately the method the engine was embedded in was built on a closed platform... and died shortly after the first major re-design of that platform. At least its legacy lives on.