Thanks for replying, Peter. My iPad Pro generates mouse and keyboard input which works with every browser I have tested - Safari, Chrome, Firefox etc. I have also used many GUI libraries such as OPC and dat.GUI. Never a problem with sliders. I think your library looks very cool and would like to use it too, but sliders and range don’t respond. I found your Quark page on OpenProcessing and tried a few sketches sketches. All CanvasGui features work fine except range and slider. I’m sure Sinan Ascioglu would assist you to get CanvasGUI fully functional on OP.
Richard