[Bug]: UI at the bottom of the app sometimes disappears. - Githubissues

Telegram-Mini-Apps / telegram-apps

Made from scratch TypeScript packages, examples and documentation you will surely need to start developing on Telegram Mini Apps.

https://docs.telegram-mini-apps.com/

MIT License

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[Bug]: UI at the bottom of the app sometimes disappears. #289

Closed flagg2 closed 7 months ago

flagg2 commented 7 months ago

Telegram Application

Telegram for iOS

Describe the Bug

When I programatically call viewport.expand() while working with a miniapp, the UI disappears too soon when scrolling

An example of this happening (the heading at the bottom disappears): https://github.com/Telegram-Mini-Apps/tma.js/assets/65034737/4dbd18dd-f458-4de8-85ca-20aa7f7583c9

The issue is not present if I resize the viewport manually. Tested on ios and mac, only happens on ios (dont konw about android)

To Reproduce

have a miniapp with larger ui than is the screen height (a scrollable container)
call .expand() programatically
watch the ui at the bottom of screen flicker / disappear

Expected Behavior

The UI should remain visible as long as it is on the screen.

heyqbnk commented 7 months ago

Hey.

Not related to tma.js. Described problem is related to iOS Web View specific problems. As far as I remember, it is somehow connected with using position sticky, fixed, or something like that