How to disable page scrolling on mobile?

There are 2 methods for this:

In the Javascript code (inside the exported index.html file) add the following at the end:

function preventBehavior(e) {
  e.preventDefault(); 
};

const canvas = document.getElementById('glcanvas');
canvas.addEventListener('touchmove', preventBehavior, false);

You can also add the touchscreen op for mobile/tablets/touchscreens and disable the following settings. Disable scaling or Disable scroll