iPhone Demo Not Displaying Callout?

[VikR1000]

I loaded 192.#.#:#/iphone/ on my iPhone. I see the "Clear Token" button. But when I click it, nothing happens.

I also loaded it in iPhone simulator and examined the console logs with Safari. I see:

Add to homescreen: not displaying callout because service workers are not supported

What is the correct way to use as-ideas/add-to-homescreen-react with iPhone?

[lucasltv]

Same issue here....

[justinledelson]

Anyone figure out why this is broken?