Spoiler of this post (I want to save your time): Smartphone browser working with accelerometer in this webpage: https://thermalnitrava.sk/cenniky/. Please notice that when you read this, webpage could have changed, standards, code, etc.
Recently I acquired a new smartphone (same model than my previous one, but refurbished. Happy with that) and installed the proper Lineage OS.
The surprise was when I was browsing with my old smartphone in this webpage https://thermalnitrava.sk/cenniky/ (Browsing with Chrome browser and with an old version of Lineage OS. I double checked with Brave browser and bubbles were not moving) and I noticed that the bubbles where moving according to the smartphone movement of my hand-arm, probably…throw the sensor of the accelerometer? (Since many years ago I knew that the pointer of mouse in PC, and then the tap with finger in mobiles always has been possible to be tracked by the developer of the site, but although it can seem obvious that the device movement too, I never was so conscious like right now experimenting this effect of the bubbles.)
It is the first time I feel that a smartphone, a program, a website, a company, and at the end, other people can know this information about me in real time (Of course GPS is the master about localisation). Sincerely, the possible listener about my data would not get anything interesting, but somehow I would like that my privacy will be mine, if is in my hand. (Although the most of the times I do not care about this because in the jungle of Internet I have not chance to control what is shown or not by other people, bots, bugs…So I prefer to keep calm and cold, and just flow)
So apart that for checking if your smartphone browser has access to the accelerometer of your device, this web page can help to you to develop some nice CSS-JS effects like these bubbles, or what your powerful brain could create: https://thermalnitrava.sk/cenniky/
This is a great idea! I love bubbles like this, and I could certainly see using them in some cool CSS-JS effects.