js. Why doesn't switching to the front camera work in Safari on iPhone?

Question

JavaScript

I use the eco.bs54.ru service and I don’t understand why switching to the front camera does not work in Safari on the iPhone. Either click touch events do not fire, or the camera is not detected, I don’t know.

Also, when you click on the button on the right (a cloud with an arrow), the file selection should open, but it does not open.

The device is not at hand.