This page exercises the three things the script has to get right: scrolling, interactive
input, and navigation. Open it on an iPhone with ?vr=1 appended, tap
Enter VR, and slot it into a Cardboard viewer.
Type something — only the left pane is interactive, but both should show it:
If you didn't arrive with ?vr=1, this is just a normal page.
Click here to enter VR mode (or scan a QR code pointed at this URL + ?vr=1).